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Transaction safe Truncate

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Rod Taylor
This commit is contained in:
Bruce Momjian
2002-11-23 04:05:52 +00:00
parent a2b4a7071d
commit d46f3de363
5 changed files with 68 additions and 29 deletions
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39
src/backend/commands/cluster.c
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@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.95 2002/11/18 17:12:07 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.96 2002/11/23 04:05:51 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,12 +20,13 @@
#include "access/genam.h"
#include "access/heapam.h"
#include "catalog/catalog.h"
#include "catalog/catname.h"
#include "catalog/dependency.h"
#include "catalog/heap.h"
#include "catalog/index.h"
#include "catalog/indexing.h"
#include "catalog/catname.h"
#include "catalog/namespace.h"
#include "catalog/pg_constraint.h"
#include "commands/cluster.h"
#include "commands/tablecmds.h"
#include "miscadmin.h"
@ -63,7 +64,6 @@ typedef struct
static Oid make_new_heap(Oid OIDOldHeap, const char *NewName);
static void copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex);
static List *get_indexattr_list(Relation OldHeap, Oid OldIndex);
static void recreate_indexattr(Oid OIDOldHeap, List *indexes);
static void swap_relfilenodes(Oid r1, Oid r2);
static void cluster_rel(relToCluster *rv);
@ -92,11 +92,8 @@ static MemoryContext cluster_context = NULL;
void
cluster_rel(relToCluster *rvtc)
{
Oid OIDNewHeap;
Relation OldHeap,
OldIndex;
char NewHeapName[NAMEDATALEN];
ObjectAddress object;
List *indexes;
/* Check for user-requested abort. */
@ -172,6 +169,22 @@ cluster_rel(relToCluster *rvtc)
index_close(OldIndex);
heap_close(OldHeap, NoLock);
/* rebuild_rel does all the dirty work */
rebuild_rel(rvtc->tableOid, rvtc->indexOid, indexes, true);
}
void
rebuild_rel(Oid tableOid, Oid indexOid, List *indexes, bool dataCopy)
{
Oid OIDNewHeap;
char NewHeapName[NAMEDATALEN];
ObjectAddress object;
/*
* If dataCopy is true, we assume that we will be basing the
* copy off an index for cluster operations.
*/
Assert(!dataCopy || indexOid != NULL);
/*
* Create the new heap, using a temporary name in the same namespace
* as the existing table. NOTE: there is some risk of collision with
@ -180,10 +193,9 @@ cluster_rel(relToCluster *rvtc)
* namespace from the old, or we will have problems with the TEMP
* status of temp tables.
*/
snprintf(NewHeapName, NAMEDATALEN, "pg_temp_%u", rvtc->tableOid);
OIDNewHeap = make_new_heap(rvtc->tableOid, NewHeapName);
snprintf(NewHeapName, NAMEDATALEN, "pg_temp_%u", tableOid);
OIDNewHeap = make_new_heap(tableOid, NewHeapName);
/*
* We don't need CommandCounterIncrement() because make_new_heap did
* it.
@ -192,13 +204,14 @@ cluster_rel(relToCluster *rvtc)
/*
* Copy the heap data into the new table in the desired order.
*/
copy_heap_data(OIDNewHeap, rvtc->tableOid, rvtc->indexOid);
if (dataCopy)
copy_heap_data(OIDNewHeap, tableOid, indexOid);
/* To make the new heap's data visible (probably not needed?). */
CommandCounterIncrement();
/* Swap the relfilenodes of the old and new heaps. */
swap_relfilenodes(rvtc->tableOid, OIDNewHeap);
swap_relfilenodes(tableOid, OIDNewHeap);
CommandCounterIncrement();
@ -219,7 +232,7 @@ cluster_rel(relToCluster *rvtc)
* Recreate each index on the relation. We do not need
* CommandCounterIncrement() because recreate_indexattr does it.
*/
recreate_indexattr(rvtc->tableOid, indexes);
recreate_indexattr(tableOid, indexes);
}
/*
@ -322,7 +335,7 @@ copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex)
* Get the necessary info about the indexes of the relation and
* return a list of IndexAttrs structures.
*/
static List *
List *
get_indexattr_list(Relation OldHeap, Oid OldIndex)
{
List *indexes = NIL;