INSERT INTO agg_csv VALUES(1,2.0);
UPDATE agg_csv SET a = 1;
DELETE FROM agg_csv WHERE a = 100;
-SELECT * FROM agg_csv FOR UPDATE OF agg_csv;
-- but this should be ignored
SELECT * FROM agg_csv FOR UPDATE;
-- updates aren't supported
INSERT INTO agg_csv VALUES(1,2.0);
-ERROR: cannot change foreign table "agg_csv"
+ERROR: cannot insert into foreign table "agg_csv"
UPDATE agg_csv SET a = 1;
-ERROR: cannot change foreign table "agg_csv"
+ERROR: cannot update foreign table "agg_csv"
DELETE FROM agg_csv WHERE a = 100;
-ERROR: cannot change foreign table "agg_csv"
-SELECT * FROM agg_csv FOR UPDATE OF agg_csv;
-ERROR: row-level locks cannot be used with foreign table "agg_csv"
-LINE 1: SELECT * FROM agg_csv FOR UPDATE OF agg_csv;
- ^
+ERROR: cannot delete from foreign table "agg_csv"
-- but this should be ignored
SELECT * FROM agg_csv FOR UPDATE;
a | b
PGconn *conn; /* connection to foreign server, or NULL */
int xact_depth; /* 0 = no xact open, 1 = main xact open, 2 =
* one level of subxact open, etc */
+ bool have_prep_stmt; /* have we prepared any stmts in this xact? */
+ bool have_error; /* have any subxacts aborted in this xact? */
} ConnCacheEntry;
/*
*/
static HTAB *ConnectionHash = NULL;
-/* for assigning cursor numbers */
+/* for assigning cursor numbers and prepared statement numbers */
static unsigned int cursor_number = 0;
+static unsigned int prep_stmt_number = 0;
/* tracks whether any work is needed in callback functions */
static bool xact_got_connection = false;
* if we don't already have a suitable one, and a transaction is opened at
* the right subtransaction nesting depth if we didn't do that already.
*
+ * will_prep_stmt must be true if caller intends to create any prepared
+ * statements. Since those don't go away automatically at transaction end
+ * (not even on error), we need this flag to cue manual cleanup.
+ *
* XXX Note that caching connections theoretically requires a mechanism to
* detect change of FDW objects to invalidate already established connections.
* We could manage that by watching for invalidation events on the relevant
* mid-transaction anyway.
*/
PGconn *
-GetConnection(ForeignServer *server, UserMapping *user)
+GetConnection(ForeignServer *server, UserMapping *user,
+ bool will_prep_stmt)
{
bool found;
ConnCacheEntry *entry;
/* initialize new hashtable entry (key is already filled in) */
entry->conn = NULL;
entry->xact_depth = 0;
+ entry->have_prep_stmt = false;
+ entry->have_error = false;
}
/*
if (entry->conn == NULL)
{
entry->xact_depth = 0; /* just to be sure */
+ entry->have_prep_stmt = false;
+ entry->have_error = false;
entry->conn = connect_pg_server(server, user);
elog(DEBUG3, "new postgres_fdw connection %p for server \"%s\"",
entry->conn, server->servername);
*/
begin_remote_xact(entry);
+ /* Remember if caller will prepare statements */
+ entry->have_prep_stmt |= will_prep_stmt;
+
return entry->conn;
}
return ++cursor_number;
}
+/*
+ * Assign a "unique" number for a prepared statement.
+ *
+ * This works much like GetCursorNumber, except that we never reset the counter
+ * within a session. That's because we can't be 100% sure we've gotten rid
+ * of all prepared statements on all connections, and it's not really worth
+ * increasing the risk of prepared-statement name collisions by resetting.
+ */
+unsigned int
+GetPrepStmtNumber(PGconn *conn)
+{
+ return ++prep_stmt_number;
+}
+
/*
* Report an error we got from the remote server.
*
* res: PGresult containing the error
* clear: if true, PQclear the result (otherwise caller will handle it)
* sql: NULL, or text of remote command we tried to execute
+ *
+ * Note: callers that choose not to throw ERROR for a remote error are
+ * responsible for making sure that the associated ConnCacheEntry gets
+ * marked with have_error = true.
*/
void
pgfdw_report_error(int elevel, PGresult *res, bool clear, const char *sql)
if (PQresultStatus(res) != PGRES_COMMAND_OK)
pgfdw_report_error(ERROR, res, true, "COMMIT TRANSACTION");
PQclear(res);
+
+ /*
+ * If there were any errors in subtransactions, and we made
+ * prepared statements, do a DEALLOCATE ALL to make sure we
+ * get rid of all prepared statements. This is annoying and
+ * not terribly bulletproof, but it's probably not worth
+ * trying harder. We intentionally ignore any errors in the
+ * DEALLOCATE.
+ */
+ if (entry->have_prep_stmt && entry->have_error)
+ {
+ res = PQexec(entry->conn, "DEALLOCATE ALL");
+ PQclear(res);
+ }
+ entry->have_prep_stmt = false;
+ entry->have_error = false;
break;
case XACT_EVENT_PRE_PREPARE:
elog(ERROR, "missed cleaning up connection during pre-commit");
break;
case XACT_EVENT_ABORT:
+ /* Assume we might have lost track of prepared statements */
+ entry->have_error = true;
/* If we're aborting, abort all remote transactions too */
res = PQexec(entry->conn, "ABORT TRANSACTION");
/* Note: can't throw ERROR, it would be infinite loop */
pgfdw_report_error(WARNING, res, true,
"ABORT TRANSACTION");
else
+ {
PQclear(res);
+ /* As above, make sure we've cleared any prepared stmts */
+ if (entry->have_prep_stmt && entry->have_error)
+ {
+ res = PQexec(entry->conn, "DEALLOCATE ALL");
+ PQclear(res);
+ }
+ entry->have_prep_stmt = false;
+ entry->have_error = false;
+ }
break;
}
}
else
{
+ /* Assume we might have lost track of prepared statements */
+ entry->have_error = true;
/* Rollback all remote subtransactions during abort */
snprintf(sql, sizeof(sql),
"ROLLBACK TO SAVEPOINT s%d; RELEASE SAVEPOINT s%d",
#include "postgres_fdw.h"
+#include "access/heapam.h"
#include "access/htup_details.h"
#include "access/sysattr.h"
#include "access/transam.h"
/*
* Functions to construct string representation of a node tree.
*/
+static void deparseTargetList(StringInfo buf,
+ PlannerInfo *root,
+ Index rtindex,
+ Relation rel,
+ Bitmapset *attrs_used);
+static void deparseReturningList(StringInfo buf, PlannerInfo *root,
+ Index rtindex, Relation rel,
+ List *returningList);
static void deparseColumnRef(StringInfo buf, int varno, int varattno,
PlannerInfo *root);
static void deparseRelation(StringInfo buf, Oid relid);
/*
- * Construct a simple SELECT statement that retrieves interesting columns
+ * Construct a simple SELECT statement that retrieves desired columns
* of the specified foreign table, and append it to "buf". The output
* contains just "SELECT ... FROM tablename".
- *
- * "Interesting" columns are those appearing in the rel's targetlist or
- * in local_conds (conditions which can't be executed remotely).
*/
void
-deparseSimpleSql(StringInfo buf,
+deparseSelectSql(StringInfo buf,
PlannerInfo *root,
RelOptInfo *baserel,
- List *local_conds)
+ Bitmapset *attrs_used)
{
- RangeTblEntry *rte = root->simple_rte_array[baserel->relid];
- Bitmapset *attrs_used = NULL;
- bool have_wholerow;
- bool first;
- AttrNumber attr;
- ListCell *lc;
+ RangeTblEntry *rte = planner_rt_fetch(baserel->relid, root);
+ Relation rel;
- /* Collect all the attributes needed for joins or final output. */
- pull_varattnos((Node *) baserel->reltargetlist, baserel->relid,
- &attrs_used);
+ /*
+ * Core code already has some lock on each rel being planned, so we can
+ * use NoLock here.
+ */
+ rel = heap_open(rte->relid, NoLock);
- /* Add all the attributes used by local_conds. */
- foreach(lc, local_conds)
- {
- RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
+ /*
+ * Construct SELECT list
+ */
+ appendStringInfoString(buf, "SELECT ");
+ deparseTargetList(buf, root, baserel->relid, rel, attrs_used);
- pull_varattnos((Node *) rinfo->clause, baserel->relid,
- &attrs_used);
- }
+ /*
+ * Construct FROM clause
+ */
+ appendStringInfoString(buf, " FROM ");
+ deparseRelation(buf, RelationGetRelid(rel));
+
+ heap_close(rel, NoLock);
+}
+
+/*
+ * Emit a target list that retrieves the columns specified in attrs_used.
+ * This is used for both SELECT and RETURNING targetlists.
+ *
+ * We list attributes in order of the foreign table's columns, but replace
+ * any attributes that need not be fetched with NULL constants. (We can't
+ * just omit such attributes, or we'll lose track of which columns are
+ * which at runtime.) Note however that any dropped columns are ignored.
+ * Also, if ctid needs to be retrieved, it's added at the end.
+ */
+static void
+deparseTargetList(StringInfo buf,
+ PlannerInfo *root,
+ Index rtindex,
+ Relation rel,
+ Bitmapset *attrs_used)
+{
+ TupleDesc tupdesc = RelationGetDescr(rel);
+ bool have_wholerow;
+ bool first;
+ int i;
/* If there's a whole-row reference, we'll need all the columns. */
have_wholerow = bms_is_member(0 - FirstLowInvalidHeapAttributeNumber,
attrs_used);
- /*
- * Construct SELECT list
- *
- * We list attributes in order of the foreign table's columns, but replace
- * any attributes that need not be fetched with NULL constants. (We can't
- * just omit such attributes, or we'll lose track of which columns are
- * which at runtime.) Note however that any dropped columns are ignored.
- */
- appendStringInfo(buf, "SELECT ");
first = true;
- for (attr = 1; attr <= baserel->max_attr; attr++)
+ for (i = 1; i <= tupdesc->natts; i++)
{
+ Form_pg_attribute attr = tupdesc->attrs[i - 1];
+
/* Ignore dropped attributes. */
- if (get_rte_attribute_is_dropped(rte, attr))
+ if (attr->attisdropped)
continue;
if (!first)
- appendStringInfo(buf, ", ");
+ appendStringInfoString(buf, ", ");
first = false;
if (have_wholerow ||
- bms_is_member(attr - FirstLowInvalidHeapAttributeNumber,
+ bms_is_member(i - FirstLowInvalidHeapAttributeNumber,
attrs_used))
- deparseColumnRef(buf, baserel->relid, attr, root);
+ deparseColumnRef(buf, rtindex, i, root);
else
- appendStringInfo(buf, "NULL");
+ appendStringInfoString(buf, "NULL");
}
- /* Don't generate bad syntax if no undropped columns */
- if (first)
- appendStringInfo(buf, "NULL");
-
/*
- * Construct FROM clause
+ * Add ctid if needed. We currently don't support retrieving any other
+ * system columns.
*/
- appendStringInfo(buf, " FROM ");
- deparseRelation(buf, rte->relid);
+ if (bms_is_member(SelfItemPointerAttributeNumber - FirstLowInvalidHeapAttributeNumber,
+ attrs_used))
+ {
+ if (!first)
+ appendStringInfoString(buf, ", ");
+ first = false;
+
+ appendStringInfoString(buf, "ctid");
+ }
+
+ /* Don't generate bad syntax if no undropped columns */
+ if (first)
+ appendStringInfoString(buf, "NULL");
}
/*
*/
void
appendWhereClause(StringInfo buf,
- bool is_first,
+ PlannerInfo *root,
List *exprs,
- PlannerInfo *root)
+ bool is_first)
{
ListCell *lc;
/* Connect expressions with "AND" and parenthesize each condition. */
if (is_first)
- appendStringInfo(buf, " WHERE ");
+ appendStringInfoString(buf, " WHERE ");
else
- appendStringInfo(buf, " AND ");
+ appendStringInfoString(buf, " AND ");
appendStringInfoChar(buf, '(');
deparseExpr(buf, ri->clause, root);
}
}
+/*
+ * deparse remote INSERT statement
+ */
+void
+deparseInsertSql(StringInfo buf, PlannerInfo *root, Index rtindex,
+ List *targetAttrs, List *returningList)
+{
+ RangeTblEntry *rte = planner_rt_fetch(rtindex, root);
+ Relation rel = heap_open(rte->relid, NoLock);
+ TupleDesc tupdesc = RelationGetDescr(rel);
+ AttrNumber pindex;
+ bool first;
+ ListCell *lc;
+
+ appendStringInfoString(buf, "INSERT INTO ");
+ deparseRelation(buf, rte->relid);
+ appendStringInfoString(buf, "(");
+
+ first = true;
+ foreach(lc, targetAttrs)
+ {
+ int attnum = lfirst_int(lc);
+ Form_pg_attribute attr = tupdesc->attrs[attnum - 1];
+
+ Assert(!attr->attisdropped);
+
+ if (!first)
+ appendStringInfoString(buf, ", ");
+ first = false;
+
+ deparseColumnRef(buf, rtindex, attnum, root);
+ }
+
+ appendStringInfoString(buf, ") VALUES (");
+
+ pindex = 1;
+ first = true;
+ foreach(lc, targetAttrs)
+ {
+ if (!first)
+ appendStringInfoString(buf, ", ");
+ first = false;
+
+ appendStringInfo(buf, "$%d", pindex);
+ pindex++;
+ }
+
+ appendStringInfoString(buf, ")");
+
+ if (returningList)
+ deparseReturningList(buf, root, rtindex, rel, returningList);
+
+ heap_close(rel, NoLock);
+}
+
+/*
+ * deparse remote UPDATE statement
+ */
+void
+deparseUpdateSql(StringInfo buf, PlannerInfo *root, Index rtindex,
+ List *targetAttrs, List *returningList)
+{
+ RangeTblEntry *rte = planner_rt_fetch(rtindex, root);
+ Relation rel = heap_open(rte->relid, NoLock);
+ TupleDesc tupdesc = RelationGetDescr(rel);
+ AttrNumber pindex;
+ bool first;
+ ListCell *lc;
+
+ appendStringInfoString(buf, "UPDATE ");
+ deparseRelation(buf, rte->relid);
+ appendStringInfoString(buf, " SET ");
+
+ pindex = 2; /* ctid is always the first param */
+ first = true;
+ foreach(lc, targetAttrs)
+ {
+ int attnum = lfirst_int(lc);
+ Form_pg_attribute attr = tupdesc->attrs[attnum - 1];
+
+ Assert(!attr->attisdropped);
+
+ if (!first)
+ appendStringInfoString(buf, ", ");
+ first = false;
+
+ deparseColumnRef(buf, rtindex, attnum, root);
+ appendStringInfo(buf, " = $%d", pindex);
+ pindex++;
+ }
+ appendStringInfoString(buf, " WHERE ctid = $1");
+
+ if (returningList)
+ deparseReturningList(buf, root, rtindex, rel, returningList);
+
+ heap_close(rel, NoLock);
+}
+
+/*
+ * deparse remote DELETE statement
+ */
+void
+deparseDeleteSql(StringInfo buf, PlannerInfo *root, Index rtindex,
+ List *returningList)
+{
+ RangeTblEntry *rte = planner_rt_fetch(rtindex, root);
+
+ appendStringInfoString(buf, "DELETE FROM ");
+ deparseRelation(buf, rte->relid);
+ appendStringInfoString(buf, " WHERE ctid = $1");
+
+ if (returningList)
+ {
+ Relation rel = heap_open(rte->relid, NoLock);
+
+ deparseReturningList(buf, root, rtindex, rel, returningList);
+ heap_close(rel, NoLock);
+ }
+}
+
+/*
+ * deparse RETURNING clause of INSERT/UPDATE/DELETE
+ */
+static void
+deparseReturningList(StringInfo buf, PlannerInfo *root,
+ Index rtindex, Relation rel,
+ List *returningList)
+{
+ Bitmapset *attrs_used;
+
+ /*
+ * We need the attrs mentioned in the query's RETURNING list.
+ */
+ attrs_used = NULL;
+ pull_varattnos((Node *) returningList, rtindex,
+ &attrs_used);
+
+ appendStringInfoString(buf, " RETURNING ");
+ deparseTargetList(buf, root, rtindex, rel, attrs_used);
+}
+
/*
* Construct SELECT statement to acquire size in blocks of given relation.
*
ListCell *lc;
bool first = true;
- appendStringInfo(buf, "SELECT ");
+ appendStringInfoString(buf, "SELECT ");
for (i = 0; i < tupdesc->natts; i++)
{
/* Ignore dropped columns. */
if (tupdesc->attrs[i]->attisdropped)
continue;
+ if (!first)
+ appendStringInfoString(buf, ", ");
+ first = false;
+
/* Use attribute name or column_name option. */
colname = NameStr(tupdesc->attrs[i]->attname);
options = GetForeignColumnOptions(relid, i + 1);
}
}
- if (!first)
- appendStringInfo(buf, ", ");
appendStringInfoString(buf, quote_identifier(colname));
- first = false;
}
/* Don't generate bad syntax for zero-column relation. */
if (first)
- appendStringInfo(buf, "NULL");
+ appendStringInfoString(buf, "NULL");
/*
* Construct FROM clause
*/
- appendStringInfo(buf, " FROM ");
+ appendStringInfoString(buf, " FROM ");
deparseRelation(buf, relid);
}
ListCell *lc;
/* varno must not be any of OUTER_VAR, INNER_VAR and INDEX_VAR. */
- Assert(varno >= 1 && varno <= root->simple_rel_array_size);
+ Assert(!IS_SPECIAL_VARNO(varno));
/* Get RangeTblEntry from array in PlannerInfo. */
- rte = root->simple_rte_array[varno];
+ rte = planner_rt_fetch(varno, root);
/*
* If it's a column of a foreign table, and it has the column_name FDW
}
/*
- * Note: we could skip printing the schema name if it's pg_catalog,
- * but that doesn't seem worth the trouble.
+ * Note: we could skip printing the schema name if it's pg_catalog, but
+ * that doesn't seem worth the trouble.
