Fix Connection class _copy_in private method

Closes: MagicStack#555

Author: ABCDeath

asyncpg/connection.py

@@ -813,7 +813,7 @@ async def _copy_in(self, copy_stmt, source, timeout):
 
  if path is not None:
  # a path
- f = await run_in_executor(None, open, path, 'wb')
+ f = await run_in_executor(None, open, path, 'rb')
  opened_by_us = True
  elif hasattr(source, 'read'):
  # file-like

tests/test_copy.py

@@ -8,6 +8,7 @@
 import asyncio
 import datetime
 import io
+import os
 import tempfile
 
 import asyncpg
@@ -582,6 +583,48 @@ async def __anext__(self):
  finally:
  await self.con.execute('DROP TABLE copytab')
 
+ async def test_copy_to_table_from_file_path(self):
+ await self.con.execute('''
+ CREATE TABLE copytab(a text, "b~" text, i int);
+ ''')
+
+ f = tempfile.NamedTemporaryFile(delete=False)
+ try:
+ f.write(
+ '\n'.join([
+ 'a1\tb1\t1',
+ 'a2\tb2\t2',
+ 'a3\tb3\t3',
+ 'a4\tb4\t4',
+ 'a5\tb5\t5',
+ '*\t\\N\t\\N',
+ ''
+ ]).encode('utf-8')
+ )
+ f.close()
+
+ res = await self.con.copy_to_table('copytab', source=f.name)
+ self.assertEqual(res, 'COPY 6')
+
+ output = await self.con.fetch("""
+ SELECT * FROM copytab ORDER BY a
+ """)
+ self.assertEqual(
+ output,
+ [
+ ('*', None, None),
+ ('a1', 'b1', 1),
+ ('a2', 'b2', 2),
+ ('a3', 'b3', 3),
+ ('a4', 'b4', 4),
+ ('a5', 'b5', 5),
+ ]
+ )
+
+ finally:
+ await self.con.execute('DROP TABLE public.copytab')
+ os.unlink(f.name)
+
  async def test_copy_records_to_table_1(self):
  await self.con.execute('''
  CREATE TABLE copytab(a text, b int, c timestamptz);