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postgresql/contrib/postgres_fdw
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Robert Haas 7e0d64c7a5 postgres_fdw: Push down partition-wise aggregation. 
Since commit 7012b132d0, postgres_fdw
has been able to push down the toplevel aggregation operation to the
remote server.  Commit e2f1eb0ee3 made
it possible to break down the toplevel aggregation into one
aggregate per partition.  This commit lets postgres_fdw push down
aggregation in that case just as it does at the top level.

In order to make this work, this commit adds an additional argument
to the GetForeignUpperPaths FDW API.  A matching argument is added
to the signature for create_upper_paths_hook.  Third-party code using
either of these will need to be updated.

Also adjust create_foreignscan_plan() so that it picks up the correct
set of relids in this case.

Jeevan Chalke, reviewed by Ashutosh Bapat and by me and with some
adjustments by me.  The larger patch series of which this patch is a
part was also reviewed and tested by Antonin Houska, Rajkumar
Raghuwanshi, David Rowley, Dilip Kumar, Konstantin Knizhnik, Pascal
Legrand, and Rafia Sabih.

Discussion: http://postgr.es/m/CAM2+6=V64_xhstVHie0Rz=KPEQnLJMZt_e314P0jaT_oJ9MR8A@mail.gmail.com
Discussion: http://postgr.es/m/CAM2+6=XPWujjmj5zUaBTGDoB38CemwcPmjkRy0qOcsQj_V+2sQ@mail.gmail.com
 		2018-04-02 10:51:50 -04:00
..
expected postgres_fdw: Push down partition-wise aggregation. 2018-04-02 10:51:50 -04:00
sql postgres_fdw: Push down partition-wise aggregation. 2018-04-02 10:51:50 -04:00
.gitignore Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
Makefile Allow postgres_fdw to ship extension funcs/operators for remote execution. 2015-11-03 18:42:18 -05:00
connection.c Improve style guideline compliance of assorted error-report messages. 2018-03-22 17:33:10 -04:00
deparse.c Fix format_type() to restore its old behavior. 2018-03-01 11:37:46 -05:00
option.c Improve style guideline compliance of assorted error-report messages. 2018-03-22 17:33:10 -04:00
postgres_fdw--1.0.sql Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
postgres_fdw.c postgres_fdw: Push down partition-wise aggregation. 2018-04-02 10:51:50 -04:00
postgres_fdw.control Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
postgres_fdw.h postgres_fdw: Push down UPDATE/DELETE joins to remote servers. 2018-02-07 15:34:30 -05:00
shippable.c Update copyright for 2018 2018-01-02 23:30:12 -05:00