*/
if (nspname == NULL)
nspname = get_namespace_name(get_rel_namespace(relid));
appendStringInfoChar(buf, '(');
deparseExpr(buf, linitial(node->args), root);
- appendStringInfo(buf, " IS DISTINCT FROM ");
+ appendStringInfoString(buf, " IS DISTINCT FROM ");
deparseExpr(buf, lsecond(node->args), root);
appendStringInfoChar(buf, ')');
}
op = "OR";
break;
case NOT_EXPR:
- appendStringInfo(buf, "(NOT ");
+ appendStringInfoString(buf, "(NOT ");
deparseExpr(buf, linitial(node->args), root);
appendStringInfoChar(buf, ')');
return;
appendStringInfoChar(buf, '(');
deparseExpr(buf, node->arg, root);
if (node->nulltesttype == IS_NULL)
- appendStringInfo(buf, " IS NULL)");
+ appendStringInfoString(buf, " IS NULL)");
else
- appendStringInfo(buf, " IS NOT NULL)");
+ appendStringInfoString(buf, " IS NOT NULL)");
}
/*
bool first = true;
ListCell *lc;
- appendStringInfo(buf, "ARRAY[");
+ appendStringInfoString(buf, "ARRAY[");
foreach(lc, node->elements)
{
if (!first)
- appendStringInfo(buf, ", ");
+ appendStringInfoString(buf, ", ");
deparseExpr(buf, lfirst(lc), root);
first = false;
}
(1 row)
COMMIT;
+-- ===================================================================
+-- test writable foreign table stuff
+-- ===================================================================
+EXPLAIN (verbose, costs off)
+INSERT INTO ft2 (c1,c2,c3) SELECT c1+1000,c2+100, c3 || c3 FROM ft2 LIMIT 20;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Insert on public.ft2
+ Remote SQL: INSERT INTO "S 1"."T 1"("C 1", c2, c3) VALUES ($1, $2, $3)
+ -> Subquery Scan on "*SELECT*"
+ Output: NULL::integer, "*SELECT*"."?column?", "*SELECT*"."?column?_1", "*SELECT*"."?column?_2", NULL::timestamp with time zone, NULL::timestamp without time zone, NULL::character varying, NULL::bpchar, NULL::user_enum
+ -> Limit
+ Output: ((ft2_1.c1 + 1000)), ((ft2_1.c2 + 100)), ((ft2_1.c3 || ft2_1.c3))
+ -> Foreign Scan on public.ft2 ft2_1
+ Output: (ft2_1.c1 + 1000), (ft2_1.c2 + 100), (ft2_1.c3 || ft2_1.c3)
+ Remote SQL: SELECT "C 1", c2, c3, NULL, NULL, NULL, NULL, NULL FROM "S 1"."T 1"
+(9 rows)
+
+INSERT INTO ft2 (c1,c2,c3) SELECT c1+1000,c2+100, c3 || c3 FROM ft2 LIMIT 20;
+INSERT INTO ft2 (c1,c2,c3)
+ VALUES (1101,201,'aaa'), (1102,202,'bbb'), (1103,203,'ccc') RETURNING *;
+ c1 | c2 | c3 | c4 | c5 | c6 | c7 | c8
+------+-----+-----+----+----+----+----+----
+ 1101 | 201 | aaa | | | | |
+ 1102 | 202 | bbb | | | | |
+ 1103 | 203 | ccc | | | | |
+(3 rows)
+
+INSERT INTO ft2 (c1,c2,c3) VALUES (1104,204,'ddd'), (1105,205,'eee');
+UPDATE ft2 SET c2 = c2 + 300, c3 = c3 || '_update3' WHERE c1 % 10 = 3;
+UPDATE ft2 SET c2 = c2 + 400, c3 = c3 || '_update7' WHERE c1 % 10 = 7 RETURNING *;
+ c1 | c2 | c3 | c4 | c5 | c6 | c7 | c8
+------+-----+--------------------+------------------------------+--------------------------+----+------------+-----
+ 7 | 407 | 00007_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 17 | 407 | 00017_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 27 | 407 | 00027_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 37 | 407 | 00037_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 47 | 407 | 00047_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 57 | 407 | 00057_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 67 | 407 | 00067_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 77 | 407 | 00077_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 87 | 407 | 00087_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 97 | 407 | 00097_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 107 | 407 | 00107_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 117 | 407 | 00117_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 127 | 407 | 00127_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 137 | 407 | 00137_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 147 | 407 | 00147_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 157 | 407 | 00157_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 167 | 407 | 00167_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 177 | 407 | 00177_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 187 | 407 | 00187_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 197 | 407 | 00197_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 207 | 407 | 00207_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 217 | 407 | 00217_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 227 | 407 | 00227_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 237 | 407 | 00237_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 247 | 407 | 00247_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 257 | 407 | 00257_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 267 | 407 | 00267_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 277 | 407 | 00277_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 287 | 407 | 00287_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 297 | 407 | 00297_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 307 | 407 | 00307_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 317 | 407 | 00317_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 327 | 407 | 00327_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 337 | 407 | 00337_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 347 | 407 | 00347_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 357 | 407 | 00357_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 367 | 407 | 00367_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 377 | 407 | 00377_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 387 | 407 | 00387_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 397 | 407 | 00397_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 407 | 407 | 00407_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 417 | 407 | 00417_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 427 | 407 | 00427_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 437 | 407 | 00437_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 447 | 407 | 00447_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 457 | 407 | 00457_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 467 | 407 | 00467_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 477 | 407 | 00477_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 487 | 407 | 00487_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 497 | 407 | 00497_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 507 | 407 | 00507_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 517 | 407 | 00517_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 527 | 407 | 00527_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 537 | 407 | 00537_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 547 | 407 | 00547_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 557 | 407 | 00557_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 567 | 407 | 00567_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 577 | 407 | 00577_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 587 | 407 | 00587_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 597 | 407 | 00597_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 607 | 407 | 00607_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 617 | 407 | 00617_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 627 | 407 | 00627_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 637 | 407 | 00637_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 647 | 407 | 00647_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 657 | 407 | 00657_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 667 | 407 | 00667_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 677 | 407 | 00677_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 687 | 407 | 00687_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 697 | 407 | 00697_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 707 | 407 | 00707_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 717 | 407 | 00717_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 727 | 407 | 00727_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 737 | 407 | 00737_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 747 | 407 | 00747_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 757 | 407 | 00757_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 767 | 407 | 00767_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 777 | 407 | 00777_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 787 | 407 | 00787_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 797 | 407 | 00797_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 807 | 407 | 00807_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 817 | 407 | 00817_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 827 | 407 | 00827_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 837 | 407 | 00837_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 847 | 407 | 00847_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 857 | 407 | 00857_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 867 | 407 | 00867_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 877 | 407 | 00877_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 887 | 407 | 00887_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 897 | 407 | 00897_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 907 | 407 | 00907_update7 | Thu Jan 08 00:00:00 1970 PST | Thu Jan 08 00:00:00 1970 | 7 | 7 | foo
+ 917 | 407 | 00917_update7 | Sun Jan 18 00:00:00 1970 PST | Sun Jan 18 00:00:00 1970 | 7 | 7 | foo
+ 927 | 407 | 00927_update7 | Wed Jan 28 00:00:00 1970 PST | Wed Jan 28 00:00:00 1970 | 7 | 7 | foo
+ 937 | 407 | 00937_update7 | Sat Feb 07 00:00:00 1970 PST | Sat Feb 07 00:00:00 1970 | 7 | 7 | foo
+ 947 | 407 | 00947_update7 | Tue Feb 17 00:00:00 1970 PST | Tue Feb 17 00:00:00 1970 | 7 | 7 | foo
+ 957 | 407 | 00957_update7 | Fri Feb 27 00:00:00 1970 PST | Fri Feb 27 00:00:00 1970 | 7 | 7 | foo
+ 967 | 407 | 00967_update7 | Mon Mar 09 00:00:00 1970 PST | Mon Mar 09 00:00:00 1970 | 7 | 7 | foo
+ 977 | 407 | 00977_update7 | Thu Mar 19 00:00:00 1970 PST | Thu Mar 19 00:00:00 1970 | 7 | 7 | foo
+ 987 | 407 | 00987_update7 | Sun Mar 29 00:00:00 1970 PST | Sun Mar 29 00:00:00 1970 | 7 | 7 | foo
+ 997 | 407 | 00997_update7 | Wed Apr 08 00:00:00 1970 PST | Wed Apr 08 00:00:00 1970 | 7 | 7 | foo
+ 1007 | 507 | 0000700007_update7 | | | | |
+ 1017 | 507 | 0001700017_update7 | | | | |
+(102 rows)
+
+EXPLAIN (verbose, costs off)
+UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9'
+ FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9;
+ QUERY PLAN
+----------------------------------------------------------------------------------------------------------------------------------------------
+ Update on public.ft2
+ Remote SQL: UPDATE "S 1"."T 1" SET c2 = $2, c3 = $3 WHERE ctid = $1
+ -> Hash Join
+ Output: NULL::integer, ft2.c1, (ft2.c2 + 500), (ft2.c3 || '_update9'::text), ft2.c4, ft2.c5, ft2.c6, ft2.c7, ft2.c8, ft2.ctid, ft1.*
+ Hash Cond: (ft2.c2 = ft1.c1)
+ -> Foreign Scan on public.ft2
+ Output: ft2.c1, ft2.c2, ft2.c3, ft2.c4, ft2.c5, ft2.c6, ft2.c7, ft2.c8, ft2.ctid
+ Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8, ctid FROM "S 1"."T 1" FOR UPDATE
+ -> Hash
+ Output: ft1.*, ft1.c1
+ -> Foreign Scan on public.ft1
+ Output: ft1.*, ft1.c1
+ Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((("C 1" % 10) = 9))
+(13 rows)
+
+UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9'
+ FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9;
+DELETE FROM ft2 WHERE c1 % 10 = 5 RETURNING *;
+ c1 | c2 | c3 | c4 | c5 | c6 | c7 | c8
+------+-----+------------+------------------------------+--------------------------+----+------------+-----
+ 5 | 5 | 00005 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 15 | 5 | 00015 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 25 | 5 | 00025 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 35 | 5 | 00035 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 45 | 5 | 00045 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 55 | 5 | 00055 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 65 | 5 | 00065 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 75 | 5 | 00075 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 85 | 5 | 00085 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 95 | 5 | 00095 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 105 | 5 | 00105 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 115 | 5 | 00115 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 125 | 5 | 00125 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 135 | 5 | 00135 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 145 | 5 | 00145 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 155 | 5 | 00155 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 165 | 5 | 00165 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 175 | 5 | 00175 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 185 | 5 | 00185 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 195 | 5 | 00195 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 205 | 5 | 00205 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 215 | 5 | 00215 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 225 | 5 | 00225 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 235 | 5 | 00235 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 245 | 5 | 00245 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 255 | 5 | 00255 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 265 | 5 | 00265 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 275 | 5 | 00275 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 285 | 5 | 00285 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 295 | 5 | 00295 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 305 | 5 | 00305 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 315 | 5 | 00315 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 325 | 5 | 00325 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 335 | 5 | 00335 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 345 | 5 | 00345 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 355 | 5 | 00355 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 365 | 5 | 00365 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 375 | 5 | 00375 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 385 | 5 | 00385 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 395 | 5 | 00395 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 405 | 5 | 00405 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 415 | 5 | 00415 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 425 | 5 | 00425 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 435 | 5 | 00435 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 445 | 5 | 00445 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 455 | 5 | 00455 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 465 | 5 | 00465 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 475 | 5 | 00475 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 485 | 5 | 00485 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 495 | 5 | 00495 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 505 | 5 | 00505 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 515 | 5 | 00515 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 525 | 5 | 00525 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 535 | 5 | 00535 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 545 | 5 | 00545 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 555 | 5 | 00555 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 565 | 5 | 00565 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 575 | 5 | 00575 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 585 | 5 | 00585 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 595 | 5 | 00595 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 605 | 5 | 00605 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 615 | 5 | 00615 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 625 | 5 | 00625 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 635 | 5 | 00635 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 645 | 5 | 00645 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 655 | 5 | 00655 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 665 | 5 | 00665 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 675 | 5 | 00675 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 685 | 5 | 00685 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 695 | 5 | 00695 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 705 | 5 | 00705 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 715 | 5 | 00715 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 725 | 5 | 00725 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 735 | 5 | 00735 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 745 | 5 | 00745 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 755 | 5 | 00755 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 765 | 5 | 00765 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 775 | 5 | 00775 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 785 | 5 | 00785 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 795 | 5 | 00795 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 805 | 5 | 00805 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 815 | 5 | 00815 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 825 | 5 | 00825 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 835 | 5 | 00835 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 845 | 5 | 00845 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 855 | 5 | 00855 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 865 | 5 | 00865 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 875 | 5 | 00875 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 885 | 5 | 00885 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 895 | 5 | 00895 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 905 | 5 | 00905 | Tue Jan 06 00:00:00 1970 PST | Tue Jan 06 00:00:00 1970 | 5 | 5 | foo
+ 915 | 5 | 00915 | Fri Jan 16 00:00:00 1970 PST | Fri Jan 16 00:00:00 1970 | 5 | 5 | foo
+ 925 | 5 | 00925 | Mon Jan 26 00:00:00 1970 PST | Mon Jan 26 00:00:00 1970 | 5 | 5 | foo
+ 935 | 5 | 00935 | Thu Feb 05 00:00:00 1970 PST | Thu Feb 05 00:00:00 1970 | 5 | 5 | foo
+ 945 | 5 | 00945 | Sun Feb 15 00:00:00 1970 PST | Sun Feb 15 00:00:00 1970 | 5 | 5 | foo
+ 955 | 5 | 00955 | Wed Feb 25 00:00:00 1970 PST | Wed Feb 25 00:00:00 1970 | 5 | 5 | foo
+ 965 | 5 | 00965 | Sat Mar 07 00:00:00 1970 PST | Sat Mar 07 00:00:00 1970 | 5 | 5 | foo
+ 975 | 5 | 00975 | Tue Mar 17 00:00:00 1970 PST | Tue Mar 17 00:00:00 1970 | 5 | 5 | foo
+ 985 | 5 | 00985 | Fri Mar 27 00:00:00 1970 PST | Fri Mar 27 00:00:00 1970 | 5 | 5 | foo
+ 995 | 5 | 00995 | Mon Apr 06 00:00:00 1970 PST | Mon Apr 06 00:00:00 1970 | 5 | 5 | foo
+ 1005 | 105 | 0000500005 | | | | |
+ 1015 | 105 | 0001500015 | | | | |
+ 1105 | 205 | eee | | | | |
+(103 rows)
+
+EXPLAIN (verbose, costs off)
+DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2;
+ QUERY PLAN
+----------------------------------------------------------------------------------------------------------------------
+ Delete on public.ft2
+ Remote SQL: DELETE FROM "S 1"."T 1" WHERE ctid = $1
+ -> Hash Join
+ Output: ft2.ctid, ft1.*
+ Hash Cond: (ft2.c2 = ft1.c1)
+ -> Foreign Scan on public.ft2
+ Output: ft2.ctid, ft2.c2
+ Remote SQL: SELECT NULL, c2, NULL, NULL, NULL, NULL, NULL, NULL, ctid FROM "S 1"."T 1" FOR UPDATE
+ -> Hash
+ Output: ft1.*, ft1.c1
+ -> Foreign Scan on public.ft1
+ Output: ft1.*, ft1.c1
+ Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((("C 1" % 10) = 2))
+(13 rows)
+
+DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2;
+SELECT c1,c2,c3,c4 FROM ft2 ORDER BY c1;
+ c1 | c2 | c3 | c4
+------+-----+--------------------+------------------------------
+ 1 | 1 | 00001 | Fri Jan 02 00:00:00 1970 PST
+ 3 | 303 | 00003_update3 | Sun Jan 04 00:00:00 1970 PST
+ 4 | 4 | 00004 | Mon Jan 05 00:00:00 1970 PST
+ 6 | 6 | 00006 | Wed Jan 07 00:00:00 1970 PST
+ 7 | 407 | 00007_update7 | Thu Jan 08 00:00:00 1970 PST
+ 8 | 8 | 00008 | Fri Jan 09 00:00:00 1970 PST
+ 9 | 509 | 00009_update9 | Sat Jan 10 00:00:00 1970 PST
+ 10 | 0 | 00010 | Sun Jan 11 00:00:00 1970 PST
+ 11 | 1 | 00011 | Mon Jan 12 00:00:00 1970 PST
+ 13 | 303 | 00013_update3 | Wed Jan 14 00:00:00 1970 PST
+ 14 | 4 | 00014 | Thu Jan 15 00:00:00 1970 PST
+ 16 | 6 | 00016 | Sat Jan 17 00:00:00 1970 PST
+ 17 | 407 | 00017_update7 | Sun Jan 18 00:00:00 1970 PST
+ 18 | 8 | 00018 | Mon Jan 19 00:00:00 1970 PST
+ 19 | 509 | 00019_update9 | Tue Jan 20 00:00:00 1970 PST
+ 20 | 0 | 00020 | Wed Jan 21 00:00:00 1970 PST
+ 21 | 1 | 00021 | Thu Jan 22 00:00:00 1970 PST
+ 23 | 303 | 00023_update3 | Sat Jan 24 00:00:00 1970 PST
+ 24 | 4 | 00024 | Sun Jan 25 00:00:00 1970 PST
+ 26 | 6 | 00026 | Tue Jan 27 00:00:00 1970 PST
+ 27 | 407 | 00027_update7 | Wed Jan 28 00:00:00 1970 PST
+ 28 | 8 | 00028 | Thu Jan 29 00:00:00 1970 PST
+ 29 | 509 | 00029_update9 | Fri Jan 30 00:00:00 1970 PST
+ 30 | 0 | 00030 | Sat Jan 31 00:00:00 1970 PST
+ 31 | 1 | 00031 | Sun Feb 01 00:00:00 1970 PST
+ 33 | 303 | 00033_update3 | Tue Feb 03 00:00:00 1970 PST
+ 34 | 4 | 00034 | Wed Feb 04 00:00:00 1970 PST
+ 36 | 6 | 00036 | Fri Feb 06 00:00:00 1970 PST
+ 37 | 407 | 00037_update7 | Sat Feb 07 00:00:00 1970 PST
+ 38 | 8 | 00038 | Sun Feb 08 00:00:00 1970 PST
+ 39 | 509 | 00039_update9 | Mon Feb 09 00:00:00 1970 PST
+ 40 | 0 | 00040 | Tue Feb 10 00:00:00 1970 PST
+ 41 | 1 | 00041 | Wed Feb 11 00:00:00 1970 PST
+ 43 | 303 | 00043_update3 | Fri Feb 13 00:00:00 1970 PST
+ 44 | 4 | 00044 | Sat Feb 14 00:00:00 1970 PST
+ 46 | 6 | 00046 | Mon Feb 16 00:00:00 1970 PST
+ 47 | 407 | 00047_update7 | Tue Feb 17 00:00:00 1970 PST
+ 48 | 8 | 00048 | Wed Feb 18 00:00:00 1970 PST
+ 49 | 509 | 00049_update9 | Thu Feb 19 00:00:00 1970 PST
+ 50 | 0 | 00050 | Fri Feb 20 00:00:00 1970 PST
+ 51 | 1 | 00051 | Sat Feb 21 00:00:00 1970 PST
+ 53 | 303 | 00053_update3 | Mon Feb 23 00:00:00 1970 PST
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+ 57 | 407 | 00057_update7 | Fri Feb 27 00:00:00 1970 PST
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+ 59 | 509 | 00059_update9 | Sun Mar 01 00:00:00 1970 PST
