diff options
| author | Tom Lane | 2005-03-06 22:15:05 +0000 |
|---|---|---|
| committer | Tom Lane | 2005-03-06 22:15:05 +0000 |
| commit | 00659aa29dcb4906a818869fe08cb4e240d2e717 (patch) | |
| tree | 8f83ac2a0ba82ee4436469c1079cac9855f562ec /src/include/executor/nodeHash.h | |
| parent | f716d4f6a24b352112127aa9342ccd3f6bb9dba1 (diff) | |
Revise hash join code so that we can increase the number of batches
on-the-fly, and thereby avoid blowing out memory when the planner has
underestimated the hash table size. Hash join will now obey the
work_mem limit with some faithfulness. Per my recent proposal
(hash aggregate part isn't done yet though).
Diffstat (limited to 'src/include/executor/nodeHash.h')
| -rw-r--r-- | src/include/executor/nodeHash.h | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/src/include/executor/nodeHash.h b/src/include/executor/nodeHash.h index ba289849d8..bdda454fdc 100644 --- a/src/include/executor/nodeHash.h +++ b/src/include/executor/nodeHash.h @@ -25,18 +25,20 @@ extern void ExecReScanHash(HashState *node, ExprContext *exprCtxt); extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators); extern void ExecHashTableDestroy(HashJoinTable hashtable); extern void ExecHashTableInsert(HashJoinTable hashtable, - ExprContext *econtext, - List *hashkeys); -extern int ExecHashGetBucket(HashJoinTable hashtable, - ExprContext *econtext, - List *hashkeys); -extern int ExecHashGetBatch(int bucketno, HashJoinTable hashtable); -extern HeapTuple ExecScanHashBucket(HashJoinState *hjstate, List *hjclauses, - ExprContext *econtext); -extern void ExecHashTableReset(HashJoinTable hashtable, long ntuples); + HeapTuple tuple, + uint32 hashvalue); +extern uint32 ExecHashGetHashValue(HashJoinTable hashtable, + ExprContext *econtext, + List *hashkeys); +extern void ExecHashGetBucketAndBatch(HashJoinTable hashtable, + uint32 hashvalue, + int *bucketno, + int *batchno); +extern HeapTuple ExecScanHashBucket(HashJoinState *hjstate, + ExprContext *econtext); +extern void ExecHashTableReset(HashJoinTable hashtable); extern void ExecChooseHashTableSize(double ntuples, int tupwidth, - int *virtualbuckets, - int *physicalbuckets, + int *numbuckets, int *numbatches); #endif /* NODEHASH_H */ |