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Create executor and planner-backend support for decoupled heap and index

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scans, using in-memory tuple ID bitmaps as the intermediary.  The planner
frontend (path creation and cost estimation) is not there yet, so none
of this code can be executed.  I have tested it using some hacked planner
code that is far too ugly to see the light of day, however.  Committing
now so that the bulk of the infrastructure changes go in before the tree
drifts under me.
This commit is contained in:
Tom Lane
2005-04-19 22:35:18 +00:00
parent 04ce41ca62
commit 4a8c5d0375
30 changed files with 2783 additions and 76 deletions
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4
src/include/optimizer/cost.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.63 2005/03/27 06:29:49 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/cost.h,v 1.64 2005/04/19 22:35:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -53,6 +53,8 @@ extern double clamp_row_est(double nrows);
extern void cost_seqscan(Path *path, Query *root, RelOptInfo *baserel);
extern void cost_index(Path *path, Query *root, IndexOptInfo *index,
List *indexQuals, bool is_injoin);
extern void cost_bitmap_scan(Path *path, Query *root, RelOptInfo *baserel,
Node *bitmapqual, bool is_injoin);
extern void cost_tidscan(Path *path, Query *root,
RelOptInfo *baserel, List *tideval);
extern void cost_subqueryscan(Path *path, RelOptInfo *baserel);

5
src/include/optimizer/pathnode.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/pathnode.h,v 1.57 2005/03/27 06:29:49 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/pathnode.h,v 1.58 2005/04/19 22:35:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -33,6 +33,9 @@ extern IndexPath *create_index_path(Query *root,
List *restriction_clauses,
List *pathkeys,
ScanDirection indexscandir);
extern BitmapHeapPath *create_bitmap_heap_path(Query *root,
RelOptInfo *rel,
Node *bitmapqual);
extern TidPath *create_tidscan_path(Query *root, RelOptInfo *rel,
List *tideval);
extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);