feat: update DatabaseMetaData to include named schemas (#1733)

Author: olavloite

src/main/java/com/google/cloud/spanner/jdbc/JdbcDatabaseMetaData.java

@@ -419,27 +419,27 @@ public String getCatalogSeparator() {
 
  @Override
  public boolean supportsSchemasInDataManipulation() {
- return false;
+ return true;
  }
 
  @Override
  public boolean supportsSchemasInProcedureCalls() {
- return false;
+ return true;
  }
 
  @Override
  public boolean supportsSchemasInTableDefinitions() {
- return false;
+ return true;
  }
 
  @Override
  public boolean supportsSchemasInIndexDefinitions() {
- return false;
+ return true;
  }
 
  @Override
  public boolean supportsSchemasInPrivilegeDefinitions() {
- return false;
+ return true;
  }
 
  @Override
@@ -602,7 +602,7 @@ public int getMaxIndexLength() {
 
  @Override
  public int getMaxSchemaNameLength() {
- return 0;
+ return 128;
  }
 
  @Override

src/test/java/com/google/cloud/spanner/jdbc/JdbcDatabaseMetaDataTest.java

@@ -112,7 +112,7 @@ public void testTrivialMethods() throws SQLException {
  assertEquals(8000, meta.getMaxIndexLength());
  assertEquals(0, meta.getMaxProcedureNameLength());
  assertEquals(0, meta.getMaxRowSize());
- assertEquals(0, meta.getMaxSchemaNameLength());
+ assertEquals(128, meta.getMaxSchemaNameLength());
  assertEquals(1000000, meta.getMaxStatementLength());
  assertEquals(0, meta.getMaxStatements());
  assertEquals(128, meta.getMaxTableNameLength());
@@ -245,11 +245,11 @@ public void testTrivialMethods() throws SQLException {
  assertTrue(meta.supportsResultSetHoldability(ResultSet.CLOSE_CURSORS_AT_COMMIT));
  assertFalse(meta.supportsResultSetHoldability(ResultSet.HOLD_CURSORS_OVER_COMMIT));
  assertFalse(meta.supportsSavepoints());
- assertFalse(meta.supportsSchemasInDataManipulation());
- assertFalse(meta.supportsSchemasInIndexDefinitions());
- assertFalse(meta.supportsSchemasInPrivilegeDefinitions());
- assertFalse(meta.supportsSchemasInProcedureCalls());
- assertFalse(meta.supportsSchemasInTableDefinitions());
+ assertTrue(meta.supportsSchemasInDataManipulation());
+ assertTrue(meta.supportsSchemasInIndexDefinitions());
+ assertTrue(meta.supportsSchemasInPrivilegeDefinitions());
+ assertTrue(meta.supportsSchemasInProcedureCalls());
+ assertTrue(meta.supportsSchemasInTableDefinitions());
  assertFalse(meta.supportsSelectForUpdate());
  assertFalse(meta.supportsStatementPooling());
  assertFalse(meta.supportsStoredFunctionsUsingCallSyntax());