diff options
| author | David Rowley | 2024-04-04 03:41:13 +0000 |
|---|---|---|
| committer | David Rowley | 2024-04-04 03:41:13 +0000 |
| commit | 44086b097537a8157ee1dd98d6635b3503f2f534 (patch) | |
| tree | 4f0ce528bb5a901bb8295730f2848bfe44651cf6 /src/include/access | |
| parent | 85230a247c74b92d9676abdf6693ac9d56c373cf (diff) | |
Preliminary refactor of heap scanning functions
To allow the use of the read stream API added in b5a9b18cd for
sequential scans on heap tables, here we make some adjustments to make
that change less invasive and perhaps make the code easier to follow in
the process.
Here heapgetpage() gets broken into two functions:
1) The part which reads the block has now been moved into a function
named heapfetchbuf().
2) The part which performed pruning and populated the scan's
rs_vistuples[] array is now moved into a new function named
heap_prepare_pagescan().
The functionality provided by heap_prepare_pagescan() was only ever
required by SO_ALLOW_PAGEMODE scans, so the branching that was
previously done in heapgetpage() is no longer needed as we simply just
don't call heap_prepare_pagescan() from heapgettup() in the refactored
code.
Author: Melanie Plageman
Discussion: https://postgr.es/m/CAAKRu_YtXJiYKQvb5JsA2SkwrsizYLugs4sSOZh3EAjKUg=gEQ@mail.gmail.com
Diffstat (limited to 'src/include/access')
| -rw-r--r-- | src/include/access/heapam.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/access/heapam.h b/src/include/access/heapam.h index a307fb5f245..2765efc4e5e 100644 --- a/src/include/access/heapam.h +++ b/src/include/access/heapam.h @@ -267,7 +267,7 @@ extern TableScanDesc heap_beginscan(Relation relation, Snapshot snapshot, uint32 flags); extern void heap_setscanlimits(TableScanDesc sscan, BlockNumber startBlk, BlockNumber numBlks); -extern void heapgetpage(TableScanDesc sscan, BlockNumber block); +extern void heap_prepare_pagescan(TableScanDesc sscan); extern void heap_rescan(TableScanDesc sscan, ScanKey key, bool set_params, bool allow_strat, bool allow_sync, bool allow_pagemode); extern void heap_endscan(TableScanDesc sscan); |