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Ensure only one backend tries to extend relation at the same time - fixes #41

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Andrew Kane
2022-11-02 12:23:49 -07:00
parent 349d844fa1
commit 2a3c0a769a
1 changed files with 15 additions and 2 deletions
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17
src/ivfinsert.c
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@@ -97,9 +97,21 @@ InsertTuple(Relation rel, IndexTuple itup, Relation heapRel, Datum *values)
} }
else else
{ {
Buffer metabuf;
Buffer newbuf;
Page newpage;
/*
* From ReadBufferExtended: Caller is responsible for ensuring
* that only one backend tries to extend a relation at the same
* time!
*/
metabuf = ReadBuffer(rel, IVFFLAT_METAPAGE_BLKNO);
LockBuffer(metabuf, BUFFER_LOCK_EXCLUSIVE);
/* Add a new page */ /* Add a new page */
Buffer newbuf = IvfflatNewBuffer(rel, MAIN_FORKNUM); newbuf = IvfflatNewBuffer(rel, MAIN_FORKNUM);
Page newpage = GenericXLogRegisterBuffer(state, newbuf, GENERIC_XLOG_FULL_IMAGE); newpage = GenericXLogRegisterBuffer(state, newbuf, GENERIC_XLOG_FULL_IMAGE);
insertPage = BufferGetBlockNumber(newbuf); insertPage = BufferGetBlockNumber(newbuf);
@@ -117,6 +129,7 @@ InsertTuple(Relation rel, IndexTuple itup, Relation heapRel, Datum *values)
/* Unlock */ /* Unlock */
UnlockReleaseBuffer(buf); UnlockReleaseBuffer(buf);
UnlockReleaseBuffer(newbuf); UnlockReleaseBuffer(newbuf);
UnlockReleaseBuffer(metabuf);
} }
} }