Tom Lane e9f2703ab7 Fix postgres_fdw to cope with duplicate GROUP BY entries. ... Commit 7012b132d, which added the ability to push down aggregates and grouping to the remote server, wasn't careful to ensure that the remote server would have the same idea we do about which columns are the grouping columns, in cases where there are textually identical GROUP BY expressions. Such cases typically led to "targetlist item has multiple sortgroupref labels" errors. To fix this reliably, switch over to using "GROUP BY column-number" syntax rather than "GROUP BY expression" in transmitted queries, and adjust foreign_grouping_ok() to be more careful about duplicating the sortgroupref labeling of the local pathtarget. Per bug #14890 from Sean Johnston. Back-patch to v10 where the buggy code was introduced. Jeevan Chalke, reviewed by Ashutosh Bapat Discussion: https://postgr.es/m/20171107134948.1508.94783@wrigleys.postgresql.org		2018-01-12 16:52:49 -05:00
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expected	Fix postgres_fdw to cope with duplicate GROUP BY entries.	2018-01-12 16:52:49 -05:00
sql	Fix postgres_fdw to cope with duplicate GROUP BY entries.	2018-01-12 16:52:49 -05:00
.gitignore	Add postgres_fdw contrib module.	2013-02-21 05:27:16 -05:00
connection.c	Update copyright for 2018	2018-01-02 23:30:12 -05:00
deparse.c	Fix postgres_fdw to cope with duplicate GROUP BY entries.	2018-01-12 16:52:49 -05:00
Makefile	Allow postgres_fdw to ship extension funcs/operators for remote execution.	2015-11-03 18:42:18 -05:00
option.c	Update copyright for 2018	2018-01-02 23:30:12 -05:00
postgres_fdw--1.0.sql	Add postgres_fdw contrib module.	2013-02-21 05:27:16 -05:00
postgres_fdw.c	Fix postgres_fdw to cope with duplicate GROUP BY entries.	2018-01-12 16:52:49 -05:00
postgres_fdw.control	Add postgres_fdw contrib module.	2013-02-21 05:27:16 -05:00
postgres_fdw.h	Update copyright for 2018	2018-01-02 23:30:12 -05:00
shippable.c	Update copyright for 2018	2018-01-02 23:30:12 -05:00