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Code Issues Releases Wiki Activity

Fixes: 

CLUSTER command couldn't rename correctly the new created heap relation.
The table base name resulted in some "temp_XXXX" instead of the correct
base name.

Submitted by: Dirk Koeser <koeser@informatik.uni-rostock.de>
This commit is contained in:
Marc G. Fournier 1996-08-15 07:39:24 +00:00
parent 4844adc888
commit d6fa4d95cd
1 changed files with 34 additions and 37 deletions
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71
src/backend/commands/cluster.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.1.1.1 1996/07/09 06:21:19 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.2 1996/08/15 07:39:24 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -105,9 +105,18 @@ cluster(char oldrelname[], char oldindexname[])
Relation OldHeap, OldIndex;
Relation NewHeap;
char *NewIndexName;
char *szNewHeapName;
char NewIndexName[NAMEDATALEN+1];
char NewHeapName[NAMEDATALEN+1];
char saveoldrelname[NAMEDATALEN+1];
char saveoldindexname[NAMEDATALEN+1];
/* Save the old names because they will get lost when the old relations
* are destroyed.
*/
strcpy(saveoldrelname, oldrelname);
strcpy(saveoldindexname, oldindexname);
/*
*
* I'm going to force all checking back into the commands.c function.
@ -153,55 +162,42 @@ cluster(char oldrelname[], char oldindexname[])
*/
NewHeap = copy_heap(OIDOldHeap);
OIDNewHeap = NewHeap->rd_id;
szNewHeapName = pstrdup(NewHeap->rd_rel->relname.data);
strcpy(NewHeapName,NewHeap->rd_rel->relname.data);
/* Need to do this to make the new heap visible. */
/* To make the new heap visible (which is until now empty). */
CommandCounterIncrement();
rebuildheap(OIDNewHeap, OIDOldHeap, OIDOldIndex);
/* Need to do this to make the new heap visible. */
/* To flush the filled new heap (and the statistics about it). */
CommandCounterIncrement();
/* can't be found in the SysCache. */
copy_index(OIDOldIndex, OIDNewHeap); /* No contention with the old */
/* Create new index over the tuples of the new heap. */
copy_index(OIDOldIndex, OIDNewHeap);
sprintf(NewIndexName, "temp_%x", OIDOldIndex);
/*
* make this really happen. Flush all the buffers.
* (Believe me, it is necessary ... ended up in a mess without it.)
*/
CommitTransactionCommand();
StartTransactionCommand();
/*
* Questionable bit here. Because the renamerel destroys all trace of the
* pre-existing relation, I'm going to Destroy old, and then rename new
* to old. If this fails, it fails, and you lose your old. Tough - say
* I. Have good backups!
*/
/*
Here lies the bogosity. The RelationNameGetRelation returns a bad
list of TupleDescriptors. Damn. Can't work out why this is.
*/
/* Destroy old heap (along with its index) and rename new. */
heap_destroy(oldrelname);
heap_destroy(oldrelname); /* AAAAAAAAGH!! */
CommandCounterIncrement();
/*
* The Commit flushes all palloced memory, so I have to grab the
* New stuff again. This is annoying, but oh heck!
renamerel(NewHeapName, saveoldrelname);
TypeRename(NewHeapName, saveoldrelname);
renamerel(NewIndexName, saveoldindexname);
/*
* Again flush all the buffers.
*/
/*
renamerel(szNewHeapName.data, oldrelname);
TypeRename(&szNewHeapName, &szOldRelName);
sprintf(NewIndexName.data, "temp_%x", OIDOldIndex);
renamerel(NewIndexName.data, szOldIndexName.data);
*/
NewIndexName = palloc(NAMEDATALEN+1); /* XXX */
sprintf(NewIndexName, "temp_%x", OIDOldIndex);
renamerel(NewIndexName, oldindexname);
CommitTransactionCommand();
StartTransactionCommand();
}
Relation
@ -362,6 +358,7 @@ rebuildheap(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex)
pfree(ScanResult);
ReleaseBuffer(LocalBuffer);
}
index_endscan(ScanDesc);
index_close(LocalOldIndex);
heap_close(LocalOldHeap);