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lock while initializing relfilenode

merge-cstore-pykello
Jeff Davis 2020-09-11 16:02:00 -07:00
parent b18c9c8060
commit a2f7eadeb9
1 changed files with 9 additions and 0 deletions
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9
cstore_fdw.c
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@ -948,12 +948,21 @@ InitializeRelFileNode(Relation relation)
if (!OidIsValid(classform->relfilenode)) if (!OidIsValid(classform->relfilenode))
{ {
Relation tmprel;
Oid tablespace; Oid tablespace;
Oid filenode = relation->rd_id; Oid filenode = relation->rd_id;
char persistence = relation->rd_rel->relpersistence; char persistence = relation->rd_rel->relpersistence;
RelFileNode newrnode; RelFileNode newrnode;
SMgrRelation srel; SMgrRelation srel;
/*
* Upgrade to AccessExclusiveLock, and hold until the end of the
* transaction. This shouldn't happen during a read, but it's hard to
* prove that because it happens lazily.
*/
tmprel = heap_open(relation->rd_id, AccessExclusiveLock);
heap_close(tmprel, NoLock);
if (OidIsValid(relation->rd_rel->reltablespace)) if (OidIsValid(relation->rd_rel->reltablespace))
tablespace = relation->rd_rel->reltablespace; tablespace = relation->rd_rel->reltablespace;
else else