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Diffstat (limited to 'src/backend/optimizer/path/costsize.c')
| -rw-r--r-- | src/backend/optimizer/path/costsize.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c index ee23ed7835d..52ebdd90fcb 100644 --- a/src/backend/optimizer/path/costsize.c +++ b/src/backend/optimizer/path/costsize.c @@ -4635,6 +4635,9 @@ cost_rescan(PlannerInfo *root, Path *path, * preferred since it allows caching of the results.) * The result includes both a one-time (startup) component, * and a per-evaluation component. + * + * Note: in some code paths root can be passed as NULL, resulting in + * slightly worse estimates. */ void cost_qual_eval(QualCost *cost, List *quals, PlannerInfo *root) |