diff options
Diffstat (limited to 'src/backend/optimizer/path/joinpath.c')
| -rw-r--r-- | src/backend/optimizer/path/joinpath.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/src/backend/optimizer/path/joinpath.c b/src/backend/optimizer/path/joinpath.c index 57688deeb85..4a7018aa64a 100644 --- a/src/backend/optimizer/path/joinpath.c +++ b/src/backend/optimizer/path/joinpath.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinpath.c,v 1.43 1999/08/06 04:00:15 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinpath.c,v 1.44 1999/08/09 03:16:43 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -23,7 +23,7 @@ #include "optimizer/pathnode.h" #include "optimizer/paths.h" #include "parser/parsetree.h" -#include "utils/syscache.h" +#include "utils/lsyscache.h" static Path *best_innerjoin(List *join_paths, List *outer_relid); static List *sort_inner_and_outer(RelOptInfo *joinrel, RelOptInfo *outerrel, RelOptInfo *innerrel, @@ -586,7 +586,6 @@ hash_inner_and_outer(Query *root, /* * Estimate disbursion of the specified Var - * Generate some kind of estimate, no matter what... * * We use a default of 0.1 if we can't figure out anything better. * This will typically discourage use of a hash rather strongly, @@ -598,24 +597,11 @@ static Cost estimate_disbursion(Query *root, Var *var) { Oid relid; - HeapTuple atp; - double disbursion; if (! IsA(var, Var)) return 0.1; relid = getrelid(var->varno, root->rtable); - atp = SearchSysCacheTuple(ATTNUM, - ObjectIdGetDatum(relid), - Int16GetDatum(var->varattno), - 0, 0); - if (! HeapTupleIsValid(atp)) - return 0.1; - - disbursion = ((Form_pg_attribute) GETSTRUCT(atp))->attdisbursion; - if (disbursion > 0.0) - return disbursion; - - return 0.1; + return (Cost) get_attdisbursion(relid, var->varattno, 0.1); } |