diff options
Diffstat (limited to 'src/backend/optimizer/path/clausesel.c')
| -rw-r--r-- | src/backend/optimizer/path/clausesel.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/backend/optimizer/path/clausesel.c b/src/backend/optimizer/path/clausesel.c index b8bbc29c50..4b48ae1e26 100644 --- a/src/backend/optimizer/path/clausesel.c +++ b/src/backend/optimizer/path/clausesel.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/path/clausesel.c,v 1.85 2007/04/21 21:01:44 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/path/clausesel.c,v 1.86 2007/06/11 01:16:22 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -18,6 +18,7 @@ #include "nodes/makefuncs.h" #include "optimizer/clauses.h" #include "optimizer/cost.h" +#include "optimizer/pathnode.h" #include "optimizer/plancat.h" #include "parser/parsetree.h" #include "utils/fmgroids.h" @@ -712,6 +713,15 @@ clause_selectivity(PlannerInfo *root, varRelid, jointype); } + else if (IsA(clause, CurrentOfExpr)) + { + /* CURRENT OF selects at most one row of its table */ + CurrentOfExpr *cexpr = (CurrentOfExpr *) clause; + RelOptInfo *crel = find_base_rel(root, cexpr->cvarno); + + if (crel->tuples > 0) + s1 = 1.0 / crel->tuples; + } else if (IsA(clause, RelabelType)) { /* Not sure this case is needed, but it can't hurt */ |