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postgresql/src/backend
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Tom Lane fa86238f1e Speed up match_eclasses_to_foreign_key_col() when there are many ECs. 
Check ec_relids before bothering to iterate through the EC members.
On a perhaps extreme, but still real-world, query in which
match_eclasses_to_foreign_key_col() accounts for the bulk of the
planner's runtime, this saves nearly 40% of the runtime.  It's a bit
of a stopgap fix, but it's simple enough to be back-patched to 9.6
where this code came in; so let's do that.

David Rowley

Discussion: https://postgr.es/m/6970.1545327857@sss.pgh.pa.us
2019-02-20 20:53:17 -05:00
..
access Avoid some unnecessary block reads in WAL reader 2019-02-18 09:52:02 +09:00
bootstrap Remove argument isprimary from index_build() 2019-01-24 07:57:09 +09:00
catalog Make object address handling more robust 2019-02-20 11:26:08 -03:00
commands Fix CREATE VIEW to allow zero-column views. 2019-02-17 12:37:31 -05:00
executor Remove line duplicated during conflict resolution. 2019-02-18 11:07:30 -08:00
foreign Update copyright for 2019 2019-01-02 12:44:25 -05:00
jit Renaming for new subscripting mechanism 2019-02-01 12:50:32 -03:00
lib Make use of compiler builtins and/or assembly for CLZ, CTZ, POPCNT. 2019-02-15 23:22:33 -05:00
libpq Get rid of another unconstify through API changes 2019-02-14 20:44:47 +01:00
main Replace @postgresql.org with @lists.postgresql.org for mailinglists 2019-01-19 19:06:35 +01:00
nodes Allow user control of CTE materialization, and change the default behavior. 2019-02-16 16:11:12 -05:00
optimizer Speed up match_eclasses_to_foreign_key_col() when there are many ECs. 2019-02-20 20:53:17 -05:00
parser Allow user control of CTE materialization, and change the default behavior. 2019-02-16 16:11:12 -05:00
partitioning Refactor planner's header files. 2019-01-29 15:48:51 -05:00
po Translation updates 2018-06-25 12:37:18 +02:00
port Add shared_memory_type GUC. 2019-02-03 12:47:26 +01:00
postmaster Move max_wal_senders out of max_connections for connection slot handling 2019-02-12 10:07:56 +09:00
regex Update copyright for 2019 2019-01-02 12:44:25 -05:00
replication Mark correctly initial slot snapshots with MVCC type when built 2019-02-20 12:31:07 +09:00
rewrite Fix DEFAULT-handling in multi-row VALUES lists for updatable views. 2019-02-20 08:30:21 +00:00
snowball Update copyright for 2019 2019-01-02 12:44:25 -05:00
statistics Rename nodes/relation.h to nodes/pathnodes.h. 2019-01-29 16:49:25 -05:00
storage Fix race in dsm_unpin_segment() when handles are reused. 2019-02-18 09:58:29 +13:00
tcop More unconstify use 2019-02-13 11:50:16 +01:00
tsearch Update copyright for 2019 2019-01-02 12:44:25 -05:00
utils Mark correctly initial slot snapshots with MVCC type when built 2019-02-20 12:31:07 +09:00
.gitignore Add .gitignore entries for AIX-specific intermediate build artifacts. 2015-07-08 20:44:22 -04:00
common.mk Remove PARTIAL_LINKING build mode. 2018-03-30 17:33:04 -07:00
Makefile Ensure link commands list *.o files before LDFLAGS. 2019-01-02 13:57:54 -05:00
nls.mk Translation updates 2018-06-25 12:37:18 +02:00