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Updated comment [skip ci]

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Andrew Kane
2024-09-22 10:10:55 -07:00
parent 3fba403f8f
commit 08420b6404
1 changed files with 6 additions and 2 deletions
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8
src/hnswscan.c
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@@ -235,8 +235,12 @@ hnswgettuple(IndexScanDesc scan, ScanDirection dir)
{ {
/* /*
* Locking ensures when neighbors are read, the elements they * Locking ensures when neighbors are read, the elements they
* reference will not be marked as deleted (and replaced) * reference will not be deleted (and replaced) during the
* during the iteration * iteration.
*
* Elements loaded into memory on previous iterations may have
* been deleted (and replaced), so when reading neighbors, the
* element version must be checked.
*/ */
LockPage(scan->indexRelation, HNSW_SCAN_LOCK, ShareLock); LockPage(scan->indexRelation, HNSW_SCAN_LOCK, ShareLock);