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+ 63 | 303 | 00063_update3 | Thu Mar 05 00:00:00 1970 PST
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+ 137 | 407 | 00137_update7 | Sat Feb 07 00:00:00 1970 PST
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+ 527 | 407 | 00527_update7 | Wed Jan 28 00:00:00 1970 PST
+ 528 | 8 | 00528 | Thu Jan 29 00:00:00 1970 PST
+ 529 | 509 | 00529_update9 | Fri Jan 30 00:00:00 1970 PST
+ 530 | 0 | 00530 | Sat Jan 31 00:00:00 1970 PST
+ 531 | 1 | 00531 | Sun Feb 01 00:00:00 1970 PST
+ 533 | 303 | 00533_update3 | Tue Feb 03 00:00:00 1970 PST
+ 534 | 4 | 00534 | Wed Feb 04 00:00:00 1970 PST
+ 536 | 6 | 00536 | Fri Feb 06 00:00:00 1970 PST
+ 537 | 407 | 00537_update7 | Sat Feb 07 00:00:00 1970 PST
+ 538 | 8 | 00538 | Sun Feb 08 00:00:00 1970 PST
+ 539 | 509 | 00539_update9 | Mon Feb 09 00:00:00 1970 PST
+ 540 | 0 | 00540 | Tue Feb 10 00:00:00 1970 PST
+ 541 | 1 | 00541 | Wed Feb 11 00:00:00 1970 PST
+ 543 | 303 | 00543_update3 | Fri Feb 13 00:00:00 1970 PST
+ 544 | 4 | 00544 | Sat Feb 14 00:00:00 1970 PST
+ 546 | 6 | 00546 | Mon Feb 16 00:00:00 1970 PST
+ 547 | 407 | 00547_update7 | Tue Feb 17 00:00:00 1970 PST
+ 548 | 8 | 00548 | Wed Feb 18 00:00:00 1970 PST
+ 549 | 509 | 00549_update9 | Thu Feb 19 00:00:00 1970 PST
+ 550 | 0 | 00550 | Fri Feb 20 00:00:00 1970 PST
+ 551 | 1 | 00551 | Sat Feb 21 00:00:00 1970 PST
+ 553 | 303 | 00553_update3 | Mon Feb 23 00:00:00 1970 PST
+ 554 | 4 | 00554 | Tue Feb 24 00:00:00 1970 PST
+ 556 | 6 | 00556 | Thu Feb 26 00:00:00 1970 PST
+ 557 | 407 | 00557_update7 | Fri Feb 27 00:00:00 1970 PST
+ 558 | 8 | 00558 | Sat Feb 28 00:00:00 1970 PST
+ 559 | 509 | 00559_update9 | Sun Mar 01 00:00:00 1970 PST
+ 560 | 0 | 00560 | Mon Mar 02 00:00:00 1970 PST
+ 561 | 1 | 00561 | Tue Mar 03 00:00:00 1970 PST
+ 563 | 303 | 00563_update3 | Thu Mar 05 00:00:00 1970 PST
+ 564 | 4 | 00564 | Fri Mar 06 00:00:00 1970 PST
+ 566 | 6 | 00566 | Sun Mar 08 00:00:00 1970 PST
+ 567 | 407 | 00567_update7 | Mon Mar 09 00:00:00 1970 PST
+ 568 | 8 | 00568 | Tue Mar 10 00:00:00 1970 PST
+ 569 | 509 | 00569_update9 | Wed Mar 11 00:00:00 1970 PST
+ 570 | 0 | 00570 | Thu Mar 12 00:00:00 1970 PST
+ 571 | 1 | 00571 | Fri Mar 13 00:00:00 1970 PST
+ 573 | 303 | 00573_update3 | Sun Mar 15 00:00:00 1970 PST
+ 574 | 4 | 00574 | Mon Mar 16 00:00:00 1970 PST
+ 576 | 6 | 00576 | Wed Mar 18 00:00:00 1970 PST
+ 577 | 407 | 00577_update7 | Thu Mar 19 00:00:00 1970 PST
+ 578 | 8 | 00578 | Fri Mar 20 00:00:00 1970 PST
+ 579 | 509 | 00579_update9 | Sat Mar 21 00:00:00 1970 PST
+ 580 | 0 | 00580 | Sun Mar 22 00:00:00 1970 PST
+ 581 | 1 | 00581 | Mon Mar 23 00:00:00 1970 PST
+ 583 | 303 | 00583_update3 | Wed Mar 25 00:00:00 1970 PST
+ 584 | 4 | 00584 | Thu Mar 26 00:00:00 1970 PST
+ 586 | 6 | 00586 | Sat Mar 28 00:00:00 1970 PST
+ 587 | 407 | 00587_update7 | Sun Mar 29 00:00:00 1970 PST
+ 588 | 8 | 00588 | Mon Mar 30 00:00:00 1970 PST
+ 589 | 509 | 00589_update9 | Tue Mar 31 00:00:00 1970 PST
+ 590 | 0 | 00590 | Wed Apr 01 00:00:00 1970 PST
+ 591 | 1 | 00591 | Thu Apr 02 00:00:00 1970 PST
+ 593 | 303 | 00593_update3 | Sat Apr 04 00:00:00 1970 PST
+ 594 | 4 | 00594 | Sun Apr 05 00:00:00 1970 PST
+ 596 | 6 | 00596 | Tue Apr 07 00:00:00 1970 PST
+ 597 | 407 | 00597_update7 | Wed Apr 08 00:00:00 1970 PST
+ 598 | 8 | 00598 | Thu Apr 09 00:00:00 1970 PST
+ 599 | 509 | 00599_update9 | Fri Apr 10 00:00:00 1970 PST
+ 600 | 0 | 00600 | Thu Jan 01 00:00:00 1970 PST
+ 601 | 1 | 00601 | Fri Jan 02 00:00:00 1970 PST
+ 603 | 303 | 00603_update3 | Sun Jan 04 00:00:00 1970 PST
+ 604 | 4 | 00604 | Mon Jan 05 00:00:00 1970 PST
+ 606 | 6 | 00606 | Wed Jan 07 00:00:00 1970 PST
+ 607 | 407 | 00607_update7 | Thu Jan 08 00:00:00 1970 PST
+ 608 | 8 | 00608 | Fri Jan 09 00:00:00 1970 PST
+ 609 | 509 | 00609_update9 | Sat Jan 10 00:00:00 1970 PST
+ 610 | 0 | 00610 | Sun Jan 11 00:00:00 1970 PST
+ 611 | 1 | 00611 | Mon Jan 12 00:00:00 1970 PST
+ 613 | 303 | 00613_update3 | Wed Jan 14 00:00:00 1970 PST
+ 614 | 4 | 00614 | Thu Jan 15 00:00:00 1970 PST
+ 616 | 6 | 00616 | Sat Jan 17 00:00:00 1970 PST
+ 617 | 407 | 00617_update7 | Sun Jan 18 00:00:00 1970 PST
+ 618 | 8 | 00618 | Mon Jan 19 00:00:00 1970 PST
+ 619 | 509 | 00619_update9 | Tue Jan 20 00:00:00 1970 PST
+ 620 | 0 | 00620 | Wed Jan 21 00:00:00 1970 PST
+ 621 | 1 | 00621 | Thu Jan 22 00:00:00 1970 PST
+ 623 | 303 | 00623_update3 | Sat Jan 24 00:00:00 1970 PST
+ 624 | 4 | 00624 | Sun Jan 25 00:00:00 1970 PST
+ 626 | 6 | 00626 | Tue Jan 27 00:00:00 1970 PST
+ 627 | 407 | 00627_update7 | Wed Jan 28 00:00:00 1970 PST
+ 628 | 8 | 00628 | Thu Jan 29 00:00:00 1970 PST
+ 629 | 509 | 00629_update9 | Fri Jan 30 00:00:00 1970 PST
+ 630 | 0 | 00630 | Sat Jan 31 00:00:00 1970 PST
+ 631 | 1 | 00631 | Sun Feb 01 00:00:00 1970 PST
+ 633 | 303 | 00633_update3 | Tue Feb 03 00:00:00 1970 PST
+ 634 | 4 | 00634 | Wed Feb 04 00:00:00 1970 PST
+ 636 | 6 | 00636 | Fri Feb 06 00:00:00 1970 PST
+ 637 | 407 | 00637_update7 | Sat Feb 07 00:00:00 1970 PST
+ 638 | 8 | 00638 | Sun Feb 08 00:00:00 1970 PST
+ 639 | 509 | 00639_update9 | Mon Feb 09 00:00:00 1970 PST
+ 640 | 0 | 00640 | Tue Feb 10 00:00:00 1970 PST
+ 641 | 1 | 00641 | Wed Feb 11 00:00:00 1970 PST
+ 643 | 303 | 00643_update3 | Fri Feb 13 00:00:00 1970 PST
+ 644 | 4 | 00644 | Sat Feb 14 00:00:00 1970 PST
+ 646 | 6 | 00646 | Mon Feb 16 00:00:00 1970 PST
+ 647 | 407 | 00647_update7 | Tue Feb 17 00:00:00 1970 PST
+ 648 | 8 | 00648 | Wed Feb 18 00:00:00 1970 PST
+ 649 | 509 | 00649_update9 | Thu Feb 19 00:00:00 1970 PST
+ 650 | 0 | 00650 | Fri Feb 20 00:00:00 1970 PST
+ 651 | 1 | 00651 | Sat Feb 21 00:00:00 1970 PST
+ 653 | 303 | 00653_update3 | Mon Feb 23 00:00:00 1970 PST
+ 654 | 4 | 00654 | Tue Feb 24 00:00:00 1970 PST
+ 656 | 6 | 00656 | Thu Feb 26 00:00:00 1970 PST
+ 657 | 407 | 00657_update7 | Fri Feb 27 00:00:00 1970 PST
+ 658 | 8 | 00658 | Sat Feb 28 00:00:00 1970 PST
+ 659 | 509 | 00659_update9 | Sun Mar 01 00:00:00 1970 PST
+ 660 | 0 | 00660 | Mon Mar 02 00:00:00 1970 PST
+ 661 | 1 | 00661 | Tue Mar 03 00:00:00 1970 PST
+ 663 | 303 | 00663_update3 | Thu Mar 05 00:00:00 1970 PST
+ 664 | 4 | 00664 | Fri Mar 06 00:00:00 1970 PST
+ 666 | 6 | 00666 | Sun Mar 08 00:00:00 1970 PST
+ 667 | 407 | 00667_update7 | Mon Mar 09 00:00:00 1970 PST
+ 668 | 8 | 00668 | Tue Mar 10 00:00:00 1970 PST
+ 669 | 509 | 00669_update9 | Wed Mar 11 00:00:00 1970 PST
+ 670 | 0 | 00670 | Thu Mar 12 00:00:00 1970 PST
+ 671 | 1 | 00671 | Fri Mar 13 00:00:00 1970 PST
+ 673 | 303 | 00673_update3 | Sun Mar 15 00:00:00 1970 PST
+ 674 | 4 | 00674 | Mon Mar 16 00:00:00 1970 PST
+ 676 | 6 | 00676 | Wed Mar 18 00:00:00 1970 PST
+ 677 | 407 | 00677_update7 | Thu Mar 19 00:00:00 1970 PST
+ 678 | 8 | 00678 | Fri Mar 20 00:00:00 1970 PST
+ 679 | 509 | 00679_update9 | Sat Mar 21 00:00:00 1970 PST
+ 680 | 0 | 00680 | Sun Mar 22 00:00:00 1970 PST
+ 681 | 1 | 00681 | Mon Mar 23 00:00:00 1970 PST
+ 683 | 303 | 00683_update3 | Wed Mar 25 00:00:00 1970 PST
+ 684 | 4 | 00684 | Thu Mar 26 00:00:00 1970 PST
+ 686 | 6 | 00686 | Sat Mar 28 00:00:00 1970 PST
+ 687 | 407 | 00687_update7 | Sun Mar 29 00:00:00 1970 PST
+ 688 | 8 | 00688 | Mon Mar 30 00:00:00 1970 PST
+ 689 | 509 | 00689_update9 | Tue Mar 31 00:00:00 1970 PST
+ 690 | 0 | 00690 | Wed Apr 01 00:00:00 1970 PST
+ 691 | 1 | 00691 | Thu Apr 02 00:00:00 1970 PST
+ 693 | 303 | 00693_update3 | Sat Apr 04 00:00:00 1970 PST
+ 694 | 4 | 00694 | Sun Apr 05 00:00:00 1970 PST
+ 696 | 6 | 00696 | Tue Apr 07 00:00:00 1970 PST
+ 697 | 407 | 00697_update7 | Wed Apr 08 00:00:00 1970 PST
+ 698 | 8 | 00698 | Thu Apr 09 00:00:00 1970 PST
+ 699 | 509 | 00699_update9 | Fri Apr 10 00:00:00 1970 PST
+ 700 | 0 | 00700 | Thu Jan 01 00:00:00 1970 PST
+ 701 | 1 | 00701 | Fri Jan 02 00:00:00 1970 PST
+ 703 | 303 | 00703_update3 | Sun Jan 04 00:00:00 1970 PST
+ 704 | 4 | 00704 | Mon Jan 05 00:00:00 1970 PST
+ 706 | 6 | 00706 | Wed Jan 07 00:00:00 1970 PST
+ 707 | 407 | 00707_update7 | Thu Jan 08 00:00:00 1970 PST
+ 708 | 8 | 00708 | Fri Jan 09 00:00:00 1970 PST
+ 709 | 509 | 00709_update9 | Sat Jan 10 00:00:00 1970 PST
+ 710 | 0 | 00710 | Sun Jan 11 00:00:00 1970 PST
+ 711 | 1 | 00711 | Mon Jan 12 00:00:00 1970 PST
+ 713 | 303 | 00713_update3 | Wed Jan 14 00:00:00 1970 PST
+ 714 | 4 | 00714 | Thu Jan 15 00:00:00 1970 PST
+ 716 | 6 | 00716 | Sat Jan 17 00:00:00 1970 PST
+ 717 | 407 | 00717_update7 | Sun Jan 18 00:00:00 1970 PST
+ 718 | 8 | 00718 | Mon Jan 19 00:00:00 1970 PST
+ 719 | 509 | 00719_update9 | Tue Jan 20 00:00:00 1970 PST
+ 720 | 0 | 00720 | Wed Jan 21 00:00:00 1970 PST
+ 721 | 1 | 00721 | Thu Jan 22 00:00:00 1970 PST
+ 723 | 303 | 00723_update3 | Sat Jan 24 00:00:00 1970 PST
+ 724 | 4 | 00724 | Sun Jan 25 00:00:00 1970 PST
+ 726 | 6 | 00726 | Tue Jan 27 00:00:00 1970 PST
+ 727 | 407 | 00727_update7 | Wed Jan 28 00:00:00 1970 PST
+ 728 | 8 | 00728 | Thu Jan 29 00:00:00 1970 PST
+ 729 | 509 | 00729_update9 | Fri Jan 30 00:00:00 1970 PST
+ 730 | 0 | 00730 | Sat Jan 31 00:00:00 1970 PST
+ 731 | 1 | 00731 | Sun Feb 01 00:00:00 1970 PST
+ 733 | 303 | 00733_update3 | Tue Feb 03 00:00:00 1970 PST
+ 734 | 4 | 00734 | Wed Feb 04 00:00:00 1970 PST
+ 736 | 6 | 00736 | Fri Feb 06 00:00:00 1970 PST
+ 737 | 407 | 00737_update7 | Sat Feb 07 00:00:00 1970 PST
+ 738 | 8 | 00738 | Sun Feb 08 00:00:00 1970 PST
+ 739 | 509 | 00739_update9 | Mon Feb 09 00:00:00 1970 PST
+ 740 | 0 | 00740 | Tue Feb 10 00:00:00 1970 PST
+ 741 | 1 | 00741 | Wed Feb 11 00:00:00 1970 PST
+ 743 | 303 | 00743_update3 | Fri Feb 13 00:00:00 1970 PST
+ 744 | 4 | 00744 | Sat Feb 14 00:00:00 1970 PST
+ 746 | 6 | 00746 | Mon Feb 16 00:00:00 1970 PST
+ 747 | 407 | 00747_update7 | Tue Feb 17 00:00:00 1970 PST
+ 748 | 8 | 00748 | Wed Feb 18 00:00:00 1970 PST
+ 749 | 509 | 00749_update9 | Thu Feb 19 00:00:00 1970 PST
+ 750 | 0 | 00750 | Fri Feb 20 00:00:00 1970 PST
+ 751 | 1 | 00751 | Sat Feb 21 00:00:00 1970 PST
+ 753 | 303 | 00753_update3 | Mon Feb 23 00:00:00 1970 PST
+ 754 | 4 | 00754 | Tue Feb 24 00:00:00 1970 PST
+ 756 | 6 | 00756 | Thu Feb 26 00:00:00 1970 PST
+ 757 | 407 | 00757_update7 | Fri Feb 27 00:00:00 1970 PST
+ 758 | 8 | 00758 | Sat Feb 28 00:00:00 1970 PST
+ 759 | 509 | 00759_update9 | Sun Mar 01 00:00:00 1970 PST
+ 760 | 0 | 00760 | Mon Mar 02 00:00:00 1970 PST
+ 761 | 1 | 00761 | Tue Mar 03 00:00:00 1970 PST
+ 763 | 303 | 00763_update3 | Thu Mar 05 00:00:00 1970 PST
+ 764 | 4 | 00764 | Fri Mar 06 00:00:00 1970 PST
+ 766 | 6 | 00766 | Sun Mar 08 00:00:00 1970 PST
+ 767 | 407 | 00767_update7 | Mon Mar 09 00:00:00 1970 PST
+ 768 | 8 | 00768 | Tue Mar 10 00:00:00 1970 PST
+ 769 | 509 | 00769_update9 | Wed Mar 11 00:00:00 1970 PST
+ 770 | 0 | 00770 | Thu Mar 12 00:00:00 1970 PST
+ 771 | 1 | 00771 | Fri Mar 13 00:00:00 1970 PST
+ 773 | 303 | 00773_update3 | Sun Mar 15 00:00:00 1970 PST
+ 774 | 4 | 00774 | Mon Mar 16 00:00:00 1970 PST
+ 776 | 6 | 00776 | Wed Mar 18 00:00:00 1970 PST
+ 777 | 407 | 00777_update7 | Thu Mar 19 00:00:00 1970 PST
+ 778 | 8 | 00778 | Fri Mar 20 00:00:00 1970 PST
+ 779 | 509 | 00779_update9 | Sat Mar 21 00:00:00 1970 PST
+ 780 | 0 | 00780 | Sun Mar 22 00:00:00 1970 PST
+ 781 | 1 | 00781 | Mon Mar 23 00:00:00 1970 PST
+ 783 | 303 | 00783_update3 | Wed Mar 25 00:00:00 1970 PST
+ 784 | 4 | 00784 | Thu Mar 26 00:00:00 1970 PST
+ 786 | 6 | 00786 | Sat Mar 28 00:00:00 1970 PST
+ 787 | 407 | 00787_update7 | Sun Mar 29 00:00:00 1970 PST
+ 788 | 8 | 00788 | Mon Mar 30 00:00:00 1970 PST
+ 789 | 509 | 00789_update9 | Tue Mar 31 00:00:00 1970 PST
+ 790 | 0 | 00790 | Wed Apr 01 00:00:00 1970 PST
+ 791 | 1 | 00791 | Thu Apr 02 00:00:00 1970 PST
+ 793 | 303 | 00793_update3 | Sat Apr 04 00:00:00 1970 PST
+ 794 | 4 | 00794 | Sun Apr 05 00:00:00 1970 PST
+ 796 | 6 | 00796 | Tue Apr 07 00:00:00 1970 PST
+ 797 | 407 | 00797_update7 | Wed Apr 08 00:00:00 1970 PST
+ 798 | 8 | 00798 | Thu Apr 09 00:00:00 1970 PST
+ 799 | 509 | 00799_update9 | Fri Apr 10 00:00:00 1970 PST
+ 800 | 0 | 00800 | Thu Jan 01 00:00:00 1970 PST
+ 801 | 1 | 00801 | Fri Jan 02 00:00:00 1970 PST
+ 803 | 303 | 00803_update3 | Sun Jan 04 00:00:00 1970 PST
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+ 806 | 6 | 00806 | Wed Jan 07 00:00:00 1970 PST
+ 807 | 407 | 00807_update7 | Thu Jan 08 00:00:00 1970 PST
+ 808 | 8 | 00808 | Fri Jan 09 00:00:00 1970 PST
+ 809 | 509 | 00809_update9 | Sat Jan 10 00:00:00 1970 PST
+ 810 | 0 | 00810 | Sun Jan 11 00:00:00 1970 PST
+ 811 | 1 | 00811 | Mon Jan 12 00:00:00 1970 PST
+ 813 | 303 | 00813_update3 | Wed Jan 14 00:00:00 1970 PST
+ 814 | 4 | 00814 | Thu Jan 15 00:00:00 1970 PST
+ 816 | 6 | 00816 | Sat Jan 17 00:00:00 1970 PST
+ 817 | 407 | 00817_update7 | Sun Jan 18 00:00:00 1970 PST
+ 818 | 8 | 00818 | Mon Jan 19 00:00:00 1970 PST
+ 819 | 509 | 00819_update9 | Tue Jan 20 00:00:00 1970 PST
+ 820 | 0 | 00820 | Wed Jan 21 00:00:00 1970 PST
+ 821 | 1 | 00821 | Thu Jan 22 00:00:00 1970 PST
+ 823 | 303 | 00823_update3 | Sat Jan 24 00:00:00 1970 PST
+ 824 | 4 | 00824 | Sun Jan 25 00:00:00 1970 PST
+ 826 | 6 | 00826 | Tue Jan 27 00:00:00 1970 PST
+ 827 | 407 | 00827_update7 | Wed Jan 28 00:00:00 1970 PST
+ 828 | 8 | 00828 | Thu Jan 29 00:00:00 1970 PST
+ 829 | 509 | 00829_update9 | Fri Jan 30 00:00:00 1970 PST
+ 830 | 0 | 00830 | Sat Jan 31 00:00:00 1970 PST
+ 831 | 1 | 00831 | Sun Feb 01 00:00:00 1970 PST
+ 833 | 303 | 00833_update3 | Tue Feb 03 00:00:00 1970 PST
+ 834 | 4 | 00834 | Wed Feb 04 00:00:00 1970 PST
+ 836 | 6 | 00836 | Fri Feb 06 00:00:00 1970 PST
+ 837 | 407 | 00837_update7 | Sat Feb 07 00:00:00 1970 PST
+ 838 | 8 | 00838 | Sun Feb 08 00:00:00 1970 PST
+ 839 | 509 | 00839_update9 | Mon Feb 09 00:00:00 1970 PST
+ 840 | 0 | 00840 | Tue Feb 10 00:00:00 1970 PST
+ 841 | 1 | 00841 | Wed Feb 11 00:00:00 1970 PST
+ 843 | 303 | 00843_update3 | Fri Feb 13 00:00:00 1970 PST
+ 844 | 4 | 00844 | Sat Feb 14 00:00:00 1970 PST
+ 846 | 6 | 00846 | Mon Feb 16 00:00:00 1970 PST
+ 847 | 407 | 00847_update7 | Tue Feb 17 00:00:00 1970 PST
+ 848 | 8 | 00848 | Wed Feb 18 00:00:00 1970 PST
+ 849 | 509 | 00849_update9 | Thu Feb 19 00:00:00 1970 PST
+ 850 | 0 | 00850 | Fri Feb 20 00:00:00 1970 PST
+ 851 | 1 | 00851 | Sat Feb 21 00:00:00 1970 PST
+ 853 | 303 | 00853_update3 | Mon Feb 23 00:00:00 1970 PST
+ 854 | 4 | 00854 | Tue Feb 24 00:00:00 1970 PST
+ 856 | 6 | 00856 | Thu Feb 26 00:00:00 1970 PST
+ 857 | 407 | 00857_update7 | Fri Feb 27 00:00:00 1970 PST
+ 858 | 8 | 00858 | Sat Feb 28 00:00:00 1970 PST
+ 859 | 509 | 00859_update9 | Sun Mar 01 00:00:00 1970 PST
+ 860 | 0 | 00860 | Mon Mar 02 00:00:00 1970 PST
+ 861 | 1 | 00861 | Tue Mar 03 00:00:00 1970 PST
+ 863 | 303 | 00863_update3 | Thu Mar 05 00:00:00 1970 PST
+ 864 | 4 | 00864 | Fri Mar 06 00:00:00 1970 PST
+ 866 | 6 | 00866 | Sun Mar 08 00:00:00 1970 PST
+ 867 | 407 | 00867_update7 | Mon Mar 09 00:00:00 1970 PST
+ 868 | 8 | 00868 | Tue Mar 10 00:00:00 1970 PST
+ 869 | 509 | 00869_update9 | Wed Mar 11 00:00:00 1970 PST
+ 870 | 0 | 00870 | Thu Mar 12 00:00:00 1970 PST
+ 871 | 1 | 00871 | Fri Mar 13 00:00:00 1970 PST
+ 873 | 303 | 00873_update3 | Sun Mar 15 00:00:00 1970 PST
+ 874 | 4 | 00874 | Mon Mar 16 00:00:00 1970 PST
+ 876 | 6 | 00876 | Wed Mar 18 00:00:00 1970 PST
+ 877 | 407 | 00877_update7 | Thu Mar 19 00:00:00 1970 PST
+ 878 | 8 | 00878 | Fri Mar 20 00:00:00 1970 PST
+ 879 | 509 | 00879_update9 | Sat Mar 21 00:00:00 1970 PST
+ 880 | 0 | 00880 | Sun Mar 22 00:00:00 1970 PST
+ 881 | 1 | 00881 | Mon Mar 23 00:00:00 1970 PST
+ 883 | 303 | 00883_update3 | Wed Mar 25 00:00:00 1970 PST
+ 884 | 4 | 00884 | Thu Mar 26 00:00:00 1970 PST
+ 886 | 6 | 00886 | Sat Mar 28 00:00:00 1970 PST
+ 887 | 407 | 00887_update7 | Sun Mar 29 00:00:00 1970 PST
+ 888 | 8 | 00888 | Mon Mar 30 00:00:00 1970 PST
+ 889 | 509 | 00889_update9 | Tue Mar 31 00:00:00 1970 PST
+ 890 | 0 | 00890 | Wed Apr 01 00:00:00 1970 PST
+ 891 | 1 | 00891 | Thu Apr 02 00:00:00 1970 PST
+ 893 | 303 | 00893_update3 | Sat Apr 04 00:00:00 1970 PST
+ 894 | 4 | 00894 | Sun Apr 05 00:00:00 1970 PST
+ 896 | 6 | 00896 | Tue Apr 07 00:00:00 1970 PST
+ 897 | 407 | 00897_update7 | Wed Apr 08 00:00:00 1970 PST
+ 898 | 8 | 00898 | Thu Apr 09 00:00:00 1970 PST
+ 899 | 509 | 00899_update9 | Fri Apr 10 00:00:00 1970 PST
+ 900 | 0 | 00900 | Thu Jan 01 00:00:00 1970 PST
+ 901 | 1 | 00901 | Fri Jan 02 00:00:00 1970 PST
+ 903 | 303 | 00903_update3 | Sun Jan 04 00:00:00 1970 PST
+ 904 | 4 | 00904 | Mon Jan 05 00:00:00 1970 PST
+ 906 | 6 | 00906 | Wed Jan 07 00:00:00 1970 PST
+ 907 | 407 | 00907_update7 | Thu Jan 08 00:00:00 1970 PST
+ 908 | 8 | 00908 | Fri Jan 09 00:00:00 1970 PST
+ 909 | 509 | 00909_update9 | Sat Jan 10 00:00:00 1970 PST
+ 910 | 0 | 00910 | Sun Jan 11 00:00:00 1970 PST
+ 911 | 1 | 00911 | Mon Jan 12 00:00:00 1970 PST
+ 913 | 303 | 00913_update3 | Wed Jan 14 00:00:00 1970 PST
+ 914 | 4 | 00914 | Thu Jan 15 00:00:00 1970 PST
+ 916 | 6 | 00916 | Sat Jan 17 00:00:00 1970 PST
+ 917 | 407 | 00917_update7 | Sun Jan 18 00:00:00 1970 PST
+ 918 | 8 | 00918 | Mon Jan 19 00:00:00 1970 PST
+ 919 | 509 | 00919_update9 | Tue Jan 20 00:00:00 1970 PST
+ 920 | 0 | 00920 | Wed Jan 21 00:00:00 1970 PST
+ 921 | 1 | 00921 | Thu Jan 22 00:00:00 1970 PST
+ 923 | 303 | 00923_update3 | Sat Jan 24 00:00:00 1970 PST
+ 924 | 4 | 00924 | Sun Jan 25 00:00:00 1970 PST
+ 926 | 6 | 00926 | Tue Jan 27 00:00:00 1970 PST
+ 927 | 407 | 00927_update7 | Wed Jan 28 00:00:00 1970 PST
+ 928 | 8 | 00928 | Thu Jan 29 00:00:00 1970 PST
+ 929 | 509 | 00929_update9 | Fri Jan 30 00:00:00 1970 PST
+ 930 | 0 | 00930 | Sat Jan 31 00:00:00 1970 PST
+ 931 | 1 | 00931 | Sun Feb 01 00:00:00 1970 PST
+ 933 | 303 | 00933_update3 | Tue Feb 03 00:00:00 1970 PST
+ 934 | 4 | 00934 | Wed Feb 04 00:00:00 1970 PST
+ 936 | 6 | 00936 | Fri Feb 06 00:00:00 1970 PST
+ 937 | 407 | 00937_update7 | Sat Feb 07 00:00:00 1970 PST
+ 938 | 8 | 00938 | Sun Feb 08 00:00:00 1970 PST
+ 939 | 509 | 00939_update9 | Mon Feb 09 00:00:00 1970 PST
+ 940 | 0 | 00940 | Tue Feb 10 00:00:00 1970 PST
+ 941 | 1 | 00941 | Wed Feb 11 00:00:00 1970 PST
+ 943 | 303 | 00943_update3 | Fri Feb 13 00:00:00 1970 PST
+ 944 | 4 | 00944 | Sat Feb 14 00:00:00 1970 PST
+ 946 | 6 | 00946 | Mon Feb 16 00:00:00 1970 PST
+ 947 | 407 | 00947_update7 | Tue Feb 17 00:00:00 1970 PST
+ 948 | 8 | 00948 | Wed Feb 18 00:00:00 1970 PST
+ 949 | 509 | 00949_update9 | Thu Feb 19 00:00:00 1970 PST
+ 950 | 0 | 00950 | Fri Feb 20 00:00:00 1970 PST
+ 951 | 1 | 00951 | Sat Feb 21 00:00:00 1970 PST
+ 953 | 303 | 00953_update3 | Mon Feb 23 00:00:00 1970 PST
+ 954 | 4 | 00954 | Tue Feb 24 00:00:00 1970 PST
+ 956 | 6 | 00956 | Thu Feb 26 00:00:00 1970 PST
+ 957 | 407 | 00957_update7 | Fri Feb 27 00:00:00 1970 PST
+ 958 | 8 | 00958 | Sat Feb 28 00:00:00 1970 PST
+ 959 | 509 | 00959_update9 | Sun Mar 01 00:00:00 1970 PST
+ 960 | 0 | 00960 | Mon Mar 02 00:00:00 1970 PST
+ 961 | 1 | 00961 | Tue Mar 03 00:00:00 1970 PST
+ 963 | 303 | 00963_update3 | Thu Mar 05 00:00:00 1970 PST
+ 964 | 4 | 00964 | Fri Mar 06 00:00:00 1970 PST
+ 966 | 6 | 00966 | Sun Mar 08 00:00:00 1970 PST
+ 967 | 407 | 00967_update7 | Mon Mar 09 00:00:00 1970 PST
+ 968 | 8 | 00968 | Tue Mar 10 00:00:00 1970 PST
+ 969 | 509 | 00969_update9 | Wed Mar 11 00:00:00 1970 PST
+ 970 | 0 | 00970 | Thu Mar 12 00:00:00 1970 PST
+ 971 | 1 | 00971 | Fri Mar 13 00:00:00 1970 PST
+ 973 | 303 | 00973_update3 | Sun Mar 15 00:00:00 1970 PST
+ 974 | 4 | 00974 | Mon Mar 16 00:00:00 1970 PST
+ 976 | 6 | 00976 | Wed Mar 18 00:00:00 1970 PST
+ 977 | 407 | 00977_update7 | Thu Mar 19 00:00:00 1970 PST
+ 978 | 8 | 00978 | Fri Mar 20 00:00:00 1970 PST
+ 979 | 509 | 00979_update9 | Sat Mar 21 00:00:00 1970 PST
+ 980 | 0 | 00980 | Sun Mar 22 00:00:00 1970 PST
+ 981 | 1 | 00981 | Mon Mar 23 00:00:00 1970 PST
+ 983 | 303 | 00983_update3 | Wed Mar 25 00:00:00 1970 PST
+ 984 | 4 | 00984 | Thu Mar 26 00:00:00 1970 PST
+ 986 | 6 | 00986 | Sat Mar 28 00:00:00 1970 PST
+ 987 | 407 | 00987_update7 | Sun Mar 29 00:00:00 1970 PST
+ 988 | 8 | 00988 | Mon Mar 30 00:00:00 1970 PST
+ 989 | 509 | 00989_update9 | Tue Mar 31 00:00:00 1970 PST
+ 990 | 0 | 00990 | Wed Apr 01 00:00:00 1970 PST
+ 991 | 1 | 00991 | Thu Apr 02 00:00:00 1970 PST
+ 993 | 303 | 00993_update3 | Sat Apr 04 00:00:00 1970 PST
+ 994 | 4 | 00994 | Sun Apr 05 00:00:00 1970 PST
+ 996 | 6 | 00996 | Tue Apr 07 00:00:00 1970 PST
+ 997 | 407 | 00997_update7 | Wed Apr 08 00:00:00 1970 PST
+ 998 | 8 | 00998 | Thu Apr 09 00:00:00 1970 PST
+ 999 | 509 | 00999_update9 | Fri Apr 10 00:00:00 1970 PST
+ 1000 | 0 | 01000 | Thu Jan 01 00:00:00 1970 PST
+ 1001 | 101 | 0000100001 |
+ 1003 | 403 | 0000300003_update3 |
+ 1004 | 104 | 0000400004 |
+ 1006 | 106 | 0000600006 |
+ 1007 | 507 | 0000700007_update7 |
+ 1008 | 108 | 0000800008 |
+ 1009 | 609 | 0000900009_update9 |
+ 1010 | 100 | 0001000010 |
+ 1011 | 101 | 0001100011 |
+ 1013 | 403 | 0001300013_update3 |
+ 1014 | 104 | 0001400014 |
+ 1016 | 106 | 0001600016 |
+ 1017 | 507 | 0001700017_update7 |
+ 1018 | 108 | 0001800018 |
+ 1019 | 609 | 0001900019_update9 |
+ 1020 | 100 | 0002000020 |
+ 1101 | 201 | aaa |
+ 1103 | 503 | ccc_update3 |
+ 1104 | 204 | ddd |
+(819 rows)
+
+-- Test that defaults and triggers on remote table work as expected
+ALTER TABLE "S 1"."T 1" ALTER c6 SET DEFAULT '(^-^;)';
+CREATE OR REPLACE FUNCTION "S 1".F_BRTRIG() RETURNS trigger AS $$
+BEGIN
+ NEW.c3 = NEW.c3 || '_trig_update';
+ RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+CREATE TRIGGER t1_br_insert BEFORE INSERT OR UPDATE
+ ON "S 1"."T 1" FOR EACH ROW EXECUTE PROCEDURE "S 1".F_BRTRIG();
+INSERT INTO ft2 (c1,c2,c3) VALUES (1208, 218, 'fff') RETURNING *;
+ c1 | c2 | c3 | c4 | c5 | c6 | c7 | c8
+------+-----+-----------------+----+----+--------+----+----
+ 1208 | 218 | fff_trig_update | | | (^-^;) | |
+(1 row)
+
+INSERT INTO ft2 (c1,c2,c3,c6) VALUES (1218, 218, 'ggg', '(--;') RETURNING *;
+ c1 | c2 | c3 | c4 | c5 | c6 | c7 | c8
+------+-----+-----------------+----+----+------+----+----
+ 1218 | 218 | ggg_trig_update | | | (--; | |
+(1 row)
+
+UPDATE ft2 SET c2 = c2 + 600 WHERE c1 % 10 = 8 RETURNING *;
+ c1 | c2 | c3 | c4 | c5 | c6 | c7 | c8
+------+-----+-----------------------------+------------------------------+--------------------------+--------+------------+-----
