postgresql/src/include/executor/nodeHash.h

/*-------------------------------------------------------------------------
 *
 * nodeHash.h
 *
 *
 *
 * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $Id: nodeHash.h,v 1.21 2001/10/25 05:49:59 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef NODEHASH_H
#define NODEHASH_H

#include "nodes/plannodes.h"

extern TupleTableSlot *ExecHash(Hash *node);
extern bool ExecInitHash(Hash *node, EState *estate, Plan *parent);
extern int	ExecCountSlotsHash(Hash *node);
extern void ExecEndHash(Hash *node);
extern HashJoinTable ExecHashTableCreate(Hash *node);
extern void ExecHashTableDestroy(HashJoinTable hashtable);
extern void ExecHashTableInsert(HashJoinTable hashtable,
					ExprContext *econtext,
					Node *hashkey);
extern int ExecHashGetBucket(HashJoinTable hashtable,
				  ExprContext *econtext,
				  Node *hashkey);
extern HeapTuple ExecScanHashBucket(HashJoinState *hjstate, List *hjclauses,
				   ExprContext *econtext);
extern void ExecHashTableReset(HashJoinTable hashtable, long ntuples);
extern void ExecReScanHash(Hash *node, ExprContext *exprCtxt, Plan *parent);
extern void ExecChooseHashTableSize(double ntuples, int tupwidth,
						int *virtualbuckets,
						int *physicalbuckets,
						int *numbatches);
#endif	 /* NODEHASH_H */
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 02:22:35 -04:00			`/*-------------------------------------------------------------------------`
			`*`
Change my-function-name-- to my_function_name, and optimizer renames. 1999-02-13 18:22:53 -05:00			`* nodeHash.h`
Massive commit to run PGINDENT on all .c and .h files. 1997-09-07 01:04:48 -04:00			`*`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 02:22:35 -04:00			`*`
			`*`
Change Copyright from PostgreSQL, Inc to PostgreSQL Global Development Group. 2001-01-24 14:43:33 -05:00			`* 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 00:58:53 -05:00			`* Portions Copyright (c) 1994, Regents of the University of California`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 02:22:35 -04:00			`*`
pgindent run on all C files. Java run to follow. initdb/regression tests pass. 2001-10-25 01:50:21 -04:00			`* $Id: nodeHash.h,v 1.21 2001/10/25 05:49:59 momjian Exp $`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 02:22:35 -04:00			`*`
			`*-------------------------------------------------------------------------`
			`*/`
Massive commit to run PGINDENT on all .c and .h files. 1997-09-07 01:04:48 -04:00			`#ifndef NODEHASH_H`
			`#define NODEHASH_H`
Postgres95 1.01 Distribution - Virgin Sources 1996-07-09 02:22:35 -04:00
Cleanup up include files. 1997-11-25 20:26:13 -05:00			`#include "nodes/plannodes.h"`
pgindent run before 6.3 release, with Thomas' requested changes. 1998-02-25 23:46:47 -05:00
Used modified version of indent that understands over 100 typedefs. 1997-09-08 17:56:23 -04:00			`extern TupleTableSlot ExecHash(Hash node);`
			`extern bool ExecInitHash(Hash node, EState estate, Plan *parent);`
			`extern int ExecCountSlotsHash(Hash *node);`
			`extern void ExecEndHash(Hash *node);`
			`extern HashJoinTable ExecHashTableCreate(Hash *node);`
Another PGINDENT run that changes variable indenting and case label indenting. Also static variable indenting. 1997-09-07 22:41:22 -04:00			`extern void ExecHashTableDestroy(HashJoinTable hashtable);`
First stage of reclaiming memory in executor by resetting short-term memory contexts. Currently, only leaks in expressions executed as quals or projections are handled. Clean up some old dead cruft in executor while at it --- unused fields in state nodes, that sort of thing. 2000-07-11 22:37:39 -04:00			`extern void ExecHashTableInsert(HashJoinTable hashtable,`
pgindent run. Make it all clean. 2001-03-21 23:01:46 -05:00			`ExprContext *econtext,`
			`Node *hashkey);`
First stage of reclaiming memory in executor by resetting short-term memory contexts. Currently, only leaks in expressions executed as quals or projections are handled. Clean up some old dead cruft in executor while at it --- unused fields in state nodes, that sort of thing. 2000-07-11 22:37:39 -04:00			`extern int ExecHashGetBucket(HashJoinTable hashtable,`
pgindent run. Make it all clean. 2001-03-21 23:01:46 -05:00			`ExprContext *econtext,`
			`Node *hashkey);`
Rewrite hash join to use simple linked lists instead of a fixed-size hashtable. This should prevent 'hashtable out of memory' errors, unless you really do run out of memory. Note: target size for hashtable is now taken from -S postmaster switch, not -B, since it is local memory in the backend rather than shared memory. 1999-05-18 17:33:06 -04:00			`extern HeapTuple ExecScanHashBucket(HashJoinState hjstate, List hjclauses,`
pgindent run over code. 1999-05-25 12:15:34 -04:00			`ExprContext *econtext);`
Rewrite hash join to use simple linked lists instead of a fixed-size hashtable. This should prevent 'hashtable out of memory' errors, unless you really do run out of memory. Note: target size for hashtable is now taken from -S postmaster switch, not -B, since it is local memory in the backend rather than shared memory. 1999-05-18 17:33:06 -04:00			`extern void ExecHashTableReset(HashJoinTable hashtable, long ntuples);`
Subselects... 1998-02-12 22:46:56 -05:00			`extern void ExecReScanHash(Hash node, ExprContext exprCtxt, Plan *parent);`
Make planner compute the number of hash buckets the same way that nodeHash.c will compute it (by sharing code). 2001-06-10 20:17:08 -04:00			`extern void ExecChooseHashTableSize(double ntuples, int tupwidth,`
pgindent run on all C files. Java run to follow. initdb/regression tests pass. 2001-10-25 01:50:21 -04:00			`int *virtualbuckets,`
			`int *physicalbuckets,`
			`int *numbatches);`
OK, folks, here is the pgindent output. 1998-09-01 00:40:42 -04:00			`#endif /* NODEHASH_H */`