diff options
| -rw-r--r-- | src/backend/optimizer/path/costsize.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c index 24af7afe799..bb506678ce4 100644 --- a/src/backend/optimizer/path/costsize.c +++ b/src/backend/optimizer/path/costsize.c @@ -49,7 +49,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/path/costsize.c,v 1.147 2005/08/27 22:37:00 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/path/costsize.c,v 1.148 2005/10/05 17:19:19 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1898,17 +1898,23 @@ join_in_selectivity(JoinPath *path, PlannerInfo *root) void set_function_size_estimates(PlannerInfo *root, RelOptInfo *rel) { + RangeTblEntry *rte; + /* Should only be applied to base relations that are functions */ Assert(rel->relid > 0); - Assert(rel->rtekind == RTE_FUNCTION); + rte = rt_fetch(rel->relid, root->parse->rtable); + Assert(rte->rtekind == RTE_FUNCTION); /* * Estimate number of rows the function itself will return. * - * XXX no idea how to do this yet; but should at least check whether + * XXX no idea how to do this yet; but we can at least check whether * function returns set or not... */ - rel->tuples = 1000; + if (expression_returns_set(rte->funcexpr)) + rel->tuples = 1000; + else + rel->tuples = 1; /* Now estimate number of output rows, etc */ set_baserel_size_estimates(root, rel); |