+ 8 | 608 | 00008_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 18 | 608 | 00018_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 28 | 608 | 00028_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 38 | 608 | 00038_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 48 | 608 | 00048_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 58 | 608 | 00058_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 68 | 608 | 00068_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 78 | 608 | 00078_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 88 | 608 | 00088_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 98 | 608 | 00098_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 108 | 608 | 00108_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 118 | 608 | 00118_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 128 | 608 | 00128_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 138 | 608 | 00138_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 148 | 608 | 00148_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 158 | 608 | 00158_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 168 | 608 | 00168_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 178 | 608 | 00178_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 188 | 608 | 00188_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 198 | 608 | 00198_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 208 | 608 | 00208_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 218 | 608 | 00218_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 228 | 608 | 00228_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 238 | 608 | 00238_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 248 | 608 | 00248_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 258 | 608 | 00258_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 268 | 608 | 00268_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 278 | 608 | 00278_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 288 | 608 | 00288_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 298 | 608 | 00298_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 308 | 608 | 00308_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 318 | 608 | 00318_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 328 | 608 | 00328_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 338 | 608 | 00338_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 348 | 608 | 00348_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 358 | 608 | 00358_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 368 | 608 | 00368_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 378 | 608 | 00378_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 388 | 608 | 00388_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 398 | 608 | 00398_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 408 | 608 | 00408_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 418 | 608 | 00418_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 428 | 608 | 00428_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 438 | 608 | 00438_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 448 | 608 | 00448_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 458 | 608 | 00458_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 468 | 608 | 00468_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 478 | 608 | 00478_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 488 | 608 | 00488_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 498 | 608 | 00498_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 508 | 608 | 00508_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 518 | 608 | 00518_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 528 | 608 | 00528_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 538 | 608 | 00538_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 548 | 608 | 00548_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 558 | 608 | 00558_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 568 | 608 | 00568_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 578 | 608 | 00578_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 588 | 608 | 00588_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 598 | 608 | 00598_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 608 | 608 | 00608_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 618 | 608 | 00618_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 628 | 608 | 00628_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 638 | 608 | 00638_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 648 | 608 | 00648_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 658 | 608 | 00658_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 668 | 608 | 00668_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 678 | 608 | 00678_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 688 | 608 | 00688_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 698 | 608 | 00698_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 708 | 608 | 00708_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 718 | 608 | 00718_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 728 | 608 | 00728_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 738 | 608 | 00738_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 748 | 608 | 00748_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 758 | 608 | 00758_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 768 | 608 | 00768_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 778 | 608 | 00778_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 788 | 608 | 00788_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 798 | 608 | 00798_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 808 | 608 | 00808_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 818 | 608 | 00818_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 828 | 608 | 00828_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 838 | 608 | 00838_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 848 | 608 | 00848_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 858 | 608 | 00858_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 868 | 608 | 00868_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 878 | 608 | 00878_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 888 | 608 | 00888_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 898 | 608 | 00898_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 908 | 608 | 00908_trig_update | Fri Jan 09 00:00:00 1970 PST | Fri Jan 09 00:00:00 1970 | 8 | 8 | foo
+ 918 | 608 | 00918_trig_update | Mon Jan 19 00:00:00 1970 PST | Mon Jan 19 00:00:00 1970 | 8 | 8 | foo
+ 928 | 608 | 00928_trig_update | Thu Jan 29 00:00:00 1970 PST | Thu Jan 29 00:00:00 1970 | 8 | 8 | foo
+ 938 | 608 | 00938_trig_update | Sun Feb 08 00:00:00 1970 PST | Sun Feb 08 00:00:00 1970 | 8 | 8 | foo
+ 948 | 608 | 00948_trig_update | Wed Feb 18 00:00:00 1970 PST | Wed Feb 18 00:00:00 1970 | 8 | 8 | foo
+ 958 | 608 | 00958_trig_update | Sat Feb 28 00:00:00 1970 PST | Sat Feb 28 00:00:00 1970 | 8 | 8 | foo
+ 968 | 608 | 00968_trig_update | Tue Mar 10 00:00:00 1970 PST | Tue Mar 10 00:00:00 1970 | 8 | 8 | foo
+ 978 | 608 | 00978_trig_update | Fri Mar 20 00:00:00 1970 PST | Fri Mar 20 00:00:00 1970 | 8 | 8 | foo
+ 988 | 608 | 00988_trig_update | Mon Mar 30 00:00:00 1970 PST | Mon Mar 30 00:00:00 1970 | 8 | 8 | foo
+ 998 | 608 | 00998_trig_update | Thu Apr 09 00:00:00 1970 PST | Thu Apr 09 00:00:00 1970 | 8 | 8 | foo
+ 1008 | 708 | 0000800008_trig_update | | | | |
+ 1018 | 708 | 0001800018_trig_update | | | | |
+ 1208 | 818 | fff_trig_update_trig_update | | | (^-^;) | |
+ 1218 | 818 | ggg_trig_update_trig_update | | | (--; | |
+(104 rows)
+
+-- Test errors thrown on remote side during update
+ALTER TABLE "S 1"."T 1" ADD CONSTRAINT c2positive CHECK (c2 >= 0);
+INSERT INTO ft1(c1, c2) VALUES(11, 12); -- duplicate key
+ERROR: duplicate key value violates unique constraint "t1_pkey"
+DETAIL: Key ("C 1")=(11) already exists.
+CONTEXT: Remote SQL command: INSERT INTO "S 1"."T 1"("C 1", c2) VALUES ($1, $2)
+INSERT INTO ft1(c1, c2) VALUES(1111, -2); -- c2positive
+ERROR: new row for relation "T 1" violates check constraint "c2positive"
+DETAIL: Failing row contains (1111, -2, null, null, null, (^-^;), null, null).
+CONTEXT: Remote SQL command: INSERT INTO "S 1"."T 1"("C 1", c2) VALUES ($1, $2)
+UPDATE ft1 SET c2 = -c2 WHERE c1 = 1; -- c2positive
+ERROR: new row for relation "T 1" violates check constraint "c2positive"
+DETAIL: Failing row contains (1, -1, 00001_trig_update, 1970-01-02 03:00:00-05, 1970-01-02 00:00:00, 1, 1 , foo).
+CONTEXT: Remote SQL command: UPDATE "S 1"."T 1" SET c2 = $2 WHERE ctid = $1
+-- Test savepoint/rollback behavior
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 0 | 100
+ 1 | 100
+ 4 | 100
+ 6 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 0 | 100
+ 1 | 100
+ 4 | 100
+ 6 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+begin;
+update ft2 set c2 = 42 where c2 = 0;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 4 | 100
+ 6 | 100
+ 42 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+savepoint s1;
+update ft2 set c2 = 44 where c2 = 4;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+release savepoint s1;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+savepoint s2;
+update ft2 set c2 = 46 where c2 = 6;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 42 | 100
+ 44 | 100
+ 46 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+rollback to savepoint s2;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+release savepoint s2;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+savepoint s3;
+update ft2 set c2 = -2 where c2 = 42; -- fail on remote side
+ERROR: new row for relation "T 1" violates check constraint "c2positive"
+DETAIL: Failing row contains (10, -2, 00010_trig_update_trig_update, 1970-01-11 03:00:00-05, 1970-01-11 00:00:00, 0, 0 , foo).
+CONTEXT: Remote SQL command: UPDATE "S 1"."T 1" SET c2 = $2 WHERE ctid = $1
+rollback to savepoint s3;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+release savepoint s3;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+-- none of the above is committed yet remotely
+select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 0 | 100
+ 1 | 100
+ 4 | 100
+ 6 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+commit;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
+select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
+ c2 | count
+-----+-------
+ 1 | 100
+ 6 | 100
+ 42 | 100
+ 44 | 100
+ 100 | 2
+ 101 | 2
+ 104 | 2
+ 106 | 2
+ 201 | 1
+ 204 | 1
+ 303 | 100
+ 403 | 2
+ 407 | 100
+(13 rows)
+
#include "postgres_fdw.h"
#include "access/htup_details.h"
+#include "access/sysattr.h"
#include "commands/defrem.h"
#include "commands/explain.h"
#include "commands/vacuum.h"
#include "foreign/fdwapi.h"
#include "funcapi.h"
#include "miscadmin.h"
+#include "nodes/makefuncs.h"
#include "optimizer/cost.h"
#include "optimizer/pathnode.h"
#include "optimizer/planmain.h"
+#include "optimizer/prep.h"
+#include "optimizer/var.h"
#include "parser/parsetree.h"
+#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
} PgFdwRelationInfo;
/*
- * Indexes of FDW-private information stored in fdw_private list.
+ * Indexes of FDW-private information stored in fdw_private lists.
*
* We store various information in ForeignScan.fdw_private to pass it from
* planner to executor. Specifically there is:
* 1) SELECT statement text to be sent to the remote server
* 2) IDs of PARAM_EXEC Params used in the SELECT statement
*
- * These items are indexed with the enum FdwPrivateIndex, so an item can be
- * fetched with list_nth(). For example, to get the SELECT statement:
- * sql = strVal(list_nth(fdw_private, FdwPrivateSelectSql));
+ * These items are indexed with the enum FdwScanPrivateIndex, so an item
+ * can be fetched with list_nth(). For example, to get the SELECT statement:
+ * sql = strVal(list_nth(fdw_private, FdwScanPrivateSelectSql));
*/
-enum FdwPrivateIndex
+enum FdwScanPrivateIndex
{
/* SQL statement to execute remotely (as a String node) */
- FdwPrivateSelectSql,
-
+ FdwScanPrivateSelectSql,
/* Integer list of param IDs of PARAM_EXEC Params used in SQL stmt */
- FdwPrivateExternParamIds,
+ FdwScanPrivateExternParamIds
+};
- /* # of elements stored in the list fdw_private */
- FdwPrivateNum
+/*
+ * Similarly, this enum describes what's kept in the fdw_private list for
+ * a ModifyTable node referencing a postgres_fdw foreign table. We store:
+ *
+ * 1) INSERT/UPDATE/DELETE statement text to be sent to the remote server
+ * 2) Integer list of target attribute numbers for INSERT/UPDATE
+ * (NIL for a DELETE)
+ * 3) Boolean flag showing if there's a RETURNING clause
+ */
+enum FdwModifyPrivateIndex
+{
+ /* SQL statement to execute remotely (as a String node) */
+ FdwModifyPrivateUpdateSql,
+ /* Integer list of target attribute numbers for INSERT/UPDATE */
+ FdwModifyPrivateTargetAttnums,
+ /* has-returning flag (as an integer Value node) */
+ FdwModifyPrivateHasReturning
};
/*
* Execution state of a foreign scan using postgres_fdw.
*/
-typedef struct PgFdwExecutionState
+typedef struct PgFdwScanState
{
Relation rel; /* relcache entry for the foreign table */
AttInMetadata *attinmeta; /* attribute datatype conversion metadata */
/* working memory contexts */
MemoryContext batch_cxt; /* context holding current batch of tuples */
MemoryContext temp_cxt; /* context for per-tuple temporary data */
-} PgFdwExecutionState;
+} PgFdwScanState;
+
+/*
+ * Execution state of a foreign insert/update/delete operation.
+ */
+typedef struct PgFdwModifyState
+{
+ Relation rel; /* relcache entry for the foreign table */
+ AttInMetadata *attinmeta; /* attribute datatype conversion metadata */
+
+ /* for remote query execution */
+ PGconn *conn; /* connection for the scan */
+ char *p_name; /* name of prepared statement, if created */
+
+ /* extracted fdw_private data */
+ char *query; /* text of INSERT/UPDATE/DELETE command */
+ List *target_attrs; /* list of target attribute numbers */
+ bool has_returning; /* is there a RETURNING clause? */
+
+ /* info about parameters for prepared statement */
+ AttrNumber ctidAttno; /* attnum of input resjunk ctid column */
+ int p_nums; /* number of parameters to transmit */
+ FmgrInfo *p_flinfo; /* output conversion functions for them */
+
+ /* working memory context */
+ MemoryContext temp_cxt; /* context for per-tuple temporary data */
+} PgFdwModifyState;
/*
* Workspace for analyzing a foreign table.
ForeignPath *best_path,
List *tlist,
List *scan_clauses);
-static void postgresExplainForeignScan(ForeignScanState *node,
- ExplainState *es);
static void postgresBeginForeignScan(ForeignScanState *node, int eflags);
static TupleTableSlot *postgresIterateForeignScan(ForeignScanState *node);
static void postgresReScanForeignScan(ForeignScanState *node);
static void postgresEndForeignScan(ForeignScanState *node);
+static void postgresAddForeignUpdateTargets(Query *parsetree,
+ RangeTblEntry *target_rte,
+ Relation target_relation);
+static List *postgresPlanForeignModify(PlannerInfo *root,
+ ModifyTable *plan,
+ Index resultRelation,
+ int subplan_index);
+static void postgresBeginForeignModify(ModifyTableState *mtstate,
+ ResultRelInfo *resultRelInfo,
+ List *fdw_private,
+ int subplan_index,
+ int eflags);
+static TupleTableSlot *postgresExecForeignInsert(EState *estate,
+ ResultRelInfo *resultRelInfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+static TupleTableSlot *postgresExecForeignUpdate(EState *estate,
+ ResultRelInfo *resultRelInfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+static TupleTableSlot *postgresExecForeignDelete(EState *estate,
+ ResultRelInfo *resultRelInfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+static void postgresEndForeignModify(EState *estate,
+ ResultRelInfo *resultRelInfo);
+static void postgresExplainForeignScan(ForeignScanState *node,
+ ExplainState *es);
+static void postgresExplainForeignModify(ModifyTableState *mtstate,
+ ResultRelInfo *rinfo,
+ List *fdw_private,
+ int subplan_index,
+ ExplainState *es);
static bool postgresAnalyzeForeignTable(Relation relation,
AcquireSampleRowsFunc *func,
BlockNumber *totalpages);
static void create_cursor(ForeignScanState *node);
static void fetch_more_data(ForeignScanState *node);
static void close_cursor(PGconn *conn, unsigned int cursor_number);
+static void prepare_foreign_modify(PgFdwModifyState *fmstate);
+static const char **convert_prep_stmt_params(PgFdwModifyState *fmstate,
+ ItemPointer tupleid,
+ TupleTableSlot *slot);
+static void store_returning_result(PgFdwModifyState *fmstate,
+ TupleTableSlot *slot, PGresult *res);
static int postgresAcquireSampleRowsFunc(Relation relation, int elevel,
HeapTuple *rows, int targrows,
double *totalrows,
{
FdwRoutine *routine = makeNode(FdwRoutine);
- /* Required handler functions. */
+ /* Functions for scanning foreign tables */
routine->GetForeignRelSize = postgresGetForeignRelSize;
routine->GetForeignPaths = postgresGetForeignPaths;
routine->GetForeignPlan = postgresGetForeignPlan;
- routine->ExplainForeignScan = postgresExplainForeignScan;
routine->BeginForeignScan = postgresBeginForeignScan;
routine->IterateForeignScan = postgresIterateForeignScan;
routine->ReScanForeignScan = postgresReScanForeignScan;
routine->EndForeignScan = postgresEndForeignScan;
- /* Optional handler functions. */
+ /* Functions for updating foreign tables */
+ routine->AddForeignUpdateTargets = postgresAddForeignUpdateTargets;
+ routine->PlanForeignModify = postgresPlanForeignModify;
+ routine->BeginForeignModify = postgresBeginForeignModify;
+ routine->ExecForeignInsert = postgresExecForeignInsert;
+ routine->ExecForeignUpdate = postgresExecForeignUpdate;
+ routine->ExecForeignDelete = postgresExecForeignDelete;
+ routine->EndForeignModify = postgresEndForeignModify;
+
+ /* Support functions for EXPLAIN */
+ routine->ExplainForeignScan = postgresExplainForeignScan;
+ routine->ExplainForeignModify = postgresExplainForeignModify;
+
+ /* Support functions for ANALYZE */
routine->AnalyzeForeignTable = postgresAnalyzeForeignTable;
PG_RETURN_POINTER(routine);
Oid foreigntableid)
{
bool use_remote_estimate = false;
- ListCell *lc;
PgFdwRelationInfo *fpinfo;
StringInfo sql;
ForeignTable *table;
List *param_conds;
List *local_conds;
List *param_numbers;
+ Bitmapset *attrs_used;
+ ListCell *lc;
/*
* We use PgFdwRelationInfo to pass various information to subsequent
* functions.
*/
- fpinfo = palloc0(sizeof(PgFdwRelationInfo));
+ fpinfo = (PgFdwRelationInfo *) palloc0(sizeof(PgFdwRelationInfo));
initStringInfo(&fpinfo->sql);
sql = &fpinfo->sql;
}
/*
- * Construct remote query which consists of SELECT, FROM, and WHERE
- * clauses. Conditions which contain any Param node are excluded because
- * placeholder can't be used in EXPLAIN statement. Such conditions are
- * appended later.
+ * Identify which restriction clauses can be sent to the remote server and
+ * which can't. Conditions that are remotely executable but contain
+ * PARAM_EXTERN Params have to be treated separately because we can't use
+ * placeholders in remote EXPLAIN.
*/
classifyConditions(root, baserel, &remote_conds, ¶m_conds,
&local_conds, ¶m_numbers);
- deparseSimpleSql(sql, root, baserel, local_conds);
- if (list_length(remote_conds) > 0)
- appendWhereClause(sql, true, remote_conds, root);
+
+ /*
+ * Identify which attributes will need to be retrieved from the remote
+ * server. These include all attrs needed for joins or final output, plus
+ * all attrs used in the local_conds.
+ */
+ attrs_used = NULL;
+ pull_varattnos((Node *) baserel->reltargetlist, baserel->relid,
+ &attrs_used);
+ foreach(lc, local_conds)
+ {
+ RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
+
+ pull_varattnos((Node *) rinfo->clause, baserel->relid,
+ &attrs_used);
+ }
+
+ /*
+ * Construct remote query which consists of SELECT, FROM, and WHERE
+ * clauses. For now, leave out the param_conds.
+ */
+ deparseSelectSql(sql, root, baserel, attrs_used);
+ if (remote_conds)
+ appendWhereClause(sql, root, remote_conds, true);
/*
* If the table or the server is configured to use remote estimates,
userid = rte->checkAsUser ? rte->checkAsUser : GetUserId();
user = GetUserMapping(userid, server->serverid);
- conn = GetConnection(server, user);
+ conn = GetConnection(server, user, false);
get_remote_estimate(sql->data, conn, &rows, &width,
&startup_cost, &total_cost);
ReleaseConnection(conn);
/*
* Finish deparsing remote query by adding conditions which were unusable
- * in remote EXPLAIN since they contain Param nodes.
+ * in remote EXPLAIN because they contain Param nodes.
*/
- if (list_length(param_conds) > 0)
- appendWhereClause(sql, !(list_length(remote_conds) > 0), param_conds,
- root);
+ if (param_conds)
+ appendWhereClause(sql, root, param_conds, (remote_conds == NIL));
+
+ /*
+ * Add FOR UPDATE/SHARE if appropriate. We apply locking during the
+ * initial row fetch, rather than later on as is done for local tables.
+ * The extra roundtrips involved in trying to duplicate the local
+ * semantics exactly don't seem worthwhile (see also comments for
+ * RowMarkType).
+ */
+ if (baserel->relid == root->parse->resultRelation &&
+ (root->parse->commandType == CMD_UPDATE ||
+ root->parse->commandType == CMD_DELETE))
+ {
+ /* Relation is UPDATE/DELETE target, so use FOR UPDATE */
+ appendStringInfo(sql, " FOR UPDATE");
+ }
+ else
+ {
+ RowMarkClause *rc = get_parse_rowmark(root->parse, baserel->relid);
+
+ if (rc)
+ {
+ /*
+ * Relation is specified as a FOR UPDATE/SHARE target, so handle
+ * that.
+ *
+ * For now, just ignore any [NO] KEY specification, since (a) it's
+ * not clear what that means for a remote table that we don't have
+ * complete information about, and (b) it wouldn't work anyway on
+ * older remote servers. Likewise, we don't worry about NOWAIT.
+ */
+ switch (rc->strength)
+ {
+ case LCS_FORKEYSHARE:
+ case LCS_FORSHARE:
+ appendStringInfo(sql, " FOR SHARE");
+ break;
+ case LCS_FORNOKEYUPDATE:
+ case LCS_FORUPDATE:
+ appendStringInfo(sql, " FOR UPDATE");
+ break;
+ }
+ }
+ }
/*
* Store obtained information into FDW-private area of RelOptInfo so it's
/*
* Build the fdw_private list that will be available to the executor.
- * Items in the list must match enum FdwPrivateIndex, above.
+ * Items in the list must match enum FdwScanPrivateIndex, above.
