database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-25 13:17:41 +03:00
Code Activity

Extend index AM API for parallel index scans.

Browse Source 
This patch doesn't actually make any index AM parallel-aware, but it
provides the necessary functions at the AM layer to do so.

Rahila Syed, Amit Kapila, Robert Haas
This commit is contained in:
Robert Haas
2017-01-24 16:42:58 -05:00
parent 587cda35ca
commit 7b4ac19982
14 changed files with 262 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/include/access/genam.h
View File

@@ -83,6 +83,8 @@ typedef bool (*IndexBulkDeleteCallback) (ItemPointer itemptr, void *state);
typedef struct IndexScanDescData *IndexScanDesc;
typedef struct SysScanDescData *SysScanDesc;
typedef struct ParallelIndexScanDescData *ParallelIndexScanDesc;
/*
* Enumeration specifying the type of uniqueness check to perform in
* index_insert().
@@ -144,6 +146,13 @@ extern void index_rescan(IndexScanDesc scan,
extern void index_endscan(IndexScanDesc scan);
extern void index_markpos(IndexScanDesc scan);
extern void index_restrpos(IndexScanDesc scan);
extern Size index_parallelscan_estimate(Relation indexrel, Snapshot snapshot);
extern void index_parallelscan_initialize(Relation heaprel, Relation indexrel,
Snapshot snapshot, ParallelIndexScanDesc target);
extern void index_parallelrescan(IndexScanDesc scan);
extern IndexScanDesc index_beginscan_parallel(Relation heaprel,
Relation indexrel, int nkeys, int norderbys,
ParallelIndexScanDesc pscan);
extern ItemPointer index_getnext_tid(IndexScanDesc scan,
ScanDirection direction);
extern HeapTuple index_fetch_heap(IndexScanDesc scan);