diff options
Diffstat (limited to 'src/backend/optimizer/plan/planmain.c')
| -rw-r--r-- | src/backend/optimizer/plan/planmain.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/backend/optimizer/plan/planmain.c b/src/backend/optimizer/plan/planmain.c index 0e05c945380..5e0619a3d8d 100644 --- a/src/backend/optimizer/plan/planmain.c +++ b/src/backend/optimizer/plan/planmain.c @@ -14,7 +14,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planmain.c,v 1.55 2000/04/12 17:15:22 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planmain.c,v 1.55.2.1 2000/09/23 23:50:47 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -184,7 +184,7 @@ subplanner(Query *root, * base_rel_list as relation references are found (e.g., in the * qualification, the targetlist, etc.). Restrict and join clauses * are added to appropriate lists belonging to the mentioned - * relations, and we also build lists of equijoined keys for pathkey + * relations. We also build lists of equijoined keys for pathkey * construction. */ root->base_rel_list = NIL; @@ -193,9 +193,19 @@ subplanner(Query *root, make_var_only_tlist(root, flat_tlist); add_restrict_and_join_to_rels(root, qual); + + /* + * Make sure we have RelOptInfo nodes for all relations used. + */ add_missing_rels_to_query(root); /* + * Use the completed lists of equijoined keys to deduce any implied + * but unstated equalities (for example, A=B and B=C imply A=C). + */ + generate_implied_equalities(root); + + /* * We should now have all the pathkey equivalence sets built, so it's * now possible to convert the requested query_pathkeys to canonical * form. |