database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

When a cursor is opened using dblink_open, only start a transaction

Browse Source 
if there isn't one already open. Upon dblink_close, only commit
the open transaction if it was started by dblink_open, and only
then when all cursors opened by dblink_open are closed. The transaction
accounting is done individually for all named connections, plus
the persistent unnamed connection.
This commit is contained in:
Joe Conway
2005-10-18 02:55:49 +00:00
parent c62b29a603
commit 056eb1412c
3 changed files with 193 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

82
contrib/dblink/expected/dblink.out
View File

@ -436,6 +436,88 @@ SELECT dblink_exec('myconn','ABORT');
ROLLBACK
(1 row)
-- test opening cursor in a transaction
SELECT dblink_exec('myconn','BEGIN');
dblink_exec
-------------
BEGIN
(1 row)
-- an open transaction will prevent dblink_open() from opening its own
SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foo');
dblink_open
-------------
OK
(1 row)
-- this should not commit the transaction because the client opened it
SELECT dblink_close('myconn','rmt_foo_cursor');
dblink_close
--------------
OK
(1 row)
-- this should succeed because we have an open transaction
SELECT dblink_exec('myconn','DECLARE xact_test CURSOR FOR SELECT * FROM foo');
dblink_exec
----------------
DECLARE CURSOR
(1 row)
-- commit remote transaction
SELECT dblink_exec('myconn','COMMIT');
dblink_exec
-------------
COMMIT
(1 row)
-- test automatic transactions for multiple cursor opens
SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foo');
dblink_open
-------------
OK
(1 row)
-- the second cursor
SELECT dblink_open('myconn','rmt_foo_cursor2','SELECT * FROM foo');
dblink_open
-------------
OK
(1 row)
-- this should not commit the transaction
SELECT dblink_close('myconn','rmt_foo_cursor2');
dblink_close
--------------
OK
(1 row)
-- this should succeed because we have an open transaction
SELECT dblink_exec('myconn','DECLARE xact_test CURSOR FOR SELECT * FROM foo');
dblink_exec
----------------
DECLARE CURSOR
(1 row)
-- this should commit the transaction
SELECT dblink_close('myconn','rmt_foo_cursor');
dblink_close
--------------
OK
(1 row)
-- this should fail because there is no open transaction
SELECT dblink_exec('myconn','DECLARE xact_test CURSOR FOR SELECT * FROM foo');
ERROR: sql error
DETAIL: ERROR: cursor "xact_test" already exists
-- reset remote transaction state
SELECT dblink_exec('myconn','ABORT');
dblink_exec
-------------
ROLLBACK
(1 row)
-- open a cursor
SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foo');
dblink_open