database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

Collect and use multi-column dependency stats

Browse Source 
Follow on patch in the multi-variate statistics patch series.

CREATE STATISTICS s1 WITH (dependencies) ON (a, b) FROM t;
ANALYZE;
will collect dependency stats on (a, b) and then use the measured
dependency in subsequent query planning.

Commit 7b504eb282 added
CREATE STATISTICS with n-distinct coefficients. These are now
specified using the mutually exclusive option WITH (ndistinct).

Author: Tomas Vondra, David Rowley
Reviewed-by: Kyotaro HORIGUCHI, Álvaro Herrera, Dean Rasheed, Robert Haas
and many other comments and contributions
Discussion: https://postgr.es/m/56f40b20-c464-fad2-ff39-06b668fac47c@2ndquadrant.com
This commit is contained in:
Simon Riggs
2017-04-05 18:00:42 -04:00
parent 00b6b6feb1
commit 2686ee1b7c
31 changed files with 2035 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
contrib/postgres_fdw/postgres_fdw.c
View File

@ -591,6 +591,7 @@ postgresGetForeignRelSize(PlannerInfo *root,
fpinfo->local_conds,
baserel->relid,
JOIN_INNER,
NULL,
NULL);
cost_qual_eval(&fpinfo->local_conds_cost, fpinfo->local_conds, root);
@ -2572,6 +2573,7 @@ estimate_path_cost_size(PlannerInfo *root,
local_param_join_conds,
foreignrel->relid,
JOIN_INNER,
NULL,
NULL);
local_sel *= fpinfo->local_conds_sel;
@ -4455,6 +4457,7 @@ postgresGetForeignJoinPaths(PlannerInfo *root,
fpinfo->local_conds,
0,
JOIN_INNER,
NULL,
NULL);
cost_qual_eval(&fpinfo->local_conds_cost, fpinfo->local_conds, root);
@ -4465,7 +4468,7 @@ postgresGetForeignJoinPaths(PlannerInfo *root,
if (!fpinfo->use_remote_estimate)
fpinfo->joinclause_sel = clauselist_selectivity(root, fpinfo->joinclauses,
0, fpinfo->jointype,
extra->sjinfo);
extra->sjinfo, NULL);
/* Estimate costs for bare join relation */
estimate_path_cost_size(root, joinrel, NIL, NIL, &rows,