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nbtree: assert no scheduled primscan between pages.

2024年10月30日 19:53:26 +0000 (15:53 -0400)

Follow-up to bugfix commit 763d65ae. Technically this new assertion is
redundant with the assertion recently added to _bt_readpage by that same
commit, but it seems like a good idea to have both.

The new assertion makes it clear that we expect to call _bt_readnextpage
when there's another primitive index scan scheduled, though only when
needed as the final step of ending the current primitive scan.

src/backend/access/nbtree/nbtsearch.c patch | blob | blame | history

diff --git a/src/backend/access/nbtree/nbtsearch.c b/src/backend/access/nbtree/nbtsearch.c

index b082cc80f6c854c2c13a6dc309a9d6e75b64f95a..e718668ed6915dfa207e4130f87486e721a07abf 100644 (file)

--- a/src/backend/access/nbtree/nbtsearch.c

+++ b/src/backend/access/nbtree/nbtsearch.c

@@ -2272,6 +2272,8 @@ _bt_readnextpage(IndexScanDesc scan, BlockNumber blkno,

return false;

}

+ Assert(!so->needPrimScan);

if (ScanDirectionIsForward(dir))

{

/* read blkno, but check for interrupts first */

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