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Separate TBM[Shared|Private]Iterator and TBMIterateResult

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Remove the TBMIterateResult member from the TBMPrivateIterator and
TBMSharedIterator and make tbm_[shared|private_]iterate() take a
TBMIterateResult as a parameter.

This allows tidbitmap API users to manage multiple TBMIterateResults per
scan. This is required for bitmap heap scan to use the read stream API,
with which there may be multiple I/Os in flight at once, each one with a
TBMIterateResult.

Reviewed-by: Tomas Vondra <tomas@vondra.me>
Discussion: https://postgr.es/m/d4bb26c9-fe07-439e-ac53-c0e244387e01%40vondra.me
This commit is contained in:
Melanie Plageman
2025-03-15 10:10:51 -04:00
parent 799959dc7c
commit 944e81bf99
7 changed files with 110 additions and 101 deletions
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2
src/backend/access/gin/ginscan.c
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@@ -111,7 +111,7 @@ ginFillScanEntry(GinScanOpaque so, OffsetNumber attnum,
ItemPointerSetMin(&scanEntry->curItem);
scanEntry->matchBitmap = NULL;
scanEntry->matchIterator = NULL;
scanEntry->matchResult = NULL;
scanEntry->matchResult.blockno = InvalidBlockNumber;
scanEntry->matchNtuples = -1;
scanEntry->list = NULL;
scanEntry->nlist = 0;