*/
fdw_private = list_make2(makeString(fpinfo->sql.data),
fpinfo->param_numbers);
fdw_private);
}
-/*
- * postgresExplainForeignScan
- * Produce extra output for EXPLAIN
- */
-static void
-postgresExplainForeignScan(ForeignScanState *node, ExplainState *es)
-{
- List *fdw_private;
- char *sql;
-
- if (es->verbose)
- {
- fdw_private = ((ForeignScan *) node->ss.ps.plan)->fdw_private;
- sql = strVal(list_nth(fdw_private, FdwPrivateSelectSql));
- ExplainPropertyText("Remote SQL", sql, es);
- }
-}
-
/*
* postgresBeginForeignScan
* Initiate an executor scan of a foreign PostgreSQL table.
{
ForeignScan *fsplan = (ForeignScan *) node->ss.ps.plan;
EState *estate = node->ss.ps.state;
- PgFdwExecutionState *festate;
+ PgFdwScanState *fsstate;
RangeTblEntry *rte;
Oid userid;
ForeignTable *table;
/*
* We'll save private state in node->fdw_state.
*/
- festate = (PgFdwExecutionState *) palloc0(sizeof(PgFdwExecutionState));
- node->fdw_state = (void *) festate;
+ fsstate = (PgFdwScanState *) palloc0(sizeof(PgFdwScanState));
+ node->fdw_state = (void *) fsstate;
/*
* Identify which user to do the remote access as. This should match what
userid = rte->checkAsUser ? rte->checkAsUser : GetUserId();
/* Get info about foreign table. */
- festate->rel = node->ss.ss_currentRelation;
- table = GetForeignTable(RelationGetRelid(festate->rel));
+ fsstate->rel = node->ss.ss_currentRelation;
+ table = GetForeignTable(RelationGetRelid(fsstate->rel));
server = GetForeignServer(table->serverid);
user = GetUserMapping(userid, server->serverid);
* Get connection to the foreign server. Connection manager will
* establish new connection if necessary.
*/
- festate->conn = GetConnection(server, user);
+ fsstate->conn = GetConnection(server, user, false);
/* Assign a unique ID for my cursor */
- festate->cursor_number = GetCursorNumber(festate->conn);
- festate->cursor_exists = false;
+ fsstate->cursor_number = GetCursorNumber(fsstate->conn);
+ fsstate->cursor_exists = false;
/* Get private info created by planner functions. */
- festate->fdw_private = fsplan->fdw_private;
+ fsstate->fdw_private = fsplan->fdw_private;
/* Create contexts for batches of tuples and per-tuple temp workspace. */
- festate->batch_cxt = AllocSetContextCreate(estate->es_query_cxt,
+ fsstate->batch_cxt = AllocSetContextCreate(estate->es_query_cxt,
"postgres_fdw tuple data",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
- festate->temp_cxt = AllocSetContextCreate(estate->es_query_cxt,
+ fsstate->temp_cxt = AllocSetContextCreate(estate->es_query_cxt,
"postgres_fdw temporary data",
ALLOCSET_SMALL_MINSIZE,
ALLOCSET_SMALL_INITSIZE,
ALLOCSET_SMALL_MAXSIZE);
/* Get info we'll need for data conversion. */
- festate->attinmeta = TupleDescGetAttInMetadata(RelationGetDescr(festate->rel));
+ fsstate->attinmeta = TupleDescGetAttInMetadata(RelationGetDescr(fsstate->rel));
/*
* Allocate buffer for query parameters, if the remote conditions use any.
* null values that are arbitrarily marked as being of type int4.
*/
param_numbers = (List *)
- list_nth(festate->fdw_private, FdwPrivateExternParamIds);
+ list_nth(fsstate->fdw_private, FdwScanPrivateExternParamIds);
if (param_numbers != NIL)
{
ParamListInfo params = estate->es_param_list_info;
}
else
numParams = 0;
- festate->numParams = numParams;
+ fsstate->numParams = numParams;
if (numParams > 0)
{
/* we initially fill all slots with value = NULL, type = int4 */
- festate->param_types = (Oid *) palloc(numParams * sizeof(Oid));
- festate->param_values = (const char **) palloc0(numParams * sizeof(char *));
+ fsstate->param_types = (Oid *) palloc(numParams * sizeof(Oid));
+ fsstate->param_values = (const char **) palloc0(numParams * sizeof(char *));
for (i = 0; i < numParams; i++)
- festate->param_types[i] = INT4OID;
+ fsstate->param_types[i] = INT4OID;
}
else
{
- festate->param_types = NULL;
- festate->param_values = NULL;
+ fsstate->param_types = NULL;
+ fsstate->param_values = NULL;
}
- festate->extparams_done = false;
+ fsstate->extparams_done = false;
}
/*
static TupleTableSlot *
postgresIterateForeignScan(ForeignScanState *node)
{
- PgFdwExecutionState *festate = (PgFdwExecutionState *) node->fdw_state;
+ PgFdwScanState *fsstate = (PgFdwScanState *) node->fdw_state;
TupleTableSlot *slot = node->ss.ss_ScanTupleSlot;
/*
* If this is the first call after Begin or ReScan, we need to create the
* cursor on the remote side.
*/
- if (!festate->cursor_exists)
+ if (!fsstate->cursor_exists)
create_cursor(node);
/*
* Get some more tuples, if we've run out.
*/
- if (festate->next_tuple >= festate->num_tuples)
+ if (fsstate->next_tuple >= fsstate->num_tuples)
{
/* No point in another fetch if we already detected EOF, though. */
- if (!festate->eof_reached)
+ if (!fsstate->eof_reached)
fetch_more_data(node);
/* If we didn't get any tuples, must be end of data. */
- if (festate->next_tuple >= festate->num_tuples)
+ if (fsstate->next_tuple >= fsstate->num_tuples)
return ExecClearTuple(slot);
}
/*
* Return the next tuple.
*/
- ExecStoreTuple(festate->tuples[festate->next_tuple++],
+ ExecStoreTuple(fsstate->tuples[fsstate->next_tuple++],
slot,
InvalidBuffer,
false);
static void
postgresReScanForeignScan(ForeignScanState *node)
{
- PgFdwExecutionState *festate = (PgFdwExecutionState *) node->fdw_state;
+ PgFdwScanState *fsstate = (PgFdwScanState *) node->fdw_state;
char sql[64];
PGresult *res;
*/
/* If we haven't created the cursor yet, nothing to do. */
- if (!festate->cursor_exists)
+ if (!fsstate->cursor_exists)
return;
/*
*/
if (node->ss.ps.chgParam != NULL)
{
- festate->cursor_exists = false;
+ fsstate->cursor_exists = false;
snprintf(sql, sizeof(sql), "CLOSE c%u",
- festate->cursor_number);
+ fsstate->cursor_number);
}
- else if (festate->fetch_ct_2 > 1)
+ else if (fsstate->fetch_ct_2 > 1)
{
snprintf(sql, sizeof(sql), "MOVE BACKWARD ALL IN c%u",
- festate->cursor_number);
+ fsstate->cursor_number);
}
else
{
/* Easy: just rescan what we already have in memory, if anything */
- festate->next_tuple = 0;
+ fsstate->next_tuple = 0;
return;
}
* We don't use a PG_TRY block here, so be careful not to throw error
* without releasing the PGresult.
*/
- res = PQexec(festate->conn, sql);
+ res = PQexec(fsstate->conn, sql);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
pgfdw_report_error(ERROR, res, true, sql);
PQclear(res);
/* Now force a fresh FETCH. */
- festate->tuples = NULL;
- festate->num_tuples = 0;
- festate->next_tuple = 0;
- festate->fetch_ct_2 = 0;
- festate->eof_reached = false;
+ fsstate->tuples = NULL;
+ fsstate->num_tuples = 0;
+ fsstate->next_tuple = 0;
+ fsstate->fetch_ct_2 = 0;
+ fsstate->eof_reached = false;
}
/*
static void
postgresEndForeignScan(ForeignScanState *node)
{
- PgFdwExecutionState *festate = (PgFdwExecutionState *) node->fdw_state;
+ PgFdwScanState *fsstate = (PgFdwScanState *) node->fdw_state;
- /* if festate is NULL, we are in EXPLAIN; nothing to do */
- if (festate == NULL)
+ /* if fsstate is NULL, we are in EXPLAIN; nothing to do */
+ if (fsstate == NULL)
return;
/* Close the cursor if open, to prevent accumulation of cursors */
- if (festate->cursor_exists)
- close_cursor(festate->conn, festate->cursor_number);
+ if (fsstate->cursor_exists)
+ close_cursor(fsstate->conn, fsstate->cursor_number);
/* Release remote connection */
- ReleaseConnection(festate->conn);
- festate->conn = NULL;
+ ReleaseConnection(fsstate->conn);
+ fsstate->conn = NULL;
/* MemoryContexts will be deleted automatically. */
}
+/*
+ * postgresAddForeignUpdateTargets
+ * Add resjunk column(s) needed for update/delete on a foreign table
+ */
+static void
+postgresAddForeignUpdateTargets(Query *parsetree,
+ RangeTblEntry *target_rte,
+ Relation target_relation)
+{
+ Var *var;
+ const char *attrname;
+ TargetEntry *tle;
+
+ /*
+ * In postgres_fdw, what we need is the ctid, same as for a regular table.
+ */
+
+ /* Make a Var representing the desired value */
+ var = makeVar(parsetree->resultRelation,
+ SelfItemPointerAttributeNumber,
+ TIDOID,
+ -1,
+ InvalidOid,
+ 0);
+
+ /* Wrap it in a resjunk TLE with the right name ... */
+ attrname = "ctid";
+
+ tle = makeTargetEntry((Expr *) var,
+ list_length(parsetree->targetList) + 1,
+ pstrdup(attrname),
+ true);
+
+ /* ... and add it to the query's targetlist */
+ parsetree->targetList = lappend(parsetree->targetList, tle);
+}
+
+/*
+ * postgresPlanForeignModify
+ * Plan an insert/update/delete operation on a foreign table
+ *
+ * Note: currently, the plan tree generated for UPDATE/DELETE will always
+ * include a ForeignScan that retrieves ctids (using SELECT FOR UPDATE)
+ * and then the ModifyTable node will have to execute individual remote
+ * UPDATE/DELETE commands. If there are no local conditions or joins
+ * needed, it'd be better to let the scan node do UPDATE/DELETE RETURNING
+ * and then do nothing at ModifyTable. Room for future optimization ...
+ */
+static List *
+postgresPlanForeignModify(PlannerInfo *root,
+ ModifyTable *plan,
+ Index resultRelation,
+ int subplan_index)
+{
+ CmdType operation = plan->operation;
+ StringInfoData sql;
+ List *targetAttrs = NIL;
+ List *returningList = NIL;
+
+ initStringInfo(&sql);
+
+ /*
+ * Construct a list of the columns that are to be assigned during INSERT
+ * or UPDATE. We should transmit only these columns, for performance and
+ * to respect any DEFAULT values the remote side may have for other
+ * columns. (XXX this will need some re-thinking when we support default
+ * expressions for foreign tables.)
+ */
+ if (operation == CMD_INSERT || operation == CMD_UPDATE)
+ {
+ RangeTblEntry *rte = planner_rt_fetch(resultRelation, root);
+ Bitmapset *tmpset = bms_copy(rte->modifiedCols);
+ AttrNumber col;
+
+ while ((col = bms_first_member(tmpset)) >= 0)
+ {
+ col += FirstLowInvalidHeapAttributeNumber;
+ if (col <= InvalidAttrNumber) /* shouldn't happen */
+ elog(ERROR, "system-column update is not supported");
+ targetAttrs = lappend_int(targetAttrs, col);
+ }
+ }
+
+ /*
+ * Extract the relevant RETURNING list if any.
+ */
+ if (plan->returningLists)
+ returningList = (List *) list_nth(plan->returningLists, subplan_index);
+
+ /*
+ * Construct the SQL command string.
+ */
+ switch (operation)
+ {
+ case CMD_INSERT:
+ deparseInsertSql(&sql, root, resultRelation,
+ targetAttrs, returningList);
+ break;
+ case CMD_UPDATE:
+ deparseUpdateSql(&sql, root, resultRelation,
+ targetAttrs, returningList);
+ break;
+ case CMD_DELETE:
+ deparseDeleteSql(&sql, root, resultRelation, returningList);
+ break;
+ default:
+ elog(ERROR, "unexpected operation: %d", (int) operation);
+ break;
+ }
+
+ /*
+ * Build the fdw_private list that will be available to the executor.
+ * Items in the list must match enum FdwModifyPrivateIndex, above.
+ */
+ return list_make3(makeString(sql.data),
+ targetAttrs,
+ makeInteger((returningList != NIL)));
+}
+
+/*
+ * postgresBeginForeignModify
+ * Begin an insert/update/delete operation on a foreign table
+ */
+static void
+postgresBeginForeignModify(ModifyTableState *mtstate,
+ ResultRelInfo *resultRelInfo,
+ List *fdw_private,
+ int subplan_index,
+ int eflags)
+{
+ PgFdwModifyState *fmstate;
+ EState *estate = mtstate->ps.state;
+ CmdType operation = mtstate->operation;
+ Relation rel = resultRelInfo->ri_RelationDesc;
+ RangeTblEntry *rte;
+ Oid userid;
+ ForeignTable *table;
+ ForeignServer *server;
+ UserMapping *user;
+ AttrNumber n_params;
+ Oid typefnoid;
+ bool isvarlena;
+ ListCell *lc;
+
+ /*
+ * Do nothing in EXPLAIN (no ANALYZE) case. resultRelInfo->ri_FdwState
+ * stays NULL.
+ */
+ if (eflags & EXEC_FLAG_EXPLAIN_ONLY)
+ return;
+
+ /* Begin constructing PgFdwModifyState. */
+ fmstate = (PgFdwModifyState *) palloc0(sizeof(PgFdwModifyState));
+ fmstate->rel = rel;
+
+ /*
+ * Identify which user to do the remote access as. This should match what
+ * ExecCheckRTEPerms() does.
+ */
+ rte = rt_fetch(resultRelInfo->ri_RangeTableIndex, estate->es_range_table);
+ userid = rte->checkAsUser ? rte->checkAsUser : GetUserId();
+
+ /* Get info about foreign table. */
+ table = GetForeignTable(RelationGetRelid(rel));
+ server = GetForeignServer(table->serverid);
+ user = GetUserMapping(userid, server->serverid);
+
+ /* Open connection; report that we'll create a prepared statement. */
+ fmstate->conn = GetConnection(server, user, true);
+ fmstate->p_name = NULL; /* prepared statement not made yet */
+
+ /* Deconstruct fdw_private data. */
+ fmstate->query = strVal(list_nth(fdw_private,
+ FdwModifyPrivateUpdateSql));
+ fmstate->target_attrs = (List *) list_nth(fdw_private,
+ FdwModifyPrivateTargetAttnums);
+ fmstate->has_returning = intVal(list_nth(fdw_private,
+ FdwModifyPrivateHasReturning));
+
+ /* Create context for per-tuple temp workspace. */
+ fmstate->temp_cxt = AllocSetContextCreate(estate->es_query_cxt,
+ "postgres_fdw temporary data",
+ ALLOCSET_SMALL_MINSIZE,
+ ALLOCSET_SMALL_INITSIZE,
+ ALLOCSET_SMALL_MAXSIZE);
+
+ /* Prepare for input conversion of RETURNING results. */
+ if (fmstate->has_returning)
+ fmstate->attinmeta = TupleDescGetAttInMetadata(RelationGetDescr(rel));
+
+ /* Prepare for output conversion of parameters used in prepared stmt. */
+ n_params = list_length(fmstate->target_attrs) + 1;
+ fmstate->p_flinfo = (FmgrInfo *) palloc0(sizeof(FmgrInfo) * n_params);
+ fmstate->p_nums = 0;
+
+ if (operation == CMD_UPDATE || operation == CMD_DELETE)
+ {
+ /* Find the ctid resjunk column in the subplan's result */
+ Plan *subplan = mtstate->mt_plans[subplan_index]->plan;
+
+ fmstate->ctidAttno = ExecFindJunkAttributeInTlist(subplan->targetlist,
+ "ctid");
+ if (!AttributeNumberIsValid(fmstate->ctidAttno))
+ elog(ERROR, "could not find junk ctid column");
+
+ /* First transmittable parameter will be ctid */
+ getTypeOutputInfo(TIDOID, &typefnoid, &isvarlena);
+ fmgr_info(typefnoid, &fmstate->p_flinfo[fmstate->p_nums]);
+ fmstate->p_nums++;
+ }
+
+ if (operation == CMD_INSERT || operation == CMD_UPDATE)
+ {
+ /* Set up for remaining transmittable parameters */
+ foreach(lc, fmstate->target_attrs)
+ {
+ int attnum = lfirst_int(lc);
+ Form_pg_attribute attr = RelationGetDescr(rel)->attrs[attnum - 1];
+
+ Assert(!attr->attisdropped);
+
+ getTypeOutputInfo(attr->atttypid, &typefnoid, &isvarlena);
+ fmgr_info(typefnoid, &fmstate->p_flinfo[fmstate->p_nums]);
+ fmstate->p_nums++;
+ }
+ }
+
+ Assert(fmstate->p_nums <= n_params);
+
+ resultRelInfo->ri_FdwState = fmstate;
+}
+
+/*
+ * postgresExecForeignInsert
+ * Insert one row into a foreign table
+ */
+static TupleTableSlot *
+postgresExecForeignInsert(EState *estate,
+ ResultRelInfo *resultRelInfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot)
+{
+ PgFdwModifyState *fmstate = (PgFdwModifyState *) resultRelInfo->ri_FdwState;
+ const char **p_values;
+ PGresult *res;
+ int n_rows;
+
+ /* Set up the prepared statement on the remote server, if we didn't yet */
+ if (!fmstate->p_name)
+ prepare_foreign_modify(fmstate);
+
+ /* Convert parameters needed by prepared statement to text form */
+ p_values = convert_prep_stmt_params(fmstate, NULL, slot);
+
+ /*
+ * Execute the prepared statement, and check for success.
+ *
+ * We don't use a PG_TRY block here, so be careful not to throw error
+ * without releasing the PGresult.
+ */
+ res = PQexecPrepared(fmstate->conn,
+ fmstate->p_name,
+ fmstate->p_nums,
+ p_values,
+ NULL,
+ NULL,
+ 0);
+ if (PQresultStatus(res) !=
+ (fmstate->has_returning ? PGRES_TUPLES_OK : PGRES_COMMAND_OK))
+ pgfdw_report_error(ERROR, res, true, fmstate->query);
+
+ /* Check number of rows affected, and fetch RETURNING tuple if any */
+ if (fmstate->has_returning)
+ {
+ n_rows = PQntuples(res);
+ if (n_rows > 0)
+ store_returning_result(fmstate, slot, res);
+ }
+ else
+ n_rows = atoi(PQcmdTuples(res));
+
+ /* And clean up */
+ PQclear(res);
+
+ MemoryContextReset(fmstate->temp_cxt);
+
+ /* Return NULL if nothing was inserted on the remote end */
+ return (n_rows > 0) ? slot : NULL;
+}
+
+/*
+ * postgresExecForeignUpdate
+ * Update one row in a foreign table
+ */
+static TupleTableSlot *
+postgresExecForeignUpdate(EState *estate,
+ ResultRelInfo *resultRelInfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot)
+{
+ PgFdwModifyState *fmstate = (PgFdwModifyState *) resultRelInfo->ri_FdwState;
+ Datum datum;
+ bool isNull;
+ const char **p_values;
+ PGresult *res;
+ int n_rows;
+
+ /* Set up the prepared statement on the remote server, if we didn't yet */
+ if (!fmstate->p_name)
+ prepare_foreign_modify(fmstate);
+
+ /* Get the ctid that was passed up as a resjunk column */
+ datum = ExecGetJunkAttribute(planSlot,
+ fmstate->ctidAttno,
+ &isNull);
+ /* shouldn't ever get a null result... */
+ if (isNull)
+ elog(ERROR, "ctid is NULL");
+
+ /* Convert parameters needed by prepared statement to text form */
+ p_values = convert_prep_stmt_params(fmstate,
+ (ItemPointer) DatumGetPointer(datum),
+ slot);
+
+ /*
+ * Execute the prepared statement, and check for success.
+ *
+ * We don't use a PG_TRY block here, so be careful not to throw error
+ * without releasing the PGresult.
+ */
+ res = PQexecPrepared(fmstate->conn,
+ fmstate->p_name,
+ fmstate->p_nums,
+ p_values,
+ NULL,
+ NULL,
+ 0);
+ if (PQresultStatus(res) !=
+ (fmstate->has_returning ? PGRES_TUPLES_OK : PGRES_COMMAND_OK))
+ pgfdw_report_error(ERROR, res, true, fmstate->query);
+
+ /* Check number of rows affected, and fetch RETURNING tuple if any */
+ if (fmstate->has_returning)
+ {
+ n_rows = PQntuples(res);
+ if (n_rows > 0)
+ store_returning_result(fmstate, slot, res);
+ }
+ else
+ n_rows = atoi(PQcmdTuples(res));
+
+ /* And clean up */
+ PQclear(res);
+
+ MemoryContextReset(fmstate->temp_cxt);
+
+ /* Return NULL if nothing was updated on the remote end */
+ return (n_rows > 0) ? slot : NULL;
+}
+
+/*
+ * postgresExecForeignDelete
+ * Delete one row from a foreign table
+ */
+static TupleTableSlot *
+postgresExecForeignDelete(EState *estate,
+ ResultRelInfo *resultRelInfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot)
+{
+ PgFdwModifyState *fmstate = (PgFdwModifyState *) resultRelInfo->ri_FdwState;
+ Datum datum;
+ bool isNull;
+ const char **p_values;
+ PGresult *res;
+ int n_rows;
+
+ /* Set up the prepared statement on the remote server, if we didn't yet */
+ if (!fmstate->p_name)
+ prepare_foreign_modify(fmstate);
+
+ /* Get the ctid that was passed up as a resjunk column */
+ datum = ExecGetJunkAttribute(planSlot,
+ fmstate->ctidAttno,
+ &isNull);
+ /* shouldn't ever get a null result... */
+ if (isNull)
+ elog(ERROR, "ctid is NULL");
+
+ /* Convert parameters needed by prepared statement to text form */
+ p_values = convert_prep_stmt_params(fmstate,
+ (ItemPointer) DatumGetPointer(datum),
+ NULL);
+
+ /*
+ * Execute the prepared statement, and check for success.
+ *
+ * We don't use a PG_TRY block here, so be careful not to throw error
+ * without releasing the PGresult.
+ */
+ res = PQexecPrepared(fmstate->conn,
+ fmstate->p_name,
+ fmstate->p_nums,
+ p_values,
+ NULL,
+ NULL,
+ 0);
+ if (PQresultStatus(res) !=
+ (fmstate->has_returning ? PGRES_TUPLES_OK : PGRES_COMMAND_OK))
+ pgfdw_report_error(ERROR, res, true, fmstate->query);
+
+ /* Check number of rows affected, and fetch RETURNING tuple if any */
+ if (fmstate->has_returning)
+ {
+ n_rows = PQntuples(res);
+ if (n_rows > 0)
+ store_returning_result(fmstate, slot, res);
+ }
+ else
+ n_rows = atoi(PQcmdTuples(res));
+
+ /* And clean up */
+ PQclear(res);
+
+ MemoryContextReset(fmstate->temp_cxt);
+
+ /* Return NULL if nothing was deleted on the remote end */
+ return (n_rows > 0) ? slot : NULL;
+}
+
+/*
+ * postgresEndForeignModify
+ * Finish an insert/update/delete operation on a foreign table
+ */
+static void
+postgresEndForeignModify(EState *estate,
+ ResultRelInfo *resultRelInfo)
+{
+ PgFdwModifyState *fmstate = (PgFdwModifyState *) resultRelInfo->ri_FdwState;
+
+ /* If fmstate is NULL, we are in EXPLAIN; nothing to do */
+ if (fmstate == NULL)
+ return;
+
+ /* If we created a prepared statement, destroy it */
+ if (fmstate->p_name)
+ {
+ char sql[64];
+ PGresult *res;
+
+ snprintf(sql, sizeof(sql), "DEALLOCATE %s", fmstate->p_name);
+
+ /*
+ * We don't use a PG_TRY block here, so be careful not to throw error
+ * without releasing the PGresult.
