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postgresql/src/include/executor/nodeHash.h

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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
Create a new file executor/execGrouping.c to centralize utility routines shared by nodeGroup, nodeAgg, and soon nodeSubplan.
2003-01-10 18:54:24 -05:00
* prototypes for nodeHash.c
Postgres95 1.01 Distribution - Virgin Sources
1996-07-09 02:22:35 -04:00
*
*
Tag appropriate files for rc3 Also performed an initial run through of upgrading our Copyright date to extend to 2005 ... first run here was very simple ... change everything where: grep 1996-2004 && the word 'Copyright' ... scanned through the generated list with 'less' first, and after, to make sure that I only picked up the right entries ...
2004-12-31 17:04:05 -05:00
* Portions Copyright (c) 1996-2005, 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
*
Tag appropriate files for rc3 Also performed an initial run through of upgrading our Copyright date to extend to 2005 ... first run here was very simple ... change everything where: grep 1996-2004 && the word 'Copyright' ... scanned through the generated list with 'less' first, and after, to make sure that I only picked up the right entries ...
2004-12-31 17:04:05 -05:00
* $PostgreSQL: pgsql/src/include/executor/nodeHash.h,v 1.35 2004/12/31 22:03:29 pgsql 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
Phase 1 of read-only-plans project: cause executor state nodes to point to plan nodes, not vice-versa. All executor state nodes now inherit from struct PlanState. Copying of plan trees has been simplified by not storing a list of SubPlans in Plan nodes (eliminating duplicate links). The executor still needs such a list, but it can build it during ExecutorStart since it has to scan the plan tree anyway. No initdb forced since no stored-on-disk structures changed, but you will need a full recompile because of node-numbering changes.
2002-12-05 10:50:39 -05:00
#include "nodes/execnodes.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 int ExecCountSlotsHash(Hash *node);
Phase 1 of read-only-plans project: cause executor state nodes to point to plan nodes, not vice-versa. All executor state nodes now inherit from struct PlanState. Copying of plan trees has been simplified by not storing a list of SubPlans in Plan nodes (eliminating duplicate links). The executor still needs such a list, but it can build it during ExecutorStart since it has to scan the plan tree anyway. No initdb forced since no stored-on-disk structures changed, but you will need a full recompile because of node-numbering changes.
2002-12-05 10:50:39 -05:00
extern HashState *ExecInitHash(Hash *node, EState *estate);
extern TupleTableSlot *ExecHash(HashState *node);
extern void ExecEndHash(HashState *node);
extern void ExecReScanHash(HashState *node, ExprContext *exprCtxt);
Revise hash join and hash aggregation code to use the same datatype- specific hash functions used by hash indexes, rather than the old not-datatype-aware ComputeHashFunc routine. This makes it safe to do hash joining on several datatypes that previously couldn't use hashing. The sets of datatypes that are hash indexable and hash joinable are now exactly the same, whereas before each had some that weren't in the other.
2003-06-22 18:04:55 -04:00
extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators);
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,
Upgrade planner and executor to allow multiple hash keys for a hash join, instead of only one. This should speed up planning (only one hash path to consider for a given pair of relations) as well as allow more effective hashing, when there are multiple hashable joinclauses.
2002-11-29 19:08:22 -05:00
List *hashkeys);
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,
Upgrade planner and executor to allow multiple hash keys for a hash join, instead of only one. This should speed up planning (only one hash path to consider for a given pair of relations) as well as allow more effective hashing, when there are multiple hashable joinclauses.
2002-11-29 19:08:22 -05:00
List *hashkeys);
pgindent run.
2003-08-03 20:43:34 -04:00
extern int ExecHashGetBatch(int bucketno, HashJoinTable hashtable);
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);
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);
Another pgindent run. Fixes enum indenting, and improves #endif spacing. Also adds space for one-line comments.
2001-10-28 01:26:15 -05:00
New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass.
2001-11-05 12:46:40 -05:00
#endif /* NODEHASH_H */
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