postgres_fdw: Fix error message for PREPARE TRANSACTION.
authorEtsuro Fujita <[email protected]>
Fri, 8 Nov 2019 08:00:38 +0000 (17:00 +0900)
committerEtsuro Fujita <[email protected]>
Fri, 8 Nov 2019 08:00:38 +0000 (17:00 +0900)
commit1bd67d5358435e4441961d250a408979f0c4f484
treef5658d396bcebecfaa629d4d91dd19d598f6fc3f
parent87477b67713300a89b3088812142ccae239c1d75
postgres_fdw: Fix error message for PREPARE TRANSACTION.

Currently, postgres_fdw does not support preparing a remote transaction
for two-phase commit even in the case where the remote transaction is
read-only, but the old error message appeared to imply that that was not
supported only if the remote transaction modified remote tables.  Change
the message so as to include the case where the remote transaction is
read-only.

Also fix a comment above the message.

Also add a note about the lack of supporting PREPARE TRANSACTION to the
postgres_fdw documentation.

Reported-by: Gilles Darold
Author: Gilles Darold and Etsuro Fujita
Reviewed-by: Michael Paquier and Kyotaro Horiguchi
Backpatch-through: 9.4
Discussion: https://postgr.es/m/08600ed3-3084-be70-65ba-279ab19618a5%40darold.net
contrib/postgres_fdw/connection.c
doc/src/sgml/postgres-fdw.sgml