+ */
+ res = PQexec(fmstate->conn, sql);
+ if (PQresultStatus(res) != PGRES_COMMAND_OK)
+ pgfdw_report_error(ERROR, res, true, sql);
+ PQclear(res);
+ fmstate->p_name = NULL;
+ }
+
+ /* Release remote connection */
+ ReleaseConnection(fmstate->conn);
+ fmstate->conn = NULL;
+}
+
+/*
+ * postgresExplainForeignScan
+ * Produce extra output for EXPLAIN of a ForeignScan on a foreign table
+ */
+static void
+postgresExplainForeignScan(ForeignScanState *node, ExplainState *es)
+{
+ List *fdw_private;
+ char *sql;
+
+ if (es->verbose)
+ {
+ fdw_private = ((ForeignScan *) node->ss.ps.plan)->fdw_private;
+ sql = strVal(list_nth(fdw_private, FdwScanPrivateSelectSql));
+ ExplainPropertyText("Remote SQL", sql, es);
+ }
+}
+
+/*
+ * postgresExplainForeignModify
+ * Produce extra output for EXPLAIN of a ModifyTable on a foreign table
+ */
+static void
+postgresExplainForeignModify(ModifyTableState *mtstate,
+ ResultRelInfo *rinfo,
+ List *fdw_private,
+ int subplan_index,
+ ExplainState *es)
+{
+ if (es->verbose)
+ {
+ char *sql = strVal(list_nth(fdw_private,
+ FdwModifyPrivateUpdateSql));
+
+ ExplainPropertyText("Remote SQL", sql, es);
+ }
+}
+
/*
* Estimate costs of executing given SQL statement.
*/
static void
create_cursor(ForeignScanState *node)
{
- PgFdwExecutionState *festate = (PgFdwExecutionState *) node->fdw_state;
- int numParams = festate->numParams;
- Oid *types = festate->param_types;
- const char **values = festate->param_values;
- PGconn *conn = festate->conn;
+ PgFdwScanState *fsstate = (PgFdwScanState *) node->fdw_state;
+ int numParams = fsstate->numParams;
+ Oid *types = fsstate->param_types;
+ const char **values = fsstate->param_values;
+ PGconn *conn = fsstate->conn;
char *sql;
StringInfoData buf;
PGresult *res;
* recreate the cursor after a rescan, so we could need to re-use the
* values anyway.
*/
- if (numParams > 0 && !festate->extparams_done)
+ if (numParams > 0 && !fsstate->extparams_done)
{
ParamListInfo params = node->ss.ps.state->es_param_list_info;
List *param_numbers;
ListCell *lc;
param_numbers = (List *)
- list_nth(festate->fdw_private, FdwPrivateExternParamIds);
+ list_nth(fsstate->fdw_private, FdwScanPrivateExternParamIds);
foreach(lc, param_numbers)
{
int paramno = lfirst_int(lc);
* same OIDs we do for the parameters' types.
*
* We'd not need to pass a type array to PQexecParams at all,
- * except that there may be unused holes in the array, which
- * will have to be filled with something or the remote server will
+ * except that there may be unused holes in the array, which will
+ * have to be filled with something or the remote server will
* complain. We arbitrarily set them to INT4OID earlier.
*/
types[paramno - 1] = InvalidOid;
prm->value);
}
}
- festate->extparams_done = true;
+ fsstate->extparams_done = true;
}
/* Construct the DECLARE CURSOR command */
- sql = strVal(list_nth(festate->fdw_private, FdwPrivateSelectSql));
+ sql = strVal(list_nth(fsstate->fdw_private, FdwScanPrivateSelectSql));
initStringInfo(&buf);
appendStringInfo(&buf, "DECLARE c%u CURSOR FOR\n%s",
- festate->cursor_number, sql);
+ fsstate->cursor_number, sql);
/*
* We don't use a PG_TRY block here, so be careful not to throw error
PQclear(res);
/* Mark the cursor as created, and show no tuples have been retrieved */
- festate->cursor_exists = true;
- festate->tuples = NULL;
- festate->num_tuples = 0;
- festate->next_tuple = 0;
- festate->fetch_ct_2 = 0;
- festate->eof_reached = false;
+ fsstate->cursor_exists = true;
+ fsstate->tuples = NULL;
+ fsstate->num_tuples = 0;
+ fsstate->next_tuple = 0;
+ fsstate->fetch_ct_2 = 0;
+ fsstate->eof_reached = false;
/* Clean up */
pfree(buf.data);
static void
fetch_more_data(ForeignScanState *node)
{
- PgFdwExecutionState *festate = (PgFdwExecutionState *) node->fdw_state;
+ PgFdwScanState *fsstate = (PgFdwScanState *) node->fdw_state;
PGresult *volatile res = NULL;
MemoryContext oldcontext;
* We'll store the tuples in the batch_cxt. First, flush the previous
* batch.
*/
- festate->tuples = NULL;
- MemoryContextReset(festate->batch_cxt);
- oldcontext = MemoryContextSwitchTo(festate->batch_cxt);
+ fsstate->tuples = NULL;
+ MemoryContextReset(fsstate->batch_cxt);
+ oldcontext = MemoryContextSwitchTo(fsstate->batch_cxt);
/* PGresult must be released before leaving this function. */
PG_TRY();
{
- PGconn *conn = festate->conn;
+ PGconn *conn = fsstate->conn;
char sql[64];
int fetch_size;
int numrows;
fetch_size = 100;
snprintf(sql, sizeof(sql), "FETCH %d FROM c%u",
- fetch_size, festate->cursor_number);
+ fetch_size, fsstate->cursor_number);
res = PQexec(conn, sql);
/* On error, report the original query, not the FETCH. */
if (PQresultStatus(res) != PGRES_TUPLES_OK)
pgfdw_report_error(ERROR, res, false,
- strVal(list_nth(festate->fdw_private,
- FdwPrivateSelectSql)));
+ strVal(list_nth(fsstate->fdw_private,
+ FdwScanPrivateSelectSql)));
/* Convert the data into HeapTuples */
numrows = PQntuples(res);
- festate->tuples = (HeapTuple *) palloc0(numrows * sizeof(HeapTuple));
- festate->num_tuples = numrows;
- festate->next_tuple = 0;
+ fsstate->tuples = (HeapTuple *) palloc0(numrows * sizeof(HeapTuple));
+ fsstate->num_tuples = numrows;
+ fsstate->next_tuple = 0;
for (i = 0; i < numrows; i++)
{
- festate->tuples[i] =
+ fsstate->tuples[i] =
make_tuple_from_result_row(res, i,
- festate->rel,
- festate->attinmeta,
- festate->temp_cxt);
+ fsstate->rel,
+ fsstate->attinmeta,
+ fsstate->temp_cxt);
}
/* Update fetch_ct_2 */
- if (festate->fetch_ct_2 < 2)
- festate->fetch_ct_2++;
+ if (fsstate->fetch_ct_2 < 2)
+ fsstate->fetch_ct_2++;
/* Must be EOF if we didn't get as many tuples as we asked for. */
- festate->eof_reached = (numrows < fetch_size);
+ fsstate->eof_reached = (numrows < fetch_size);
PQclear(res);
res = NULL;
PQclear(res);
}
+/*
+ * prepare_foreign_modify
+ * Establish a prepared statement for execution of INSERT/UPDATE/DELETE
+ */
+static void
+prepare_foreign_modify(PgFdwModifyState *fmstate)
+{
+ char prep_name[NAMEDATALEN];
+ char *p_name;
+ PGresult *res;
+
+ /* Construct name we'll use for the prepared statement. */
+ snprintf(prep_name, sizeof(prep_name), "pgsql_fdw_prep_%u",
+ GetPrepStmtNumber(fmstate->conn));
+ p_name = pstrdup(prep_name);
+
+ /*
+ * We intentionally do not specify parameter types here, but leave the
+ * remote server to derive them by default. This avoids possible problems
+ * with the remote server using different type OIDs than we do. All of
+ * the prepared statements we use in this module are simple enough that
+ * the remote server will make the right choices.
+ *
+ * We don't use a PG_TRY block here, so be careful not to throw error
+ * without releasing the PGresult.
+ */
+ res = PQprepare(fmstate->conn,
+ p_name,
+ fmstate->query,
+ 0,
+ NULL);
+
+ if (PQresultStatus(res) != PGRES_COMMAND_OK)
+ pgfdw_report_error(ERROR, res, true, fmstate->query);
+ PQclear(res);
+
+ /* This action shows that the prepare has been done. */
+ fmstate->p_name = p_name;
+}
+
+/*
+ * convert_prep_stmt_params
+ * Create array of text strings representing parameter values
+ *
+ * tupleid is ctid to send, or NULL if none
+ * slot is slot to get remaining parameters from, or NULL if none
+ *
+ * Data is constructed in temp_cxt; caller should reset that after use.
+ */
+static const char **
+convert_prep_stmt_params(PgFdwModifyState *fmstate,
+ ItemPointer tupleid,
+ TupleTableSlot *slot)
+{
+ const char **p_values;
+ int pindex = 0;
+ MemoryContext oldcontext;
+
+ oldcontext = MemoryContextSwitchTo(fmstate->temp_cxt);
+
+ p_values = (const char **) palloc(sizeof(char *) * fmstate->p_nums);
+
+ /* 1st parameter should be ctid, if it's in use */
+ if (tupleid != NULL)
+ {
+ p_values[pindex] = OutputFunctionCall(&fmstate->p_flinfo[pindex],
+ PointerGetDatum(tupleid));
+ pindex++;
+ }
+
+ /* get following parameters from slot */
+ if (slot != NULL)
+ {
+ ListCell *lc;
+
+ foreach(lc, fmstate->target_attrs)
+ {
+ int attnum = lfirst_int(lc);
+ Datum value;
+ bool isnull;
+
+ value = slot_getattr(slot, attnum, &isnull);
+ if (isnull)
+ p_values[pindex] = NULL;
+ else
+ p_values[pindex] = OutputFunctionCall(&fmstate->p_flinfo[pindex],
+ value);
+ pindex++;
+ }
+ }
+
+ Assert(pindex == fmstate->p_nums);
+
+ MemoryContextSwitchTo(oldcontext);
+
+ return p_values;
+}
+
+/*
+ * store_returning_result
+ * Store the result of a RETURNING clause
+ *
+ * On error, be sure to release the PGresult on the way out. Callers do not
+ * have PG_TRY blocks to ensure this happens.
+ */
+static void
+store_returning_result(PgFdwModifyState *fmstate,
+ TupleTableSlot *slot, PGresult *res)
+{
+ /* PGresult must be released before leaving this function. */
+ PG_TRY();
+ {
+ HeapTuple newtup;
+
+ newtup = make_tuple_from_result_row(res, 0,
+ fmstate->rel,
+ fmstate->attinmeta,
+ fmstate->temp_cxt);
+ /* tuple will be deleted when it is cleared from the slot */
+ ExecStoreTuple(newtup, slot, InvalidBuffer, true);
+ }
+ PG_CATCH();
+ {
+ if (res)
+ PQclear(res);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+}
+
/*
* postgresAnalyzeForeignTable
* Test whether analyzing this foreign table is supported
*func = postgresAcquireSampleRowsFunc;
/*
- * Now we have to get the number of pages. It's annoying that the ANALYZE
+ * Now we have to get the number of pages. It's annoying that the ANALYZE
* API requires us to return that now, because it forces some duplication
* of effort between this routine and postgresAcquireSampleRowsFunc. But
* it's probably not worth redefining that API at this point.
table = GetForeignTable(RelationGetRelid(relation));
server = GetForeignServer(table->serverid);
user = GetUserMapping(relation->rd_rel->relowner, server->serverid);
- conn = GetConnection(server, user);
+ conn = GetConnection(server, user, false);
/*
* Construct command to get page count for relation.
table = GetForeignTable(RelationGetRelid(relation));
server = GetForeignServer(table->serverid);
user = GetUserMapping(relation->rd_rel->relowner, server->serverid);
- conn = GetConnection(server, user);
+ conn = GetConnection(server, user, false);
/*
* Construct cursor that retrieves whole rows from remote.
Form_pg_attribute *attrs = tupdesc->attrs;
Datum *values;
bool *nulls;
+ ItemPointer ctid = NULL;
ConversionLocation errpos;
ErrorContextCallback errcallback;
MemoryContext oldcontext;
j++;
}
+ /*
+ * Convert ctid if present. XXX we could stand to have a cleaner way of
+ * detecting whether ctid is included in the result.
+ */
+ if (j < PQnfields(res))
+ {
+ char *valstr;
+ Datum datum;
+
+ valstr = PQgetvalue(res, row, j);
+ datum = DirectFunctionCall1(tidin, CStringGetDatum(valstr));
+ ctid = (ItemPointer) DatumGetPointer(datum);
+ j++;
+ }
+
/* Uninstall error context callback. */
error_context_stack = errcallback.previous;
tuple = heap_form_tuple(tupdesc, values, nulls);
+ if (ctid)
+ tuple->t_self = *ctid;
+
/* Clean up */
MemoryContextReset(temp_context);
#include "libpq-fe.h"
/* in connection.c */
-extern PGconn *GetConnection(ForeignServer *server, UserMapping *user);
+extern PGconn *GetConnection(ForeignServer *server, UserMapping *user,
+ bool will_prep_stmt);
extern void ReleaseConnection(PGconn *conn);
extern unsigned int GetCursorNumber(PGconn *conn);
+extern unsigned int GetPrepStmtNumber(PGconn *conn);
extern void pgfdw_report_error(int elevel, PGresult *res, bool clear,
const char *sql);
List **param_conds,
List **local_conds,
List **param_numbers);
-extern void deparseSimpleSql(StringInfo buf,
+extern void deparseSelectSql(StringInfo buf,
PlannerInfo *root,
RelOptInfo *baserel,
- List *local_conds);
+ Bitmapset *attrs_used);
extern void appendWhereClause(StringInfo buf,
- bool has_where,
+ PlannerInfo *root,
List *exprs,
- PlannerInfo *root);
+ bool is_first);
+extern void deparseInsertSql(StringInfo buf, PlannerInfo *root, Index rtindex,
+ List *targetAttrs, List *returningList);
+extern void deparseUpdateSql(StringInfo buf, PlannerInfo *root, Index rtindex,
+ List *targetAttrs, List *returningList);
+extern void deparseDeleteSql(StringInfo buf, PlannerInfo *root, Index rtindex,
+ List *returningList);
extern void deparseAnalyzeSizeSql(StringInfo buf, Relation rel);
extern void deparseAnalyzeSql(StringInfo buf, Relation rel);
FETCH c;
SELECT * FROM ft1 ORDER BY c1 LIMIT 1;
COMMIT;
+
+-- ===================================================================
+-- test writable foreign table stuff
+-- ===================================================================
+EXPLAIN (verbose, costs off)
+INSERT INTO ft2 (c1,c2,c3) SELECT c1+1000,c2+100, c3 || c3 FROM ft2 LIMIT 20;
+INSERT INTO ft2 (c1,c2,c3) SELECT c1+1000,c2+100, c3 || c3 FROM ft2 LIMIT 20;
+INSERT INTO ft2 (c1,c2,c3)
+ VALUES (1101,201,'aaa'), (1102,202,'bbb'), (1103,203,'ccc') RETURNING *;
+INSERT INTO ft2 (c1,c2,c3) VALUES (1104,204,'ddd'), (1105,205,'eee');
+UPDATE ft2 SET c2 = c2 + 300, c3 = c3 || '_update3' WHERE c1 % 10 = 3;
+UPDATE ft2 SET c2 = c2 + 400, c3 = c3 || '_update7' WHERE c1 % 10 = 7 RETURNING *;
+EXPLAIN (verbose, costs off)
+UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9'
+ FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9;
+UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9'
+ FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9;
+DELETE FROM ft2 WHERE c1 % 10 = 5 RETURNING *;
+EXPLAIN (verbose, costs off)
+DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2;
+DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2;
+SELECT c1,c2,c3,c4 FROM ft2 ORDER BY c1;
+
+-- Test that defaults and triggers on remote table work as expected
+ALTER TABLE "S 1"."T 1" ALTER c6 SET DEFAULT '(^-^;)';
+CREATE OR REPLACE FUNCTION "S 1".F_BRTRIG() RETURNS trigger AS $$
+BEGIN
+ NEW.c3 = NEW.c3 || '_trig_update';
+ RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+CREATE TRIGGER t1_br_insert BEFORE INSERT OR UPDATE
+ ON "S 1"."T 1" FOR EACH ROW EXECUTE PROCEDURE "S 1".F_BRTRIG();
+
+INSERT INTO ft2 (c1,c2,c3) VALUES (1208, 218, 'fff') RETURNING *;
+INSERT INTO ft2 (c1,c2,c3,c6) VALUES (1218, 218, 'ggg', '(--;') RETURNING *;
+UPDATE ft2 SET c2 = c2 + 600 WHERE c1 % 10 = 8 RETURNING *;
+
+-- Test errors thrown on remote side during update
+ALTER TABLE "S 1"."T 1" ADD CONSTRAINT c2positive CHECK (c2 >= 0);
+
+INSERT INTO ft1(c1, c2) VALUES(11, 12); -- duplicate key
+INSERT INTO ft1(c1, c2) VALUES(1111, -2); -- c2positive
+UPDATE ft1 SET c2 = -c2 WHERE c1 = 1; -- c2positive
+
+-- Test savepoint/rollback behavior
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
+begin;
+update ft2 set c2 = 42 where c2 = 0;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+savepoint s1;
+update ft2 set c2 = 44 where c2 = 4;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+release savepoint s1;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+savepoint s2;
+update ft2 set c2 = 46 where c2 = 6;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+rollback to savepoint s2;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+release savepoint s2;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+savepoint s3;
+update ft2 set c2 = -2 where c2 = 42; -- fail on remote side
+rollback to savepoint s3;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+release savepoint s3;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+-- none of the above is committed yet remotely
+select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
+commit;
+select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
+select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
Foreign data is accessed with help from a
<firstterm>foreign data wrapper</firstterm>. A foreign data wrapper is a
library that can communicate with an external data source, hiding the
- details of connecting to the data source and fetching data from it. There
- is a foreign data wrapper available as a <filename>contrib</> module,
- which can read plain data files residing on the server. Other kind of
- foreign data wrappers might be found as third party products. If none of
- the existing foreign data wrappers suit your needs, you can write your
- own; see <xref linkend="fdwhandler">.
+ details of connecting to the data source and obtaining data from it.
+ There are some foreign data wrappers available as <filename>contrib</>
+ modules; see <xref linkend="contrib">. Other kinds of foreign data
+ wrappers might be found as third party products. If none of the existing
+ foreign data wrappers suit your needs, you can write your own; see <xref
+ linkend="fdwhandler">.
</para>
<para>
To access foreign data, you need to create a <firstterm>foreign server</>
- object, which defines how to connect to a particular external data source,
- according to the set of options used by a particular foreign data
+ object, which defines how to connect to a particular external data source
+ according to the set of options used by its supporting foreign data
wrapper. Then you need to create one or more <firstterm>foreign
tables</firstterm>, which define the structure of the remote data. A
foreign table can be used in queries just like a normal table, but a
foreign table has no storage in the PostgreSQL server. Whenever it is
used, <productname>PostgreSQL</productname> asks the foreign data wrapper
- to fetch the data from the external source.
+ to fetch data from the external source, or transmit data to the external
+ source in the case of update commands.
</para>
<para>
- Accessing remote data may require authentication at the external
+ Accessing remote data may require authenticating to the external
data source. This information can be provided by a
- <firstterm>user mapping</>, which can provide additional options based
+ <firstterm>user mapping</>, which can provide additional data
+ such as user names and passwords based
on the current <productname>PostgreSQL</productname> role.
</para>
<para>
- Currently, foreign tables are read-only. This limitation may be fixed
- in a future release.
+ For additional information, see
+ <xref linkend="sql-createforeigndatawrapper">,
+ <xref linkend="sql-createserver">,
+ <xref linkend="sql-createusermapping">, and
+ <xref linkend="sql-createforeigntable">.
</para>
</sect1>
wrapper, which consists of a set of functions that the core server
calls. The foreign data wrapper is responsible for fetching
data from the remote data source and returning it to the
- <productname>PostgreSQL</productname> executor. This chapter outlines how
- to write a new foreign data wrapper.
+ <productname>PostgreSQL</productname> executor. If updating foreign
+ tables is to be supported, the wrapper must handle that, too.
+ This chapter outlines how to write a new foreign data wrapper.
</para>
<para>
The foreign data wrappers included in the standard distribution are good
references when trying to write your own. Look into the
- <filename>contrib/file_fdw</> subdirectory of the source tree.
+ <filename>contrib</> subdirectory of the source tree.
The <xref linkend="sql-createforeigndatawrapper"> reference page also has
some useful details.
</para>
<para>
The FDW handler function returns a palloc'd <structname>FdwRoutine</>
- struct containing pointers to the following callback functions:
+ struct containing pointers to the callback functions described below.
+ The scan-related functions are required, the rest are optional.
</para>
+ <para>
+ The <structname>FdwRoutine</> struct type is declared in
+ <filename>src/include/foreign/fdwapi.h</>, which see for additional
+ details.
+ </para>
+
+ <sect2 id="fdw-callbacks-scan">
+ <title>FDW Routines For Scanning Foreign Tables</title>
+
<para>
<programlisting>
void
</programlisting>
Obtain relation size estimates for a foreign table. This is called
- at the beginning of planning for a query involving a foreign table.
+ at the beginning of planning for a query that scans a foreign table.
<literal>root</> is the planner's global information about the query;
<literal>baserel</> is the planner's information about this table; and
<literal>foreigntableid</> is the <structname>pg_class</> OID of the
<para>
<programlisting>
void
-ExplainForeignScan (ForeignScanState *node,
- ExplainState *es);
-</programlisting>
-
- Print additional <command>EXPLAIN</> output for a foreign table scan.
- This can just return if there is no need to print anything.
- Otherwise, it should call <function>ExplainPropertyText</> and
- related functions to add fields to the <command>EXPLAIN</> output.
- The flag fields in <literal>es</> can be used to determine what to
- print, and the state of the <structname>ForeignScanState</> node
- can be inspected to provide run-time statistics in the <command>EXPLAIN
- ANALYZE</> case.
- </para>
-
- <para>
-<programlisting>
-void
BeginForeignScan (ForeignScanState *node,
int eflags);
</programlisting>
<structname>ForeignScanState</> node (in particular, from the underlying
<structname>ForeignScan</> plan node, which contains any FDW-private
information provided by <function>GetForeignPlan</>).
+ <literal>eflags</> contains flag bits describing the executor's
+ operating mode for this plan node.
</para>
<para>
<para>
Note that <productname>PostgreSQL</productname>'s executor doesn't care
- whether the rows returned violate the <literal>NOT NULL</literal>
- constraints which were defined on the foreign table columns - but the
- planner does care, and may optimize queries incorrectly if
+ whether the rows returned violate any <literal>NOT NULL</literal>
+ constraints that were defined on the foreign table columns — but
+ the planner does care, and may optimize queries incorrectly if
<literal>NULL</> values are present in a column declared not to contain
them. If a <literal>NULL</> value is encountered when the user has
declared that none should be present, it may be appropriate to raise an
to remote servers should be cleaned up.
