diff options
Diffstat (limited to 'src/backend/optimizer/path/allpaths.c')
| -rw-r--r-- | src/backend/optimizer/path/allpaths.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/src/backend/optimizer/path/allpaths.c b/src/backend/optimizer/path/allpaths.c index 9368723188f..1e9074186c2 100644 --- a/src/backend/optimizer/path/allpaths.c +++ b/src/backend/optimizer/path/allpaths.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.83 2001/12/10 22:54:12 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.84 2002/05/12 20:10:03 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -42,6 +42,8 @@ static void set_inherited_rel_pathlist(Query *root, RelOptInfo *rel, List *inheritlist); static void set_subquery_pathlist(Query *root, RelOptInfo *rel, Index rti, RangeTblEntry *rte); +static void set_function_pathlist(Query *root, RelOptInfo *rel, + RangeTblEntry *rte); static RelOptInfo *make_one_rel_by_joins(Query *root, int levels_needed, List *initial_rels); @@ -98,11 +100,16 @@ set_base_rel_pathlists(Query *root) rti = lfirsti(rel->relids); rte = rt_fetch(rti, root->rtable); - if (rel->issubquery) + if (rel->rtekind == RTE_SUBQUERY) { /* Subquery --- generate a separate plan for it */ set_subquery_pathlist(root, rel, rti, rte); } + else if (rel->rtekind == RTE_FUNCTION) + { + /* RangeFunction --- generate a separate plan for it */ + set_function_pathlist(root, rel, rte); + } else if ((inheritlist = expand_inherted_rtentry(root, rti, true)) != NIL) { @@ -386,6 +393,23 @@ set_subquery_pathlist(Query *root, RelOptInfo *rel, } /* + * set_function_pathlist + * Build the (single) access path for a function RTE + */ +static void +set_function_pathlist(Query *root, RelOptInfo *rel, RangeTblEntry *rte) +{ + /* Mark rel with estimated output rows, width, etc */ + set_function_size_estimates(root, rel); + + /* Generate appropriate path */ + add_path(rel, create_functionscan_path(root, rel)); + + /* Select cheapest path (pretty easy in this case...) */ + set_cheapest(rel); +} + +/* * make_fromexpr_rel * Build access paths for a FromExpr jointree node. */ |