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Phase 2 of hashed-aggregation project. nodeAgg.c now knows how to do

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hashed aggregation, but there's not yet planner support for it.
This commit is contained in:
Tom Lane
2002-11-06 22:31:24 +00:00
parent fc9814d17e
commit 2103b7baa2
12 changed files with 696 additions and 266 deletions
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23
src/backend/executor/nodeHash.c
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@ -7,7 +7,8 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* $Id: nodeHash.c,v 1.66 2002/09/04 20:31:18 momjian Exp $
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeHash.c,v 1.67 2002/11/06 22:31:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -31,8 +32,6 @@
#include "utils/lsyscache.h"
static uint32 hashFunc(Datum key, int typLen, bool byVal);
/* ----------------------------------------------------------------
* ExecHash
*
@ -532,7 +531,7 @@ ExecHashGetBucket(HashJoinTable hashtable,
/*
* We reset the eval context each time to reclaim any memory leaked in
* the hashkey expression or hashFunc itself.
* the hashkey expression or ComputeHashFunc itself.
*/
ResetExprContext(econtext);
@ -550,9 +549,9 @@ ExecHashGetBucket(HashJoinTable hashtable,
bucketno = 0;
else
{
bucketno = hashFunc(keyval,
(int) hashtable->typLen,
hashtable->typByVal)
bucketno = ComputeHashFunc(keyval,
(int) hashtable->typLen,
hashtable->typByVal)
% (uint32) hashtable->totalbuckets;
}
@ -622,16 +621,16 @@ ExecScanHashBucket(HashJoinState *hjstate,
}
/* ----------------------------------------------------------------
* hashFunc
* ComputeHashFunc
*
* the hash function for hash joins
* the hash function for hash joins (also used for hash aggregation)
*
* XXX this probably ought to be replaced with datatype-specific
* hash functions, such as those already implemented for hash indexes.
* ----------------------------------------------------------------
*/
static uint32
hashFunc(Datum key, int typLen, bool byVal)
uint32
ComputeHashFunc(Datum key, int typLen, bool byVal)
{
unsigned char *k;
@ -681,7 +680,7 @@ hashFunc(Datum key, int typLen, bool byVal)
}
else
{
elog(ERROR, "hashFunc: Invalid typLen %d", typLen);
elog(ERROR, "ComputeHashFunc: Invalid typLen %d", typLen);
k = NULL; /* keep compiler quiet */
}
}