Hi,
I'm seeing an issue after upgrading from 12.13 to 15.4. This happens
when we run a query against a foreign table (fdw on the same instance to
a different database) -- but does not appear when we get rid of
postgres_fdw:
ERROR: cursor can only scan forward
HINT: Declare it with SCROLL option to enable backward scan.
CONTEXT: remote SQL command: MOVE BACKWARD ALL IN c1
SQL state: 55000
I attached the query. The name of the foreign table is
"foobar.sys_user".
Looks like the bug #17889, and this is the last email in that thread:
https://www.postgresql.org/message-id/1852635.1682808624%40sss.pgh.pa.us
OTOH, same query works (against the FDW) when we remove the following
WHERE clause:
WHERE
tbl.table_status = 'A'
AND tbl.table_id <> 1
AND tbl.table_id <> - 2
Any hints?
Regards,
--
Devrim Gündüz
Open Source Solution Architect, PostgreSQL Major Contributor
Twitter: @DevrimGunduz , @DevrimGunduzTR
SELECT
*
FROM
foobar.sys_data_table_info AS tbl
INNER JOIN foobar.sys_folder_items fi ON tbl.table_id = fi.item_id
AND fi.item_type = 'TABLE'
LEFT JOIN foobar.sys_user_foreign uc ON tbl.created_by = uc.user_id
LEFT JOIN foobar.sys_user_foreign uu ON tbl.updated_by = uu.user_id
WHERE
tbl.table_status = 'A'
AND tbl.table_id <> 1
AND tbl.table_id <> - 2
ORDER BY
updated_at DESC NULLS LAST
