diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2000-08-13 02:50:35 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2000-08-13 02:50:35 +0000 |
| commit | 37168b8da43d9a6f7471cf757119ece6c96fb2b9 (patch) | |
| tree | ce7059e77ac05a045f9de7c6272c7e1c8210d96a /src/backend/optimizer/plan/createplan.c | |
| parent | 766fb7f707f9527be219353f5f970aab3d786554 (diff) | |
Clean up handling of variable-free qual clauses. System now does the
right thing with variable-free clauses that contain noncachable functions,
such as 'WHERE random() < 0.5' --- these are evaluated once per
potential output tuple. Expressions that contain only Params are
now candidates to be indexscan quals --- for example, 'var = ($1 + 1)'
can now be indexed. Cope with RelabelType nodes atop potential indexscan
variables --- this oversight prevents 7.0.* from recognizing some
potentially indexscanable situations.
Diffstat (limited to 'src/backend/optimizer/plan/createplan.c')
| -rw-r--r-- | src/backend/optimizer/plan/createplan.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c index bf91b8d1a6c..c049f5d86b6 100644 --- a/src/backend/optimizer/plan/createplan.c +++ b/src/backend/optimizer/plan/createplan.c @@ -10,7 +10,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.94 2000/07/12 02:37:08 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.95 2000/08/13 02:50:06 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -866,6 +866,12 @@ fix_indxqual_operand(Node *node, int baserelid, Form_pg_index index, Oid *opclass) { /* + * Remove any binary-compatible relabeling of the indexkey + */ + if (IsA(node, RelabelType)) + node = ((RelabelType *) node)->arg; + + /* * We represent index keys by Var nodes having the varno of the base * table but varattno equal to the index's attribute number (index * column position). This is a bit hokey ... would be cleaner to use |