database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-27 07:42:10 +03:00
Code Activity

Add optimizer and executor support for parallel index-only scans.

Browse Source 
Commit 5262f7a4fc 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
This commit is contained in:
Robert Haas
2017-02-19 15:53:59 +05:30
parent 16be2fd100
commit 0414b26bac
7 changed files with 191 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/include/executor/nodeIndexonlyscan.h
View File

@@ -15,6 +15,7 @@
#define NODEINDEXONLYSCAN_H
#include "nodes/execnodes.h"
#include "access/parallel.h"
extern IndexOnlyScanState *ExecInitIndexOnlyScan(IndexOnlyScan *node, EState *estate, int eflags);
extern TupleTableSlot *ExecIndexOnlyScan(IndexOnlyScanState *node);
@@ -23,4 +24,12 @@ extern void ExecIndexOnlyMarkPos(IndexOnlyScanState *node);
extern void ExecIndexOnlyRestrPos(IndexOnlyScanState *node);
extern void ExecReScanIndexOnlyScan(IndexOnlyScanState *node);
/* Support functions for parallel index-only scans */
extern void ExecIndexOnlyScanEstimate(IndexOnlyScanState *node,
ParallelContext *pcxt);
extern void ExecIndexOnlyScanInitializeDSM(IndexOnlyScanState *node,
ParallelContext *pcxt);
extern void ExecIndexOnlyScanInitializeWorker(IndexOnlyScanState *node,
shm_toc *toc);
#endif /* NODEINDEXONLYSCAN_H */