diff options
Diffstat (limited to 'src')
| -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 efc49dad1ec..39c426a62fb 100644 --- a/src/backend/optimizer/path/costsize.c +++ b/src/backend/optimizer/path/costsize.c @@ -1925,6 +1925,9 @@ cost_mergejoin(MergePath *path, PlannerInfo *root, SpecialJoinInfo *sjinfo) outerendsel = outer_rows / outer_path_rows; innerendsel = inner_rows / inner_path_rows; + Assert(outerstartsel <= outerendsel); + Assert(innerstartsel <= innerendsel); + /* cost of source data */ if (outersortkeys) /* do we need to sort outer? */ |