diff options
Diffstat (limited to 'src/backend/optimizer/util/plancat.c')
| -rw-r--r-- | src/backend/optimizer/util/plancat.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/backend/optimizer/util/plancat.c b/src/backend/optimizer/util/plancat.c index 662fcbaaf8e..605e7f64eed 100644 --- a/src/backend/optimizer/util/plancat.c +++ b/src/backend/optimizer/util/plancat.c @@ -9,7 +9,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.134 2007/04/21 21:01:45 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.135 2007/05/25 17:54:25 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -40,6 +40,9 @@ /* GUC parameter */ bool constraint_exclusion = false; +/* Hook for plugins to get control in get_relation_info() */ +get_relation_info_hook_type get_relation_info_hook = NULL; + static void estimate_rel_size(Relation rel, int32 *attr_widths, BlockNumber *pages, double *tuples); @@ -279,6 +282,14 @@ get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent, rel->indexlist = indexinfos; heap_close(relation, NoLock); + + /* + * Allow a plugin to editorialize on the info we obtained from the + * catalogs. Actions might include altering the assumed relation size, + * removing an index, or adding a hypothetical index to the indexlist. + */ + if (get_relation_info_hook) + (*get_relation_info_hook) (root, relationObjectId, inhparent, rel); } /* |