</para>
+ </sect2>
+
+ <sect2 id="fdw-callbacks-update">
+ <title>FDW Routines For Updating Foreign Tables</title>
+
+ <para>
+ If an FDW supports writable foreign tables, it should provide
+ some or all of the following callback functions depending on
+ the needs and capabilities of the FDW:
+ </para>
+
+ <para>
+<programlisting>
+void
+AddForeignUpdateTargets (Query *parsetree,
+ RangeTblEntry *target_rte,
+ Relation target_relation);
+</programlisting>
+
+ <command>UPDATE</> and <command>DELETE</> operations are performed
+ against rows previously fetched by the table-scanning functions. The
+ FDW may need extra information, such as a row ID or the values of
+ primary-key columns, to ensure that it can identify the exact row to
+ update or delete. To support that, this function can add extra hidden,
+ or <quote>junk</>, target columns to the list of columns that are to be
+ retrieved from the foreign table during an <command>UPDATE</> or
+ <command>DELETE</>.
+ </para>
+
+ <para>
+ To do that, add <structname>TargetEntry</> items to
+ <literal>parsetree->targetList</>, containing expressions for the
+ extra values to be fetched. Each such entry must be marked
+ <structfield>resjunk</> = <literal>true</>, and must have a distinct
+ <structfield>resname</> that will identify it at execution time.
+ Avoid using names matching <literal>ctid<replaceable>N</></literal> or
+ <literal>wholerow<replaceable>N</></literal>, as the core system can
+ generate junk columns of these names.
+ </para>
+
+ <para>
+ This function is called in the rewriter, not the planner, so the
+ information available is a bit different from that available to the
+ planning routines.
+ <literal>parsetree</> is the parse tree for the <command>UPDATE</> or
+ <command>DELETE</> command, while <literal>target_rte</> and
+ <literal>target_relation</> describe the target foreign table.
+ </para>
+
+ <para>
+ If the <function>AddForeignUpdateTargets</> pointer is set to
+ <literal>NULL</>, no extra target expressions are added.
+ (This will make it impossible to implement <command>DELETE</>
+ operations, though <command>UPDATE</> may still be feasible if the FDW
+ relies on an unchanging primary key to identify rows.)
+ </para>
+
+ <para>
+<programlisting>
+List *
+PlanForeignModify (PlannerInfo *root,
+ ModifyTable *plan,
+ Index resultRelation,
+ int subplan_index);
+</programlisting>
+
+ Perform any additional planning actions needed for an insert, update, or
+ delete on a foreign table. This function generates the FDW-private
+ information that will be attached to the <structname>ModifyTable</> plan
+ node that performs the update action. This private information must
+ have the form of a <literal>List</>, and will be delivered to
+ <function>BeginForeignModify</> during the execution stage.
+ </para>
+
+ <para>
+ <literal>root</> is the planner's global information about the query.
+ <literal>plan</> is the <structname>ModifyTable</> plan node, which is
+ complete except for the <structfield>fdwPrivLists</> field.
+ <literal>resultRelation</> identifies the target foreign table by its
+ rangetable index. <literal>subplan_index</> identifies which target of
+ the <structname>ModifyTable</> plan node this is, counting from zero;
+ use this if you want to index into <literal>node->plans</> or other
+ substructure of the <literal>plan</> node.
+ </para>
+
+ <para>
+ See <xref linkend="fdw-planning"> for additional information.
+ </para>
+
+ <para>
+ If the <function>PlanForeignModify</> pointer is set to
+ <literal>NULL</>, no additional plan-time actions are taken, and the
+ <literal>fdw_private</> list delivered to
+ <function>BeginForeignModify</> will be NIL.
+ </para>
+
+ <para>
+<programlisting>
+void
+BeginForeignModify (ModifyTableState *mtstate,
+ ResultRelInfo *rinfo,
+ List *fdw_private,
+ int subplan_index,
+ int eflags);
+</programlisting>
+
+ Begin executing a foreign table modification operation. This routine is
+ called during executor startup. It should perform any initialization
+ needed prior to the actual table modifications. Subsequently,
+ <function>ExecForeignInsert</>, <function>ExecForeignUpdate</> or
+ <function>ExecForeignDelete</> will be called for each tuple to be
+ inserted, updated, or deleted.
+ </para>
+
+ <para>
+ <literal>mtstate</> is the overall state of the
+ <structname>ModifyTable</> plan node being executed; global data about
+ the plan and execution state is available via this structure.
+ <literal>rinfo</> is the <structname>ResultRelInfo</> struct describing
+ the target foreign table. (The <structfield>ri_FdwState</> field of
+ <structname>ResultRelInfo</> is available for the FDW to store any
+ private state it needs for this operation.)
+ <literal>fdw_private</> contains the private data generated by
+ <function>PlanForeignModify</>, if any.
+ <literal>subplan_index</> identifies which target of
+ the <structname>ModifyTable</> plan node this is.
+ <literal>eflags</> contains flag bits describing the executor's
+ operating mode for this plan node.
+ </para>
+
+ <para>
+ Note that when <literal>(eflags & EXEC_FLAG_EXPLAIN_ONLY)</> is
+ true, this function should not perform any externally-visible actions;
+ it should only do the minimum required to make the node state valid
+ for <function>ExplainForeignModify</> and <function>EndForeignModify</>.
+ </para>
+
+ <para>
+ If the <function>BeginForeignModify</> pointer is set to
+ <literal>NULL</>, no action is taken during executor startup.
+ </para>
+
+ <para>
+<programlisting>
+TupleTableSlot *
+ExecForeignInsert (EState *estate,
+ ResultRelInfo *rinfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+</programlisting>
+
+ Insert one tuple into the foreign table.
+ <literal>estate</> is global execution state for the query.
+ <literal>rinfo</> is the <structname>ResultRelInfo</> struct describing
+ the target foreign table.
+ <literal>slot</> contains the tuple to be inserted; it will match the
+ rowtype definition of the foreign table.
+ <literal>planSlot</> contains the tuple that was generated by the
+ <structname>ModifyTable</> plan node's subplan; it differs from
+ <literal>slot</> in possibly containing additional <quote>junk</>
+ columns. (The <literal>planSlot</> is typically of little interest
+ for <command>INSERT</> cases, but is provided for completeness.)
+ </para>
+
+ <para>
+ The return value is either a slot containing the data that was actually
+ inserted (this might differ from the data supplied, for example as a
+ result of trigger actions), or NULL if no row was actually inserted
+ (again, typically as a result of triggers). The passed-in
+ <literal>slot</> can be re-used for this purpose.
+ </para>
+
+ <para>
+ The data in the returned slot is used only if the <command>INSERT</>
+ query has a <literal>RETURNING</> clause. Hence, the FDW could choose
+ to optimize away returning some or all columns depending on the contents
+ of the <literal>RETURNING</> clause. However, some slot must be
+ returned to indicate success, or the query's reported rowcount will be
+ wrong.
+ </para>
+
+ <para>
+ If the <function>ExecForeignInsert</> pointer is set to
+ <literal>NULL</>, attempts to insert into the foreign table will fail
+ with an error message.
+ </para>
+
+ <para>
+<programlisting>
+TupleTableSlot *
+ExecForeignUpdate (EState *estate,
+ ResultRelInfo *rinfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+</programlisting>
+
+ Update one tuple in the foreign table.
+ <literal>estate</> is global execution state for the query.
+ <literal>rinfo</> is the <structname>ResultRelInfo</> struct describing
+ the target foreign table.
+ <literal>slot</> contains the new data for the tuple; it will match the
+ rowtype definition of the foreign table.
+ <literal>planSlot</> contains the tuple that was generated by the
+ <structname>ModifyTable</> plan node's subplan; it differs from
+ <literal>slot</> in possibly containing additional <quote>junk</>
+ columns. In particular, any junk columns that were requested by
+ <function>AddForeignUpdateTargets</> will be available from this slot.
+ </para>
+
+ <para>
+ The return value is either a slot containing the row as it was actually
+ updated (this might differ from the data supplied, for example as a
+ result of trigger actions), or NULL if no row was actually updated
+ (again, typically as a result of triggers). The passed-in
+ <literal>slot</> can be re-used for this purpose.
+ </para>
+
+ <para>
+ The data in the returned slot is used only if the <command>UPDATE</>
+ query has a <literal>RETURNING</> clause. Hence, the FDW could choose
+ to optimize away returning some or all columns depending on the contents
+ of the <literal>RETURNING</> clause. However, some slot must be
+ returned to indicate success, or the query's reported rowcount will be
+ wrong.
+ </para>
+
+ <para>
+ If the <function>ExecForeignUpdate</> pointer is set to
+ <literal>NULL</>, attempts to update the foreign table will fail
+ with an error message.
+ </para>
+
+ <para>
+<programlisting>
+TupleTableSlot *
+ExecForeignDelete (EState *estate,
+ ResultRelInfo *rinfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+</programlisting>
+
+ Delete one tuple from the foreign table.
+ <literal>estate</> is global execution state for the query.
+ <literal>rinfo</> is the <structname>ResultRelInfo</> struct describing
+ the target foreign table.
+ <literal>slot</> contains nothing useful upon call, but can be used to
+ hold the returned tuple.
+ <literal>planSlot</> contains the tuple that was generated by the
+ <structname>ModifyTable</> plan node's subplan; in particular, it will
+ carry any junk columns that were requested by
+ <function>AddForeignUpdateTargets</>. The junk column(s) must be used
+ to identify the tuple to be deleted.
+ </para>
+
+ <para>
+ The return value is either a slot containing the row that was deleted,
+ or NULL if no row was deleted (typically as a result of triggers). The
+ passed-in <literal>slot</> can be used to hold the tuple to be returned.
+ </para>
+
+ <para>
+ The data in the returned slot is used only if the <command>DELETE</>
+ query has a <literal>RETURNING</> clause. Hence, the FDW could choose
+ to optimize away returning some or all columns depending on the contents
+ of the <literal>RETURNING</> clause. However, some slot must be
+ returned to indicate success, or the query's reported rowcount will be
+ wrong.
+ </para>
+
+ <para>
+ If the <function>ExecForeignDelete</> pointer is set to
+ <literal>NULL</>, attempts to delete from the foreign table will fail
+ with an error message.
+ </para>
+
+ <para>
+<programlisting>
+void
+EndForeignModify (EState *estate,
+ ResultRelInfo *rinfo);
+</programlisting>
+
+ End the table update and release resources. It is normally not important
+ to release palloc'd memory, but for example open files and connections
+ to remote servers should be cleaned up.
+ </para>
+
+ <para>
+ If the <function>EndForeignModify</> pointer is set to
+ <literal>NULL</>, no action is taken during executor shutdown.
+ </para>
+
+ </sect2>
+
+ <sect2 id="fdw-callbacks-explain">
+ <title>FDW Routines for <command>EXPLAIN</></title>
+
+ <para>
+<programlisting>
+void
+ExplainForeignScan (ForeignScanState *node,
+ ExplainState *es);
+</programlisting>
+
+ Print additional <command>EXPLAIN</> output for a foreign table scan.
+ This function can call <function>ExplainPropertyText</> and
+ related functions to add fields to the <command>EXPLAIN</> output.
+ The flag fields in <literal>es</> can be used to determine what to
+ print, and the state of the <structname>ForeignScanState</> node
+ can be inspected to provide run-time statistics in the <command>EXPLAIN
+ ANALYZE</> case.
+ </para>
+
+ <para>
+ If the <function>ExplainForeignScan</> pointer is set to
+ <literal>NULL</>, no additional information is printed during
+ <command>EXPLAIN</>.
+ </para>
+
+ <para>
+<programlisting>
+void
+ExplainForeignModify (ModifyTableState *mtstate,
+ ResultRelInfo *rinfo,
+ List *fdw_private,
+ int subplan_index,
+ struct ExplainState *es);
+</programlisting>
+
+ Print additional <command>EXPLAIN</> output for a foreign table update.
+ This function can call <function>ExplainPropertyText</> and
+ related functions to add fields to the <command>EXPLAIN</> output.
+ The flag fields in <literal>es</> can be used to determine what to
+ print, and the state of the <structname>ModifyTableState</> node
+ can be inspected to provide run-time statistics in the <command>EXPLAIN
+ ANALYZE</> case. The first four arguments are the same as for
+ <function>BeginForeignModify</>.
+ </para>
+
+ <para>
+ If the <function>ExplainForeignModify</> pointer is set to
+ <literal>NULL</>, no additional information is printed during
+ <command>EXPLAIN</>.
+ </para>
+
+ </sect2>
+
+ <sect2 id="fdw-callbacks-analyze">
+ <title>FDW Routines for <command>ANALYZE</></title>
+
<para>
<programlisting>
bool
to a function that will collect sample rows from the table in
<parameter>func</>, plus the estimated size of the table in pages in
<parameter>totalpages</>. Otherwise, return <literal>false</>.
+ </para>
+
+ <para>
If the FDW does not support collecting statistics for any tables, the
<function>AnalyzeForeignTable</> pointer can be set to <literal>NULL</>.
</para>
if the FDW does not have any concept of dead rows.)
</para>
- <para>
- The <structname>FdwRoutine</> struct type is declared in
- <filename>src/include/foreign/fdwapi.h</>, which see for additional
- details.
- </para>
+ </sect2>
</sect1>
<para>
The FDW callback functions <function>GetForeignRelSize</>,
- <function>GetForeignPaths</>, and <function>GetForeignPlan</> must fit
- into the workings of the <productname>PostgreSQL</> planner. Here are
- some notes about what they must do.
+ <function>GetForeignPaths</>, <function>GetForeignPlan</>, and
+ <function>PlanForeignModify</> must fit into the workings of the
+ <productname>PostgreSQL</> planner. Here are some notes about what
+ they must do.
</para>
<para>
same as for an ordinary restriction clause.
</para>
+ <para>
+ When planning an <command>UPDATE</> or <command>DELETE</>,
+ <function>PlanForeignModify</> can look up the <structname>RelOptInfo</>
+ struct for the foreign table and make use of the
+ <literal>baserel->fdw_private</> data previously created by the
+ scan-planning functions. However, in <command>INSERT</> the target
+ table is not scanned so there is no <structname>RelOptInfo</> for it.
+ </para>
+
+ <para>
+ For an <command>UPDATE</> or <command>DELETE</> against an external data
+ source that supports concurrent updates, it is recommended that the
+ <literal>ForeignScan</> operation lock the rows that it fetches, perhaps
+ via the equivalent of <command>SELECT FOR UPDATE</>. The FDW may also
+ choose to lock rows at fetch time when the foreign table is referenced
+ in a <command>SELECT FOR UPDATE/SHARE</>; if it does not, the
+ <literal>FOR UPDATE</> or <literal>FOR SHARE</> option is essentially a
+ no-op so far as the foreign table is concerned. This behavior may yield
+ semantics slightly different from operations on local tables, where row
+ locking is customarily delayed as long as possible: remote rows may get
+ locked even though they subsequently fail locally-applied restriction or
+ join conditions. However, matching the local semantics exactly would
+ require an additional remote access for every row, and might be
+ impossible anyway depending on what locking semantics the external data
+ source provides.
+ </para>
+
</sect1>
</chapter>
files in the server's file system. Data files must be in a format
that can be read by <command>COPY FROM</command>;
see <xref linkend="sql-copy"> for details.
+ Access to such data files is currently read-only.
</para>
<para>
<example>
<title id="csvlog-fdw">Create a Foreign Table for PostgreSQL CSV Logs</title>
-
+
<para>
One of the obvious uses for the <literal>file_fdw</> is to make
the PostgreSQL activity log available as a table for querying. To
</para>
<para>
- That's it — now you can query your log directly. In production, of course,
- you would need to define some way to adjust to log rotation.
+ That's it — now you can query your log directly. In production, of
+ course, you would need to define some way to deal with log rotation.
</para>
</example>
<para>
Now you need only <command>SELECT</> from a foreign table to access
- the data stored in its underlying remote table.
+ the data stored in its underlying remote table. You can also modify
+ the remote table using <command>INSERT</>, <command>UPDATE</>, or
+ <command>DELETE</>. (Of course, the remote user you have specified
+ in your user mapping must have privileges to do these things.)
</para>
<para>
<title>Notes</title>
<para>
- At the moment, the foreign-data wrapper functionality is rudimentary.
- There is no support for updating a foreign table, and optimization of
- queries is primitive (and mostly left to the wrapper, too).
+ <productname>PostgreSQL</>'s foreign-data functionality is still under
+ active development. Optimization of queries is primitive (and mostly left
+ to the wrapper, too). Thus, there is considerable room for future
+ performance improvements.
</para>
</refsect1>
9075-9 (SQL/MED), with the exception that the <literal>HANDLER</literal>
and <literal>VALIDATOR</literal> clauses are extensions and the standard
clauses <literal>LIBRARY</literal> and <literal>LANGUAGE</literal>
- are not implemented in PostgreSQL.
+ are not implemented in <productname>PostgreSQL</>.
</para>
<para>
<member><xref linkend="sql-dropforeigndatawrapper"></member>
<member><xref linkend="sql-createserver"></member>
<member><xref linkend="sql-createusermapping"></member>
+ <member><xref linkend="sql-createforeigntable"></member>
</simplelist>
</refsect1>
* here that basically duplicated execUtils.c ...)
*/
resultRelInfo = makeNode(ResultRelInfo);
- resultRelInfo->ri_RangeTableIndex = 1; /* dummy */
- resultRelInfo->ri_RelationDesc = cstate->rel;
- resultRelInfo->ri_TrigDesc = CopyTriggerDesc(cstate->rel->trigdesc);
- if (resultRelInfo->ri_TrigDesc)
- {
- resultRelInfo->ri_TrigFunctions = (FmgrInfo *)
- palloc0(resultRelInfo->ri_TrigDesc->numtriggers * sizeof(FmgrInfo));
- resultRelInfo->ri_TrigWhenExprs = (List **)
- palloc0(resultRelInfo->ri_TrigDesc->numtriggers * sizeof(List *));
- }
- resultRelInfo->ri_TrigInstrument = NULL;
+ InitResultRelInfo(resultRelInfo,
+ cstate->rel,
+ 1, /* dummy rangetable index */
+ 0);
ExecOpenIndices(resultRelInfo);
static void ExplainScanTarget(Scan *plan, ExplainState *es);
static void ExplainModifyTarget(ModifyTable *plan, ExplainState *es);
static void ExplainTargetRel(Plan *plan, Index rti, ExplainState *es);
+static void show_modifytable_info(ModifyTableState *mtstate, ExplainState *es);
static void ExplainMemberNodes(List *plans, PlanState **planstates,
List *ancestors, ExplainState *es);
static void ExplainSubPlans(List *plans, List *ancestors,
show_instrumentation_count("Rows Removed by Filter", 1,
planstate, es);
break;
+ case T_ModifyTable:
+ show_modifytable_info((ModifyTableState *) planstate, es);
+ break;
case T_Hash:
show_hash_info((HashState *) planstate, es);
break;
FdwRoutine *fdwroutine = fsstate->fdwroutine;
/* Let the FDW emit whatever fields it wants */
- fdwroutine->ExplainForeignScan(fsstate, es);
+ if (fdwroutine->ExplainForeignScan != NULL)
+ fdwroutine->ExplainForeignScan(fsstate, es);
}
/*
}
}
+/*
+ * Show extra information for a ModifyTable node
+ */
+static void
+show_modifytable_info(ModifyTableState *mtstate, ExplainState *es)
+{
+ FdwRoutine *fdwroutine = mtstate->resultRelInfo->ri_FdwRoutine;
+
+ /*
+ * If the first target relation is a foreign table, call its FDW to
+ * display whatever additional fields it wants to. For now, we ignore the
+ * possibility of other targets being foreign tables, although the API for
+ * ExplainForeignModify is designed to allow them to be processed.
+ */
+ if (fdwroutine != NULL &&
+ fdwroutine->ExplainForeignModify != NULL)
+ {
+ ModifyTable *node = (ModifyTable *) mtstate->ps.plan;
+ List *fdw_private = (List *) linitial(node->fdwPrivLists);
+
+ fdwroutine->ExplainForeignModify(mtstate,
+ mtstate->resultRelInfo,
+ fdw_private,
+ 0,
+ es);
+ }
+}
+
/*
* Explain the constituent plans of a ModifyTable, Append, MergeAppend,
* BitmapAnd, or BitmapOr node.
#include "catalog/namespace.h"
#include "commands/trigger.h"
#include "executor/execdebug.h"
+#include "foreign/fdwapi.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "optimizer/clauses.h"
CheckValidResultRel(Relation resultRel, CmdType operation)
{
TriggerDesc *trigDesc = resultRel->trigdesc;
+ FdwRoutine *fdwroutine;
switch (resultRel->rd_rel->relkind)
{
RelationGetRelationName(resultRel))));
break;
case RELKIND_FOREIGN_TABLE:
- ereport(ERROR,
- (errcode(ERRCODE_WRONG_OBJECT_TYPE),
- errmsg("cannot change foreign table \"%s\"",
- RelationGetRelationName(resultRel))));
+ /* Okay only if the FDW supports it */
+ fdwroutine = GetFdwRoutineForRelation(resultRel, false);
+ switch (operation)
+ {
+ case CMD_INSERT:
+ if (fdwroutine->ExecForeignInsert == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot insert into foreign table \"%s\"",
+ RelationGetRelationName(resultRel))));
+ break;
+ case CMD_UPDATE:
+ if (fdwroutine->ExecForeignUpdate == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot update foreign table \"%s\"",
+ RelationGetRelationName(resultRel))));
+ break;
+ case CMD_DELETE:
+ if (fdwroutine->ExecForeignDelete == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot delete from foreign table \"%s\"",
+ RelationGetRelationName(resultRel))));
+ break;
+ default:
+ elog(ERROR, "unrecognized CmdType: %d", (int) operation);
+ break;
+ }
break;
default:
ereport(ERROR,
RelationGetRelationName(rel))));
break;
case RELKIND_FOREIGN_TABLE:
- /* Perhaps we can support this someday, but not today */
+ /* Should not get here */
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot lock rows in foreign table \"%s\"",
resultRelInfo->ri_TrigWhenExprs = NULL;
resultRelInfo->ri_TrigInstrument = NULL;
}
+ if (resultRelationDesc->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
+ resultRelInfo->ri_FdwRoutine = GetFdwRoutineForRelation(resultRelationDesc, true);
+ else
+ resultRelInfo->ri_FdwRoutine = NULL;
+ resultRelInfo->ri_FdwState = NULL;
resultRelInfo->ri_ConstraintExprs = NULL;
resultRelInfo->ri_junkFilter = NULL;
resultRelInfo->ri_projectReturning = NULL;
scanstate->ss.ss_currentRelation = currentRelation;
/*
- * get the scan type from the relation descriptor.
+ * get the scan type from the relation descriptor. (XXX at some point we
+ * might want to let the FDW editorialize on the scan tupdesc.)
*/
ExecAssignScanType(&scanstate->ss, RelationGetDescr(currentRelation));
#include "commands/trigger.h"
#include "executor/executor.h"
#include "executor/nodeModifyTable.h"
+#include "foreign/fdwapi.h"
#include "miscadmin.h"
#include "nodes/nodeFuncs.h"
#include "storage/bufmgr.h"
newId = InvalidOid;
}
+ else if (resultRelInfo->ri_FdwRoutine)
+ {
+ /*
+ * insert into foreign table: let the FDW do it
+ */
+ slot = resultRelInfo->ri_FdwRoutine->ExecForeignInsert(estate,
+ resultRelInfo,
+ slot,
+ planSlot);
+
+ if (slot == NULL) /* "do nothing" */
+ return NULL;
+
+ /* FDW might have changed tuple */
+ tuple = ExecMaterializeSlot(slot);
+
+ newId = InvalidOid;
+ }
else
{
/*
* When deleting from a table, tupleid identifies the tuple to
* delete and oldtuple is NULL. When deleting from a view,
* oldtuple is passed to the INSTEAD OF triggers and identifies
- * what to delete, and tupleid is invalid.
+ * what to delete, and tupleid is invalid. When deleting from a
+ * foreign table, both tupleid and oldtuple are NULL; the FDW has
+ * to figure out which row to delete using data from the planSlot.
*
* Returns RETURNING result if any, otherwise NULL.
