From 61f621b506a7cd29eb1b042a8510b709791034d0 Mon Sep 17 00:00:00 2001
From: Teodor Sigaev <teodor@sigaev.ru>
Date: Wed, 31 Jan 2007 16:54:51 +0000
Subject: [PATCH] Revert gincostestimate changes.
---
src/backend/utils/adt/selfuncs.c | 116 +------------------------------
1 file changed, 1 insertion(+), 115 deletions(-)
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c
index e035557ff2c..7908ab15167 100644
--- a/src/backend/utils/adt/selfuncs.c
+++ b/src/backend/utils/adt/selfuncs.c
@@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.224 2007/01/31 15:09:45 teodor Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.225 2007/01/31 16:54:51 teodor Exp $
*
*-------------------------------------------------------------------------
*/
@@ -76,7 +76,6 @@
#include <ctype.h>
#include <math.h>
-#include "access/gin.h"
#include "catalog/pg_opfamily.h"
#include "catalog/pg_statistic.h"
#include "catalog/pg_type.h"
@@ -5287,119 +5286,6 @@ gincostestimate(PG_FUNCTION_ARGS)
Cost *indexTotalCost = (Cost *) PG_GETARG_POINTER(5);
Selectivity *indexSelectivity = (Selectivity *) PG_GETARG_POINTER(6);
double *indexCorrelation = (double *) PG_GETARG_POINTER(7);
- ListCell *l;
- int32 nfullscan = 0;
-
- /*
- * GIN doesn't support full index scan.
- * If quals require full index scan then we should
- * return cost big as possible to forbid full index scan.
- */
-
- foreach(l, indexQuals)
- {
- RestrictInfo *rinfo = (RestrictInfo *) lfirst(l);
- Expr *clause;
- Node *leftop,
- *rightop,
- *operand;
- Oid extractProcOid;
- Oid clause_op;
- int strategy_op;
- Oid lefttype,
- righttype;
- bool recheck;
- int32 nentries;
-
- /*
- * For each clause it's needed to check operand
- * for values to search in GIN. So, we should find
- * extractQuery method to get values from operand
- */
-
- Assert(IsA(rinfo, RestrictInfo));
- clause = rinfo->clause;
- Assert( IsA(clause, OpExpr) );
- leftop = get_leftop(clause);
- rightop = get_rightop(clause);
- clause_op = ((OpExpr *) clause)->opno;
-
- if (match_index_to_operand(leftop, 0 /* GiN has only one column */, index))
- {
- operand = rightop;
- }
- else if (match_index_to_operand(rightop, 0, index))
- {
- operand = leftop;
- clause_op = get_commutator(clause_op);
- }
-
- if ( IsA(operand, RelabelType) )
- operand = (Node *) ((RelabelType *) operand)->arg;
-
- /*
- * It's impossible to call extractQuery method for not yet
- * known operand (taken from table, for example). In this
- * case we can't do anything useful...
- */
- if ( !IsA(operand, Const) )
- continue;
-
- if (!op_in_opfamily(clause_op, index->opfamily[0]))
- continue;
-
- /*
- * lefttype is a type of index column, righttype is a
- * type of operand (query)
- */
- get_op_opfamily_properties( clause_op, index->opfamily[0],
- &strategy_op, &lefttype, &righttype, &recheck);
-
- /*
- * GIN (as GiST) always has lefttype == righttype in pg_amproc
- * and they are equal to type Oid on which index was created/designed
- */
- extractProcOid = get_opfamily_proc( index->opfamily[0],
- lefttype, lefttype,
- GIN_EXTRACTQUERY_PROC );
-
- if ( !OidIsValid(extractProcOid) )
- continue; /* should not be */
-
- OidFunctionCall3( extractProcOid,
- ((Const*)operand)->constvalue,
- PointerGetDatum(&nentries),
- UInt16GetDatum(strategy_op));
-
- if ( nentries == 0 )
- nfullscan++;
- else if ( nentries < 0 )
- {
- /*
- * GIN_EXTRACTQUERY_PROC guarantees that nothing will be found
- */
- *indexStartupCost = 0;
- *indexTotalCost = 0;
- *indexSelectivity = 0;
- *indexCorrelation = 0;
- PG_RETURN_VOID();
- }
- }
-
- if ( nfullscan == list_length(indexQuals) )
- {
- /*
- * All quals are void and require full scan. So
- * set max possible cost to prevent index scan.
- */
- *indexStartupCost = disable_cost;
- *indexTotalCost = disable_cost;
- *indexSelectivity = 1.0;
- *indexCorrelation = 0;
-
- PG_RETURN_VOID();
- }
-
genericcostestimate(root, index, indexQuals, outer_rel, 0.0,
indexStartupCost, indexTotalCost,
--
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