diff options
Diffstat (limited to 'src/backend/optimizer/path/allpaths.c')
| -rw-r--r-- | src/backend/optimizer/path/allpaths.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/backend/optimizer/path/allpaths.c b/src/backend/optimizer/path/allpaths.c index 0eeff804bcf..b399592ff81 100644 --- a/src/backend/optimizer/path/allpaths.c +++ b/src/backend/optimizer/path/allpaths.c @@ -912,7 +912,11 @@ set_foreign_size(PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte) /* ... but do not let it set the rows estimate to zero */ rel->rows = clamp_row_est(rel->rows); - /* also, make sure rel->tuples is not insane relative to rel->rows */ + /* + * Also, make sure rel->tuples is not insane relative to rel->rows. + * Notably, this ensures sanity if pg_class.reltuples contains -1 and the + * FDW doesn't do anything to replace that. + */ rel->tuples = Max(rel->tuples, rel->rows); } |