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This patch implements the following command:

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ALTER TABLE <tablename> OWNER TO <username>

Only a superuser may execute the command.

--
Mark Hollomon
mhh@mindspring.com
This commit is contained in:
Bruce Momjian
2000-09-12 05:09:57 +00:00
parent 65edb54186
commit 7f171b599a
10 changed files with 292 additions and 208 deletions
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67
src/backend/commands/command.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/command.c,v 1.101 2000/09/12 04:49:06 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/command.c,v 1.102 2000/09/12 05:09:43 momjian Exp $
*
* NOTES
* The PerformAddAttribute() code, like most of the relation
@ -47,6 +47,7 @@
#include "utils/temprel.h"
#include "executor/spi_priv.h"
#include "catalog/pg_index.h"
#include "catalog/pg_shadow.h"
#include "utils/relcache.h"
#ifdef _DROP_COLUMN_HACK__
@ -1449,6 +1450,70 @@ AlterTableDropConstraint(const char *relationName,
/*
* ALTER TABLE OWNER
*/
void
AlterTableOwner(const char *relationName, const char *newOwnerName)
{
Relation class_rel;
HeapTuple tuple;
int4 newOwnerSysid;
Relation idescs[Num_pg_class_indices];
/*
* first check that we are a superuser
*/
if (! superuser() )
elog(ERROR, "ALTER TABLE: permission denied");
/*
* look up the new owner in pg_shadow and get the sysid
*/
tuple = SearchSysCacheTuple(SHADOWNAME, PointerGetDatum(newOwnerName),
0, 0, 0);
if (!HeapTupleIsValid(tuple))
elog(ERROR, "ALTER TABLE: user \"%s\" not found", newOwnerName);
newOwnerSysid = ((Form_pg_shadow) GETSTRUCT(tuple))->usesysid;
heap_freetuple(tuple);
/*
* find the table's entry in pg_class and lock it for writing
*/
class_rel = heap_openr(RelationRelationName, RowExclusiveLock);
tuple = SearchSysCacheTuple(RELNAME, PointerGetDatum(relationName),
0, 0, 0);
if (!HeapTupleIsValid(tuple))
elog(ERROR, "ALTER TABLE: relation \"%s\" not found",
relationName);
if (((Form_pg_class) GETSTRUCT(tuple))->relkind != RELKIND_RELATION)
elog(ERROR, "ALTER TABLE: relation \"%s\" is not a table",
relationName);
/*
* modify the table's entry and write to the heap
*/
((Form_pg_class) GETSTRUCT(tuple))->relowner = newOwnerSysid;
heap_update(class_rel, &tuple->t_self, tuple, NULL);
/* Keep the catalog indices up to date */
CatalogOpenIndices(Num_pg_class_indices, Name_pg_class_indices, idescs);
CatalogIndexInsert(idescs, Num_pg_class_indices, class_rel, tuple);
CatalogCloseIndices(Num_pg_class_indices, idescs);
/*
* unlock everything and return
*/
heap_freetuple(tuple);
heap_close(class_rel, RowExclusiveLock);
return;
}
/*
* ALTER TABLE CREATE TOAST TABLE
*/