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Commit2636ecf

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Lock relation used to generate fresh data for RMV.
The relation should not be accessible to any other process, but itshould be locked for consistency. Since this is not known tocause any bug, it will not be back-patch, at least for now.Per report from Andres Freund
1 parent6331de1 commit2636ecf

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‎src/backend/commands/matview.c

Lines changed: 7 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -30,6 +30,7 @@
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#include"miscadmin.h"
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#include"parser/parse_relation.h"
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#include"rewrite/rewriteHandler.h"
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#include"storage/lmgr.h"
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#include"storage/smgr.h"
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#include"tcop/tcopprot.h"
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#include"utils/builtins.h"
@@ -240,9 +241,14 @@ ExecRefreshMatView(RefreshMatViewStmt *stmt, const char *queryString,
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heap_close(matviewRel,NoLock);
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243-
/* Create the transient table that will receive the regenerated data. */
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/*
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* Create the transient table that will receive the regenerated data.
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* Lock it against access by any other process until commit (by which time
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* it will be gone).
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*/
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OIDNewHeap=make_new_heap(matviewOid,tableSpace,concurrent,
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ExclusiveLock);
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LockRelationOid(OIDNewHeap,AccessExclusiveLock);
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dest=CreateTransientRelDestReceiver(OIDNewHeap);
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/* Generate the data, if wanted. */

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