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Make ALTER TABLE RENAME COLUMN update column names of indexes that

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refer to the renamed column.  Brent Verner, with a little help from tgl.
This commit is contained in:
Tom Lane 2001-10-08 18:40:04 +00:00
parent 7249562fe3
commit b6a7948294
1 changed files with 64 additions and 5 deletions
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69
src/backend/commands/rename.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/rename.c,v 1.57 2001/08/12 21:35:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/rename.c,v 1.58 2001/10/08 18:40:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,6 +18,7 @@
#include "access/heapam.h"
#include "catalog/catname.h"
#include "catalog/pg_index.h"
#include "catalog/pg_type.h"
#include "catalog/heap.h"
#include "catalog/indexing.h"
@ -47,9 +48,6 @@
* modify attname in attribute tuple
* insert modified attribute in attribute catalog
* delete original attribute from attribute catalog
*
* XXX Renaming an indexed attribute must (eventually) also change
* the attribute name in the associated indexes.
*/
void
renameatt(char *relname,
@ -62,6 +60,8 @@ renameatt(char *relname,
HeapTuple reltup,
atttup;
Oid relid;
List *indexoidlist;
List *indexoidscan;
/*
* permissions checking. this would normally be done in utility.c,
@ -83,7 +83,6 @@ renameatt(char *relname,
*/
targetrelation = heap_openr(relname, AccessExclusiveLock);
relid = RelationGetRelid(targetrelation);
heap_close(targetrelation, NoLock); /* close rel but keep lock! */
/*
* if the 'recurse' flag is set then we are supposed to rename this
@ -166,7 +165,67 @@ renameatt(char *relname,
}
heap_freetuple(atttup);
/*
* Update column names of indexes that refer to the column being renamed.
*/
indexoidlist = RelationGetIndexList(targetrelation);
foreach(indexoidscan, indexoidlist)
{
Oid indexoid = lfirsti(indexoidscan);
HeapTuple indextup;
/*
* First check to see if index is a functional index.
* If so, its column name is a function name and shouldn't
* be renamed here.
*/
indextup = SearchSysCache(INDEXRELID,
ObjectIdGetDatum(indexoid),
0, 0, 0);
if (!HeapTupleIsValid(indextup))
elog(ERROR, "renameatt: can't find index id %u", indexoid);
if (OidIsValid(((Form_pg_index) GETSTRUCT(indextup))->indproc))
{
ReleaseSysCache(indextup);
continue;
}
ReleaseSysCache(indextup);
/*
* Okay, look to see if any column name of the index matches
* the old attribute name.
*/
atttup = SearchSysCacheCopy(ATTNAME,
ObjectIdGetDatum(indexoid),
PointerGetDatum(oldattname),
0, 0);
if (!HeapTupleIsValid(atttup))
continue; /* Nope, so ignore it */
/*
* Update the (copied) attribute tuple.
*/
StrNCpy(NameStr(((Form_pg_attribute) GETSTRUCT(atttup))->attname),
newattname, NAMEDATALEN);
simple_heap_update(attrelation, &atttup->t_self, atttup);
/* keep system catalog indices current */
{
Relation irelations[Num_pg_attr_indices];
CatalogOpenIndices(Num_pg_attr_indices, Name_pg_attr_indices, irelations);
CatalogIndexInsert(irelations, Num_pg_attr_indices, attrelation, atttup);
CatalogCloseIndices(Num_pg_attr_indices, irelations);
}
heap_freetuple(atttup);
}
freeList(indexoidlist);
heap_close(attrelation, RowExclusiveLock);
heap_close(targetrelation, NoLock); /* close rel but keep lock! */
}
/*