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Improve behavior of concurrent CLUSTER.

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In the previous coding, a user could queue up for an AccessExclusiveLock
on a table they did not have permission to cluster, thus potentially
interfering with access by authorized users who got stuck waiting behind
the AccessExclusiveLock.  This approach avoids that.  cluster() has the
same permissions-checking requirements as REINDEX TABLE, so this commit
moves the now-shared callback to tablecmds.c and renames it, per
discussion with Noah Misch.
This commit is contained in:
Robert Haas
2011-12-21 15:17:28 -05:00
parent d573e239f0
commit cbe24a6dd8
4 changed files with 47 additions and 43 deletions
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3
src/include/commands/tablecmds.h
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@@ -71,4 +71,7 @@ extern void AtEOSubXact_on_commit_actions(bool isCommit,
SubTransactionId mySubid,
SubTransactionId parentSubid);
extern void RangeVarCallbackOwnsTable(const RangeVar *relation,
Oid relId, Oid oldRelId, void *arg);
#endif /* TABLECMDS_H */