postgresql/src/include/optimizer/plancat.h

/*-------------------------------------------------------------------------
 *
 * plancat.h
 *	  prototypes for plancat.c.
 *
 *
 * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $Id: plancat.h,v 1.22 2001/03/22 04:00:55 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef PLANCAT_H
#define PLANCAT_H

#include "nodes/relation.h"


extern void relation_info(Oid relationObjectId,
			  bool *hasindex, long *pages, double *tuples);

extern List *find_secondary_indexes(Oid relationObjectId);

extern List *find_inheritance_children(Oid inhparent);

extern bool has_subclass(Oid relationId);

extern Selectivity restriction_selectivity(Oid functionObjectId,
						Oid operatorObjectId,
						Oid relationObjectId,
						AttrNumber attributeNumber,
						Datum constValue,
						int constFlag);

extern Selectivity join_selectivity(Oid functionObjectId, Oid operatorObjectId,
				 Oid relationObjectId1, AttrNumber attributeNumber1,
				 Oid relationObjectId2, AttrNumber attributeNumber2);

#endif	 /* PLANCAT_H */
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`/*-------------------------------------------------------------------------`
			`*`
Change my-function-name-- to my_function_name, and optimizer renames. 1999-02-14 00:22:53 +01:00			`* plancat.h`
Massive commit to run PGINDENT on all .c and .h files. 1997-09-07 07:04:48 +02:00			`* prototypes for plancat.c.`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`*`
			`*`
Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group. 2001-01-24 20:43:33 +01:00			`* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group`
Add: * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files. 2000-01-26 06:58:53 +01:00			`* Portions Copyright (c) 1994, Regents of the University of California`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`*`
pgindent run. Make it all clean. 2001-03-22 05:01:46 +01:00			`* $Id: plancat.h,v 1.22 2001/03/22 04:00:55 momjian Exp $`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00			`*`
			`*-------------------------------------------------------------------------`
			`*/`
			`#ifndef PLANCAT_H`
			`#define PLANCAT_H`

Another round of planner/optimizer work. This is just restructuring and code cleanup; no major improvements yet. However, EXPLAIN does produce more intuitive outputs for nested loops with indexscans now... 2000-01-09 01:26:47 +01:00			`#include "nodes/relation.h"`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00
Combine index_info and find_secondary_indexes into a single routine that returns a list of RelOptInfos, eliminating the need for static state in index_info. That static state was a direct cause of coredumps; if anything decided to elog(ERROR) partway through an index_info search of pg_index, the next query would try to close a scan pointer that was pointing at no-longer-valid memory. Another example of the reasons to avoid static state variables... 1999-11-22 00:25:47 +01:00
Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED! 2000-09-29 20:21:41 +02:00			`extern void relation_info(Oid relationObjectId,`
pgindent run. Make it all clean. 2001-03-22 05:01:46 +01:00			`bool hasindex, long pages, double *tuples);`
Combine index_info and find_secondary_indexes into a single routine that returns a list of RelOptInfos, eliminating the need for static state in index_info. That static state was a direct cause of coredumps; if anything decided to elog(ERROR) partway through an index_info search of pg_index, the next query would try to close a scan pointer that was pointing at no-longer-valid memory. Another example of the reasons to avoid static state variables... 1999-11-22 00:25:47 +01:00
Subselects in FROM clause, per ISO syntax: FROM (SELECT ...) [AS] alias. (Don't forget that an alias is required.) Views reimplemented as expanding to subselect-in-FROM. Grouping, aggregates, DISTINCT in views actually work now (he says optimistically). No UNION support in subselects/views yet, but I have some ideas about that. Rule-related permissions checking moved out of rewriter and into executor. INITDB REQUIRED! 2000-09-29 20:21:41 +02:00			`extern List *find_secondary_indexes(Oid relationObjectId);`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00
Another round of planner/optimizer work. This is just restructuring and code cleanup; no major improvements yet. However, EXPLAIN does produce more intuitive outputs for nested loops with indexscans now... 2000-01-09 01:26:47 +01:00			`extern List *find_inheritance_children(Oid inhparent);`

Cause inheritance patch to meet minimum coding standards (no gcc warnings). 2000-06-09 05:17:13 +02:00			`extern bool has_subclass(Oid relationId);`

Another round of planner/optimizer work. This is just restructuring and code cleanup; no major improvements yet. However, EXPLAIN does produce more intuitive outputs for nested loops with indexscans now... 2000-01-09 01:26:47 +01:00			`extern Selectivity restriction_selectivity(Oid functionObjectId,`
Massive commit to run PGINDENT on all .c and .h files. 1997-09-07 07:04:48 +02:00			`Oid operatorObjectId,`
			`Oid relationObjectId,`
			`AttrNumber attributeNumber,`
Further work on planning of indexscans. Cleaned up interfaces to index_selectivity so that it can be handed an indexqual clause list rather than a bunch of assorted derivative data. 1999-07-26 01:07:26 +02:00			`Datum constValue,`
			`int constFlag);`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00
Another round of planner/optimizer work. This is just restructuring and code cleanup; no major improvements yet. However, EXPLAIN does produce more intuitive outputs for nested loops with indexscans now... 2000-01-09 01:26:47 +01:00			`extern Selectivity join_selectivity(Oid functionObjectId, Oid operatorObjectId,`
Massive commit to run PGINDENT on all .c and .h files. 1997-09-07 07:04:48 +02:00			`Oid relationObjectId1, AttrNumber attributeNumber1,`
			`Oid relationObjectId2, AttrNumber attributeNumber2);`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 08:22:35 +02:00
OK, folks, here is the pgindent output. 1998-09-01 06:40:42 +02:00			`#endif /* PLANCAT_H */`