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Remove support for OR'd indexscans internal to a single IndexScan plan

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node, as this behavior is now better done as a bitmap OR indexscan.
This allows considerable simplification in nodeIndexscan.c itself as
well as several planner modules concerned with indexscan plan generation.
Also we can improve the sharing of code between regular and bitmap
indexscans, since they are now working with nigh-identical Plan nodes.
This commit is contained in:
Tom Lane
2005-04-25 01:30:14 +00:00
parent 186655e9a5
commit 5b05185262
21 changed files with 711 additions and 1924 deletions
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74
src/backend/optimizer/plan/setrefs.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/setrefs.c,v 1.108 2005/04/22 21:58:31 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/setrefs.c,v 1.109 2005/04/25 01:30:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -107,18 +107,18 @@ set_plan_references(Plan *plan, List *rtable)
fix_expr_references(plan, (Node *) plan->targetlist);
fix_expr_references(plan, (Node *) plan->qual);
fix_expr_references(plan,
(Node *) ((IndexScan *) plan)->indxqual);
(Node *) ((IndexScan *) plan)->indexqual);
fix_expr_references(plan,
(Node *) ((IndexScan *) plan)->indxqualorig);
(Node *) ((IndexScan *) plan)->indexqualorig);
break;
case T_BitmapIndexScan:
/* no need to fix targetlist and qual */
Assert(plan->targetlist == NIL);
Assert(plan->qual == NIL);
fix_expr_references(plan,
(Node *) ((BitmapIndexScan *) plan)->indxqual);
(Node *) ((BitmapIndexScan *) plan)->indexqual);
fix_expr_references(plan,
(Node *) ((BitmapIndexScan *) plan)->indxqualorig);
(Node *) ((BitmapIndexScan *) plan)->indexqualorig);
break;
case T_BitmapHeapScan:
fix_expr_references(plan, (Node *) plan->targetlist);
@ -422,31 +422,31 @@ set_inner_join_references(Plan *inner_plan,
* var nodes to refer to the outer side of the join.
*/
IndexScan *innerscan = (IndexScan *) inner_plan;
List *indxqualorig = innerscan->indxqualorig;
List *indexqualorig = innerscan->indexqualorig;
/* No work needed if indxqual refers only to its own rel... */
if (NumRelids((Node *) indxqualorig) > 1)
/* No work needed if indexqual refers only to its own rel... */
if (NumRelids((Node *) indexqualorig) > 1)
{
Index innerrel = innerscan->scan.scanrelid;
/* only refs to outer vars get changed in the inner qual */
innerscan->indxqualorig = join_references(indxqualorig,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
innerscan->indxqual = join_references(innerscan->indxqual,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
innerscan->indexqualorig = join_references(indexqualorig,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
innerscan->indexqual = join_references(innerscan->indexqual,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
/*
* We must fix the inner qpqual too, if it has join
* clauses (this could happen if special operators are
* involved: some indxquals may get rechecked as qpquals).
* involved: some indexquals may get rechecked as qpquals).
*/
if (NumRelids((Node *) inner_plan->qual) > 1)
inner_plan->qual = join_references(inner_plan->qual,
@ -463,26 +463,26 @@ set_inner_join_references(Plan *inner_plan,
* Same, but index is being used within a bitmap plan.
*/
BitmapIndexScan *innerscan = (BitmapIndexScan *) inner_plan;
List *indxqualorig = innerscan->indxqualorig;
List *indexqualorig = innerscan->indexqualorig;
/* No work needed if indxqual refers only to its own rel... */
if (NumRelids((Node *) indxqualorig) > 1)
/* No work needed if indexqual refers only to its own rel... */
if (NumRelids((Node *) indexqualorig) > 1)
{
Index innerrel = innerscan->scan.scanrelid;
/* only refs to outer vars get changed in the inner qual */
innerscan->indxqualorig = join_references(indxqualorig,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
innerscan->indxqual = join_references(innerscan->indxqual,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
innerscan->indexqualorig = join_references(indexqualorig,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
innerscan->indexqual = join_references(innerscan->indexqual,
rtable,
outer_tlist,
NIL,
innerrel,
tlists_have_non_vars);
/* no need to fix inner qpqual */
Assert(inner_plan->qual == NIL);
}
@ -512,7 +512,7 @@ set_inner_join_references(Plan *inner_plan,
/*
* We must fix the inner qpqual too, if it has join
* clauses (this could happen if special operators are
* involved: some indxquals may get rechecked as qpquals).
* involved: some indexquals may get rechecked as qpquals).
*/
if (NumRelids((Node *) inner_plan->qual) > 1)
inner_plan->qual = join_references(inner_plan->qual,