mirror of
https://github.com/postgres/postgres.git
synced 2026-05-30 20:44:54 -04:00
Andres Freund
cc9f08b6b8
This allows us to add stack-depth checks the first time an executor
node is called, and skip that overhead on following
calls. Additionally it yields a nice speedup.
While it'd probably have been a good idea to have that check all
along, it has become more important after the new expression
evaluation framework in b8d7f053c5 - there's no stack depth
check in common paths anymore now. We previously relied on
ExecEvalExpr() being executed somewhere.
We should move towards that model for further routines, but as this is
required for v10, it seems better to only do the necessary (which
already is quite large).
Author: Andres Freund, Tom Lane
Reported-By: Julien Rouhaud
Discussion:
https://postgr.es/m/22833.1490390175@sss.pgh.pa.us
https://postgr.es/m/b0af9eaa-130c-60d0-9e4e-7a135b1e0c76@dalibo.com
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* nodeHash.h
|
|
* prototypes for nodeHash.c
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* src/include/executor/nodeHash.h
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef NODEHASH_H
|
|
#define NODEHASH_H
|
|
|
|
#include "nodes/execnodes.h"
|
|
|
|
extern HashState *ExecInitHash(Hash *node, EState *estate, int eflags);
|
|
extern Node *MultiExecHash(HashState *node);
|
|
extern void ExecEndHash(HashState *node);
|
|
extern void ExecReScanHash(HashState *node);
|
|
|
|
extern HashJoinTable ExecHashTableCreate(Hash *node, List *hashOperators,
|
|
bool keepNulls);
|
|
extern void ExecHashTableDestroy(HashJoinTable hashtable);
|
|
extern void ExecHashTableInsert(HashJoinTable hashtable,
|
|
TupleTableSlot *slot,
|
|
uint32 hashvalue);
|
|
extern bool ExecHashGetHashValue(HashJoinTable hashtable,
|
|
ExprContext *econtext,
|
|
List *hashkeys,
|
|
bool outer_tuple,
|
|
bool keep_nulls,
|
|
uint32 *hashvalue);
|
|
extern void ExecHashGetBucketAndBatch(HashJoinTable hashtable,
|
|
uint32 hashvalue,
|
|
int *bucketno,
|
|
int *batchno);
|
|
extern bool ExecScanHashBucket(HashJoinState *hjstate, ExprContext *econtext);
|
|
extern void ExecPrepHashTableForUnmatched(HashJoinState *hjstate);
|
|
extern bool ExecScanHashTableForUnmatched(HashJoinState *hjstate,
|
|
ExprContext *econtext);
|
|
extern void ExecHashTableReset(HashJoinTable hashtable);
|
|
extern void ExecHashTableResetMatchFlags(HashJoinTable hashtable);
|
|
extern void ExecChooseHashTableSize(double ntuples, int tupwidth, bool useskew,
|
|
int *numbuckets,
|
|
int *numbatches,
|
|
int *num_skew_mcvs);
|
|
extern int ExecHashGetSkewBucket(HashJoinTable hashtable, uint32 hashvalue);
|
|
|
|
#endif /* NODEHASH_H */
|