diff options
Diffstat (limited to 'src/backend/optimizer/path/indxpath.c')
| -rw-r--r-- | src/backend/optimizer/path/indxpath.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c index 7090a7e0c0d..9ab146a1f74 100644 --- a/src/backend/optimizer/path/indxpath.c +++ b/src/backend/optimizer/path/indxpath.c @@ -199,14 +199,15 @@ create_index_paths(PlannerInfo *root, RelOptInfo *rel) true, NULL, SAOP_FORBID, ST_ANYSCAN); /* - * Submit all the ones that can form plain IndexScan plans to add_path. (A - * plain IndexPath always represents a plain IndexScan plan; however some - * of the indexes might support only bitmap scans, and those we mustn't - * submit to add_path here.) Also, pick out the ones that might be useful - * as bitmap scans. For that, we must discard indexes that don't support - * bitmap scans, and we also are only interested in paths that have some - * selectivity; we should discard anything that was generated solely for - * ordering purposes. + * Submit all the ones that can form plain IndexScan plans to add_path. + * (A plain IndexPath might represent either a plain IndexScan or an + * IndexOnlyScan, but for our purposes here the distinction does not + * matter. However, some of the indexes might support only bitmap scans, + * and those we mustn't submit to add_path here.) Also, pick out the ones + * that might be useful as bitmap scans. For that, we must discard + * indexes that don't support bitmap scans, and we also are only + * interested in paths that have some selectivity; we should discard + * anything that was generated solely for ordering purposes. */ bitindexpaths = NIL; foreach(l, indexpaths) @@ -1107,11 +1108,9 @@ check_index_only(RelOptInfo *rel, IndexOptInfo *index) /* * For the moment, we just ignore index expressions. It might be nice - * to do something with them, later. We also ignore index columns - * that are system columns (such as OID), because the virtual-tuple - * coding used by IndexStoreHeapTuple() can't deal with them. + * to do something with them, later. */ - if (attno <= 0) + if (attno == 0) continue; index_attrs = |