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| author | Simon Riggs <simon@2ndQuadrant.com> | 2017-04-05 18:00:42 -0400 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2017-04-05 18:00:42 -0400 |
| commit | 2686ee1b7ccfb9214064d4d2a98ea77382880306 (patch) | |
| tree | 32095d935e240b93ed30b1e86c2efa161cffa4dd /contrib/postgres_fdw/postgres_fdw.c | |
| parent | 00b6b6feb12cef53737287b67ecef6aff1f1d8ab (diff) | |
| download | postgresql-2686ee1b7ccfb9214064d4d2a98ea77382880306.tar.gz postgresql-2686ee1b7ccfb9214064d4d2a98ea77382880306.zip | |
Collect and use multi-column dependency stats
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 7b504eb282ca2f5104b5c00b4f05a3ef6bb1385b 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
Diffstat (limited to 'contrib/postgres_fdw/postgres_fdw.c')
| -rw-r--r-- | contrib/postgres_fdw/postgres_fdw.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/contrib/postgres_fdw/postgres_fdw.c b/contrib/postgres_fdw/postgres_fdw.c index 2851869932d..a73d1a0bed9 100644 --- a/contrib/postgres_fdw/postgres_fdw.c +++ b/contrib/postgres_fdw/postgres_fdw.c @@ -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, |