* ----------------------------------------------------------------
Relation resultRelationDesc;
HTSU_Result result;
HeapUpdateFailureData hufd;
+ TupleTableSlot *slot = NULL;
/*
* get information on the (current) result relation
if (!dodelete) /* "do nothing" */
return NULL;
}
+ else if (resultRelInfo->ri_FdwRoutine)
+ {
+ /*
+ * delete from foreign table: let the FDW do it
+ *
+ * We offer the trigger tuple slot as a place to store RETURNING data,
+ * although the FDW can return some other slot if it wants. Set up
+ * the slot's tupdesc so the FDW doesn't need to do that for itself.
+ */
+ slot = estate->es_trig_tuple_slot;
+ if (slot->tts_tupleDescriptor != RelationGetDescr(resultRelationDesc))
+ ExecSetSlotDescriptor(slot, RelationGetDescr(resultRelationDesc));
+
+ slot = resultRelInfo->ri_FdwRoutine->ExecForeignDelete(estate,
+ resultRelInfo,
+ slot,
+ planSlot);
+
+ if (slot == NULL) /* "do nothing" */
+ return NULL;
+ }
else
{
/*
* We have to put the target tuple into a slot, which means first we
* gotta fetch it. We can use the trigger tuple slot.
*/
- TupleTableSlot *slot = estate->es_trig_tuple_slot;
TupleTableSlot *rslot;
HeapTupleData deltuple;
Buffer delbuffer;
- if (oldtuple != NULL)
+ if (resultRelInfo->ri_FdwRoutine)
{
- deltuple.t_data = oldtuple;
- deltuple.t_len = HeapTupleHeaderGetDatumLength(oldtuple);
- ItemPointerSetInvalid(&(deltuple.t_self));
- deltuple.t_tableOid = InvalidOid;
+ /* FDW must have provided a slot containing the deleted row */
+ Assert(!TupIsNull(slot));
delbuffer = InvalidBuffer;
}
else
{
- deltuple.t_self = *tupleid;
- if (!heap_fetch(resultRelationDesc, SnapshotAny,
- &deltuple, &delbuffer, false, NULL))
- elog(ERROR, "failed to fetch deleted tuple for DELETE RETURNING");
- }
+ slot = estate->es_trig_tuple_slot;
+ if (oldtuple != NULL)
+ {
+ deltuple.t_data = oldtuple;
+ deltuple.t_len = HeapTupleHeaderGetDatumLength(oldtuple);
+ ItemPointerSetInvalid(&(deltuple.t_self));
+ deltuple.t_tableOid = InvalidOid;
+ delbuffer = InvalidBuffer;
+ }
+ else
+ {
+ deltuple.t_self = *tupleid;
+ if (!heap_fetch(resultRelationDesc, SnapshotAny,
+ &deltuple, &delbuffer, false, NULL))
+ elog(ERROR, "failed to fetch deleted tuple for DELETE RETURNING");
+ }
- if (slot->tts_tupleDescriptor != RelationGetDescr(resultRelationDesc))
- ExecSetSlotDescriptor(slot, RelationGetDescr(resultRelationDesc));
- ExecStoreTuple(&deltuple, slot, InvalidBuffer, false);
+ if (slot->tts_tupleDescriptor != RelationGetDescr(resultRelationDesc))
+ ExecSetSlotDescriptor(slot, RelationGetDescr(resultRelationDesc));
+ ExecStoreTuple(&deltuple, slot, InvalidBuffer, false);
+ }
rslot = ExecProcessReturning(resultRelInfo->ri_projectReturning,
slot, planSlot);
+ /*
+ * Before releasing the target tuple again, make sure rslot has a
+ * local copy of any pass-by-reference values.
+ */
+ ExecMaterializeSlot(rslot);
+
ExecClearTuple(slot);
if (BufferIsValid(delbuffer))
ReleaseBuffer(delbuffer);
* When updating a table, tupleid identifies the tuple to
* update and oldtuple is NULL. When updating a view, oldtuple
* is passed to the INSTEAD OF triggers and identifies what to
- * update, and tupleid is invalid.
+ * update, and tupleid is invalid. When updating a foreign table,
+ * both tupleid and oldtuple are NULL; the FDW has to figure out
+ * which row to update using data from the planSlot.
*
* Returns RETURNING result if any, otherwise NULL.
* ----------------------------------------------------------------
/* trigger might have changed tuple */
tuple = ExecMaterializeSlot(slot);
}
+ else if (resultRelInfo->ri_FdwRoutine)
+ {
+ /*
+ * update in foreign table: let the FDW do it
+ */
+ slot = resultRelInfo->ri_FdwRoutine->ExecForeignUpdate(estate,
+ resultRelInfo,
+ slot,
+ planSlot);
+
+ if (slot == NULL) /* "do nothing" */
+ return NULL;
+
+ /* FDW might have changed tuple */
+ tuple = ExecMaterializeSlot(slot);
+ }
else
{
LockTupleMode lockmode;
*/
if (operation == CMD_UPDATE || operation == CMD_DELETE)
{
+ char relkind;
Datum datum;
bool isNull;
- if (resultRelInfo->ri_RelationDesc->rd_rel->relkind == RELKIND_RELATION)
+ relkind = resultRelInfo->ri_RelationDesc->rd_rel->relkind;
+ if (relkind == RELKIND_RELATION)
{
datum = ExecGetJunkAttribute(slot,
junkfilter->jf_junkAttNo,
* ctid!! */
tupleid = &tuple_ctid;
}
+ else if (relkind == RELKIND_FOREIGN_TABLE)
+ {
+ /* do nothing; FDW must fetch any junk attrs it wants */
+ }
else
{
datum = ExecGetJunkAttribute(slot,
estate->es_result_relation_info = resultRelInfo;
mtstate->mt_plans[i] = ExecInitNode(subplan, estate, eflags);
+ /* Also let FDWs init themselves for foreign-table result rels */
+ if (resultRelInfo->ri_FdwRoutine != NULL &&
+ resultRelInfo->ri_FdwRoutine->BeginForeignModify != NULL)
+ {
+ List *fdw_private = (List *) list_nth(node->fdwPrivLists, i);
+
+ resultRelInfo->ri_FdwRoutine->BeginForeignModify(mtstate,
+ resultRelInfo,
+ fdw_private,
+ i,
+ eflags);
+ }
+
resultRelInfo++;
i++;
}
if (operation == CMD_UPDATE || operation == CMD_DELETE)
{
/* For UPDATE/DELETE, find the appropriate junk attr now */
- if (resultRelInfo->ri_RelationDesc->rd_rel->relkind == RELKIND_RELATION)
+ char relkind;
+
+ relkind = resultRelInfo->ri_RelationDesc->rd_rel->relkind;
+ if (relkind == RELKIND_RELATION)
{
j->jf_junkAttNo = ExecFindJunkAttribute(j, "ctid");
if (!AttributeNumberIsValid(j->jf_junkAttNo))
elog(ERROR, "could not find junk ctid column");
}
+ else if (relkind == RELKIND_FOREIGN_TABLE)
+ {
+ /* FDW must fetch any junk attrs it wants */
+ }
else
{
j->jf_junkAttNo = ExecFindJunkAttribute(j, "wholerow");
{
int i;
+ /*
+ * Allow any FDWs to shut down
+ */
+ for (i = 0; i < node->mt_nplans; i++)
+ {
+ ResultRelInfo *resultRelInfo = node->resultRelInfo + i;
+
+ if (resultRelInfo->ri_FdwRoutine != NULL &&
+ resultRelInfo->ri_FdwRoutine->EndForeignModify != NULL)
+ resultRelInfo->ri_FdwRoutine->EndForeignModify(node->ps.state,
+ resultRelInfo);
+ }
+
/*
* Free the exprcontext
*/
COPY_SCALAR_FIELD(resultRelIndex);
COPY_NODE_FIELD(plans);
COPY_NODE_FIELD(returningLists);
+ COPY_NODE_FIELD(fdwPrivLists);
COPY_NODE_FIELD(rowMarks);
COPY_SCALAR_FIELD(epqParam);
WRITE_INT_FIELD(resultRelIndex);
WRITE_NODE_FIELD(plans);
WRITE_NODE_FIELD(returningLists);
+ WRITE_NODE_FIELD(fdwPrivLists);
WRITE_NODE_FIELD(rowMarks);
WRITE_INT_FIELD(epqParam);
}
#include <math.h>
#include "access/skey.h"
+#include "catalog/pg_class.h"
#include "foreign/fdwapi.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
* to make it look better sometime.
*/
ModifyTable *
-make_modifytable(CmdType operation, bool canSetTag,
+make_modifytable(PlannerInfo *root,
+ CmdType operation, bool canSetTag,
List *resultRelations,
List *subplans, List *returningLists,
List *rowMarks, int epqParam)
ModifyTable *node = makeNode(ModifyTable);
Plan *plan = &node->plan;
double total_size;
+ List *fdw_private_list;
ListCell *subnode;
+ ListCell *lc;
+ int i;
Assert(list_length(resultRelations) == list_length(subplans));
Assert(returningLists == NIL ||
node->rowMarks = rowMarks;
node->epqParam = epqParam;
+ /*
+ * For each result relation that is a foreign table, allow the FDW to
+ * construct private plan data, and accumulate it all into a list.
+ */
+ fdw_private_list = NIL;
+ i = 0;
+ foreach(lc, resultRelations)
+ {
+ Index rti = lfirst_int(lc);
+ FdwRoutine *fdwroutine;
+ List *fdw_private;
+
+ /*
+ * If possible, we want to get the FdwRoutine from our RelOptInfo for
+ * the table. But sometimes we don't have a RelOptInfo and must get
+ * it the hard way. (In INSERT, the target relation is not scanned,
+ * so it's not a baserel; and there are also corner cases for
+ * updatable views where the target rel isn't a baserel.)
+ */
+ if (rti < root->simple_rel_array_size &&
+ root->simple_rel_array[rti] != NULL)
+ {
+ RelOptInfo *resultRel = root->simple_rel_array[rti];
+
+ fdwroutine = resultRel->fdwroutine;
+ }
+ else
+ {
+ RangeTblEntry *rte = planner_rt_fetch(rti, root);
+
+ Assert(rte->rtekind == RTE_RELATION);
+ if (rte->relkind == RELKIND_FOREIGN_TABLE)
+ fdwroutine = GetFdwRoutineByRelId(rte->relid);
+ else
+ fdwroutine = NULL;
+ }
+
+ if (fdwroutine != NULL &&
+ fdwroutine->PlanForeignModify != NULL)
+ fdw_private = fdwroutine->PlanForeignModify(root, node, rti, i);
+ else
+ fdw_private = NIL;
+ fdw_private_list = lappend(fdw_private_list, fdw_private);
+ i++;
+ }
+ node->fdwPrivLists = fdw_private_list;
+
return node;
}
else
rowMarks = root->rowMarks;
- plan = (Plan *) make_modifytable(parse->commandType,
+ plan = (Plan *) make_modifytable(root,
+ parse->commandType,
parse->canSetTag,
list_make1_int(parse->resultRelation),
list_make1(plan),
rowMarks = root->rowMarks;
/* And last, tack on a ModifyTable node to do the UPDATE/DELETE work */
- return (Plan *) make_modifytable(parse->commandType,
+ return (Plan *) make_modifytable(root,
+ parse->commandType,
parse->canSetTag,
resultRelations,
subplans,
if (rte->rtekind != RTE_RELATION)
continue;
+ /*
+ * Similarly, ignore RowMarkClauses for foreign tables; foreign tables
+ * will instead get ROW_MARK_COPY items in the next loop. (FDWs might
+ * choose to do something special while fetching their rows, but that
+ * is of no concern here.)
+ */
+ if (rte->relkind == RELKIND_FOREIGN_TABLE)
+ continue;
+
rels = bms_del_member(rels, rc->rti);
newrc = makeNode(PlanRowMark);
* For INSERT and UPDATE queries, the targetlist must contain an entry for
* each attribute of the target relation in the correct order. For all query
* types, we may need to add junk tlist entries for Vars used in the RETURNING
- * list and row ID information needed for EvalPlanQual checking.
+ * list and row ID information needed for SELECT FOR UPDATE locking and/or
+ * EvalPlanQual checking.
*
* NOTE: the rewriter's rewriteTargetListIU and rewriteTargetListUD
* routines also do preprocessing of the targetlist. The division of labor
/*
- * Check for features that are not supported together with FOR [KEY] UPDATE/SHARE.
+ * Check for features that are not supported with FOR [KEY] UPDATE/SHARE.
*
* exported so planner can check again after rewriting, query pullup, etc
*/
switch (rte->rtekind)
{
case RTE_RELATION:
- /* ignore foreign tables */
- if (rte->relkind == RELKIND_FOREIGN_TABLE)
- break;
applyLockingClause(qry, i,
lc->strength, lc->noWait, pushedDown);
rte->requiredPerms |= ACL_SELECT_FOR_UPDATE;
lc->strength, lc->noWait, pushedDown);
/*
- * FOR [KEY] UPDATE/SHARE of subquery is propagated to all of
+ * FOR UPDATE/SHARE of subquery is propagated to all of
* subquery's rels, too. We could do this later (based on
* the marking of the subquery RTE) but it is convenient
* to have local knowledge in each query level about which
switch (rte->rtekind)
{
case RTE_RELATION:
- if (rte->relkind == RELKIND_FOREIGN_TABLE)
- ereport(ERROR,
- (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
- errmsg("row-level locks cannot be used with foreign table \"%s\"",
- rte->eref->aliasname),
- parser_errposition(pstate, thisrel->location)));
applyLockingClause(qry, i,
lc->strength, lc->noWait,
pushedDown);
#include "access/sysattr.h"
#include "catalog/pg_type.h"
#include "commands/trigger.h"
+#include "foreign/fdwapi.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "parser/analyze.h"
* is a regular table, the junk TLE emits the ctid attribute of the original
* row. When the target relation is a view, there is no ctid, so we instead
* emit a whole-row Var that will contain the "old" values of the view row.
+ * If it's a foreign table, we let the FDW decide what to add.
*
* For UPDATE queries, this is applied after rewriteTargetListIU. The
* ordering isn't actually critical at the moment.
attrname = "ctid";
}
+ else if (target_relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
+ {
+ /*
+ * Let the foreign table's FDW add whatever junk TLEs it wants.
+ */
+ FdwRoutine *fdwroutine;
+
+ fdwroutine = GetFdwRoutineForRelation(target_relation, false);
+
+ if (fdwroutine->AddForeignUpdateTargets != NULL)
+ fdwroutine->AddForeignUpdateTargets(parsetree, target_rte,
+ target_relation);
+
+ return;
+ }
else
{
/*
if (rte->rtekind == RTE_RELATION)
{
- /* ignore foreign tables */
- if (rte->relkind != RELKIND_FOREIGN_TABLE)
- {
- applyLockingClause(qry, rti, strength, noWait, pushedDown);
- rte->requiredPerms |= ACL_SELECT_FOR_UPDATE;
- }
+ applyLockingClause(qry, rti, strength, noWait, pushedDown);
+ rte->requiredPerms |= ACL_SELECT_FOR_UPDATE;
}
else if (rte->rtekind == RTE_SUBQUERY)
{
applyLockingClause(qry, rti, strength, noWait, pushedDown);
- /* FOR [KEY] UPDATE/SHARE of subquery is propagated to subquery's rels */
+ /* FOR UPDATE/SHARE of subquery is propagated to subquery's rels */
markQueryForLocking(rte->subquery, (Node *) rte->subquery->jointree,
strength, noWait, true);
}
List *tlist,
List *scan_clauses);
-typedef void (*ExplainForeignScan_function) (ForeignScanState *node,
- struct ExplainState *es);
-
typedef void (*BeginForeignScan_function) (ForeignScanState *node,
int eflags);
typedef void (*EndForeignScan_function) (ForeignScanState *node);
+typedef void (*AddForeignUpdateTargets_function) (Query *parsetree,
+ RangeTblEntry *target_rte,
+ Relation target_relation);
+
+typedef List *(*PlanForeignModify_function) (PlannerInfo *root,
+ ModifyTable *plan,
+ Index resultRelation,
+ int subplan_index);
+
+typedef void (*BeginForeignModify_function) (ModifyTableState *mtstate,
+ ResultRelInfo *rinfo,
+ List *fdw_private,
+ int subplan_index,
+ int eflags);
+
+typedef TupleTableSlot *(*ExecForeignInsert_function) (EState *estate,
+ ResultRelInfo *rinfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+
+typedef TupleTableSlot *(*ExecForeignUpdate_function) (EState *estate,
+ ResultRelInfo *rinfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+
+typedef TupleTableSlot *(*ExecForeignDelete_function) (EState *estate,
+ ResultRelInfo *rinfo,
+ TupleTableSlot *slot,
+ TupleTableSlot *planSlot);
+
+typedef void (*EndForeignModify_function) (EState *estate,
+ ResultRelInfo *rinfo);
+
+typedef void (*ExplainForeignScan_function) (ForeignScanState *node,
+ struct ExplainState *es);
+
+typedef void (*ExplainForeignModify_function) (ModifyTableState *mtstate,
+ ResultRelInfo *rinfo,
+ List *fdw_private,
+ int subplan_index,
+ struct ExplainState *es);
+
typedef int (*AcquireSampleRowsFunc) (Relation relation, int elevel,
HeapTuple *rows, int targrows,
double *totalrows,
{
NodeTag type;
- /*
- * These functions are required.
- */
+ /* Functions for scanning foreign tables */
GetForeignRelSize_function GetForeignRelSize;
GetForeignPaths_function GetForeignPaths;
GetForeignPlan_function GetForeignPlan;
- ExplainForeignScan_function ExplainForeignScan;
BeginForeignScan_function BeginForeignScan;
IterateForeignScan_function IterateForeignScan;
ReScanForeignScan_function ReScanForeignScan;
EndForeignScan_function EndForeignScan;
/*
- * These functions are optional. Set the pointer to NULL for any that are
- * not provided.
+ * Remaining functions are optional. Set the pointer to NULL for any that
+ * are not provided.
*/
+
+ /* Functions for updating foreign tables */
+ AddForeignUpdateTargets_function AddForeignUpdateTargets;
+ PlanForeignModify_function PlanForeignModify;
+ BeginForeignModify_function BeginForeignModify;
+ ExecForeignInsert_function ExecForeignInsert;
+ ExecForeignUpdate_function ExecForeignUpdate;
+ ExecForeignDelete_function ExecForeignDelete;
+ EndForeignModify_function EndForeignModify;
+
+ /* Support functions for EXPLAIN */
+ ExplainForeignScan_function ExplainForeignScan;
+ ExplainForeignModify_function ExplainForeignModify;
+
+ /* Support functions for ANALYZE */
AnalyzeForeignTable_function AnalyzeForeignTable;
} FdwRoutine;
* resultSlot: tuple slot used to hold cleaned tuple.
* junkAttNo: not used by junkfilter code. Can be used by caller
* to remember the attno of a specific junk attribute
- * (execMain.c stores the "ctid" attno here).
+ * (nodeModifyTable.c keeps the "ctid" or "wholerow"
+ * attno here).
* ----------------
*/
typedef struct JunkFilter
* TrigFunctions cached lookup info for trigger functions
* TrigWhenExprs array of trigger WHEN expr states
* TrigInstrument optional runtime measurements for triggers
+ * FdwRoutine FDW callback functions, if foreign table
+ * FdwState available to save private state of FDW
* ConstraintExprs array of constraint-checking expr states
* junkFilter for removing junk attributes from tuples
* projectReturning for computing a RETURNING list
FmgrInfo *ri_TrigFunctions;
List **ri_TrigWhenExprs;
Instrumentation *ri_TrigInstrument;
+ struct FdwRoutine *ri_FdwRoutine;
+ void *ri_FdwState;
List **ri_ConstraintExprs;
JunkFilter *ri_junkFilter;
ProjectionInfo *ri_projectReturning;
int resultRelIndex; /* index of first resultRel in plan's list */
List *plans; /* plan(s) producing source data */
List *returningLists; /* per-target-table RETURNING tlists */
+ List *fdwPrivLists; /* per-target-table FDW private data lists */
List *rowMarks; /* PlanRowMarks (non-locking only) */
int epqParam; /* ID of Param for EvalPlanQual re-eval */
} ModifyTable;
* RowMarkType -
* enums for types of row-marking operations
*
- * When doing UPDATE, DELETE, or SELECT FOR [KEY] UPDATE/SHARE, we have to uniquely
+ * The first four of these values represent different lock strengths that
+ * we can take on tuples according to SELECT FOR [KEY] UPDATE/SHARE requests.
+ * We only support these on regular tables. For foreign tables, any locking
+ * that might be done for these requests must happen during the initial row
+ * fetch; there is no mechanism for going back to lock a row later (and thus
+ * no need for EvalPlanQual machinery during updates of foreign tables).
+ * This means that the semantics will be a bit different than for a local
+ * table; in particular we are likely to lock more rows than would be locked
+ * locally, since remote rows will be locked even if they then fail
+ * locally-checked restriction or join quals. However, the alternative of
+ * doing a separate remote query to lock each selected row is extremely
+ * unappealing, so let's do it like this for now.
+ *
+ * When doing UPDATE, DELETE, or SELECT FOR UPDATE/SHARE, we have to uniquely
* identify all the source rows, not only those from the target relations, so
* that we can perform EvalPlanQual rechecking at need. For plain tables we
- * can just fetch the TID, the same as for a target relation. Otherwise (for
- * example for VALUES or FUNCTION scans) we have to copy the whole row value.
- * The latter is pretty inefficient but fortunately the case is not
- * performance-critical in practice.
+ * can just fetch the TID, much as for a target relation; this case is
+ * represented by ROW_MARK_REFERENCE. Otherwise (for example for VALUES or
+ * FUNCTION scans) we have to copy the whole row value. ROW_MARK_COPY is
+ * pretty inefficient, since most of the time we'll never need the data; but
+ * fortunately the case is not performance-critical in practice. Note that
+ * we use ROW_MARK_COPY for non-target foreign tables, even if the FDW has a
+ * concept of rowid and so could theoretically support some form of
+ * ROW_MARK_REFERENCE. Although copying the whole row value is inefficient,
+ * it's probably still faster than doing a second remote fetch, so it doesn't
+ * seem worth the extra complexity to permit ROW_MARK_REFERENCE.
*/
typedef enum RowMarkType
{
* PlanRowMark -
* plan-time representation of FOR [KEY] UPDATE/SHARE clauses
*
- * When doing UPDATE, DELETE, or SELECT FOR [KEY] UPDATE/SHARE, we create a separate
+ * When doing UPDATE, DELETE, or SELECT FOR UPDATE/SHARE, we create a separate
* PlanRowMark node for each non-target relation in the query. Relations that
- * are not specified as FOR [KEY] UPDATE/SHARE are marked ROW_MARK_REFERENCE (if
- * real tables) or ROW_MARK_COPY (if not).
+ * are not specified as FOR UPDATE/SHARE are marked ROW_MARK_REFERENCE (if
+ * regular tables) or ROW_MARK_COPY (if not).
*
* Initially all PlanRowMarks have rti == prti and isParent == false.
* When the planner discovers that a relation is the root of an inheritance
*
* The planner also adds resjunk output columns to the plan that carry
* information sufficient to identify the locked or fetched rows. For
- * tables (markType != ROW_MARK_COPY), these columns are named
+ * regular tables (markType != ROW_MARK_COPY), these columns are named
* tableoid%u OID of table
* ctid%u TID of row
* The tableoid column is only present for an inheritance hierarchy.
long numGroups, double outputRows);
extern Result *make_result(PlannerInfo *root, List *tlist,
Node *resconstantqual, Plan *subplan);
-extern ModifyTable *make_modifytable(CmdType operation, bool canSetTag,
+extern ModifyTable *make_modifytable(PlannerInfo *root,
+ CmdType operation, bool canSetTag,
List *resultRelations, List *subplans, List *returningLists,
List *rowMarks, int epqParam);
extern bool is_projection_capable_plan(Plan *plan);
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