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0414b26bac
Commit 5262f7a4fc44f651241d2ff1fa688dd664a34874 added similar support for parallel index scans; this extends that work to index-only scans. As with parallel index scans, this requires support from the index AM, so currently parallel index-only scans will only be possible for btree indexes. Rafia Sabih, reviewed and tested by Rahila Syed, Tushar Ahuja, and Amit Kapila Discussion: http://postgr.es/m/CAOGQiiPEAs4C=TBp0XShxBvnWXuzGL2u++Hm1=qnCpd6_Mf8Fw@mail.gmail.com
36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* nodeIndexonlyscan.h
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*
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*
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*
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* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/executor/nodeIndexonlyscan.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NODEINDEXONLYSCAN_H
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#define NODEINDEXONLYSCAN_H
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#include "nodes/execnodes.h"
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#include "access/parallel.h"
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extern IndexOnlyScanState *ExecInitIndexOnlyScan(IndexOnlyScan *node, EState *estate, int eflags);
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extern TupleTableSlot *ExecIndexOnlyScan(IndexOnlyScanState *node);
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extern void ExecEndIndexOnlyScan(IndexOnlyScanState *node);
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extern void ExecIndexOnlyMarkPos(IndexOnlyScanState *node);
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extern void ExecIndexOnlyRestrPos(IndexOnlyScanState *node);
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extern void ExecReScanIndexOnlyScan(IndexOnlyScanState *node);
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/* Support functions for parallel index-only scans */
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extern void ExecIndexOnlyScanEstimate(IndexOnlyScanState *node,
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ParallelContext *pcxt);
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extern void ExecIndexOnlyScanInitializeDSM(IndexOnlyScanState *node,
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ParallelContext *pcxt);
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extern void ExecIndexOnlyScanInitializeWorker(IndexOnlyScanState *node,
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shm_toc *toc);
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#endif /* NODEINDEXONLYSCAN_H */
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