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Viewing changes to src/backend/commands/cluster.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2011-06-14 09:53:29 UTC
  • mto: (6.1.1 sid) (10.1.1 oneiric-proposed) (1.2.1)
  • mto: This revision was merged to the branch mainline in revision 5.
  • Revision ID: james.westby@ubuntu.com-20110614095329-71gfhjywyp2c27au
Tags: upstream-9.1~beta2
Import upstream version 9.1~beta2

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src/backend/commands/cluster.c
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#include "miscadmin.h"
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#include "optimizer/planner.h"
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#include "storage/bufmgr.h"
 
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#include "storage/lmgr.h"
 
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#include "storage/predicate.h"
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#include "storage/procarray.h"
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#include "storage/smgr.h"
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#include "utils/acl.h"
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        if (OidIsValid(indexOid))
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                check_index_is_clusterable(OldHeap, indexOid, recheck, AccessExclusiveLock);
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        /*
 
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         * All predicate locks on the tuples or pages are about to be made
 
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         * invalid, because we move tuples around.      Promote them to relation
 
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         * locks.  Predicate locks on indexes will be promoted when they are
 
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         * reindexed.
 
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         */
 
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        TransferPredicateLocksToHeapRelation(OldHeap);
 
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        /* rebuild_relation does all the dirty work */
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        rebuild_relation(OldHeap, indexOid, freeze_min_age, freeze_table_age,
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                                         verbose);
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        isnull = (bool *) palloc(natts * sizeof(bool));
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        /*
 
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         * If the OldHeap has a toast table, get lock on the toast table to keep
 
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         * it from being vacuumed.      This is needed because autovacuum processes
 
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         * toast tables independently of their main tables, with no lock on the
 
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         * latter.      If an autovacuum were to start on the toast table after we
 
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         * compute our OldestXmin below, it would use a later OldestXmin, and then
 
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         * possibly remove as DEAD toast tuples belonging to main tuples we think
 
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         * are only RECENTLY_DEAD.      Then we'd fail while trying to copy those
 
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         * tuples.
 
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         *
 
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         * We don't need to open the toast relation here, just lock it.  The lock
 
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         * will be held till end of transaction.
 
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         */
 
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        if (OldHeap->rd_rel->reltoastrelid)
 
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                LockRelationOid(OldHeap->rd_rel->reltoastrelid, AccessExclusiveLock);
 
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        /*
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         * We need to log the copied data in WAL iff WAL archiving/streaming is
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         * enabled AND it's not a WAL-logged rel.
 
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         * enabled AND it's a WAL-logged rel.
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         */
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        use_wal = XLogIsNeeded() && RelationNeedsWAL(NewHeap);
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