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Support renaming of tablespaces, and changing the owners of

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aggregates, conversions, functions, operators, operator classes,
schemas, types, and tablespaces.  Fold the existing implementations
of alter domain owner and alter database owner in with these.

Christopher Kings-Lynne
This commit is contained in:
Tom Lane
2004-06-25 21:55:59 +00:00
parent 1621192b11
commit 0adfa2c39d
40 changed files with 1380 additions and 234 deletions
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122
src/backend/commands/tablespace.c
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@@ -45,7 +45,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.3 2004/06/21 04:06:06 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.4 2004/06/25 21:55:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -669,3 +669,123 @@ get_tablespace_name(Oid spc_oid)
return result;
}
/*
* Rename a tablespace
*/
void
RenameTableSpace(const char *oldname, const char *newname)
{
Relation rel;
ScanKeyData entry[1];
HeapScanDesc scan;
HeapTuple tup;
HeapTuple newtuple;
Form_pg_tablespace newform;
/* Search pg_tablespace */
rel = heap_openr(TableSpaceRelationName, RowExclusiveLock);
ScanKeyInit(&entry[0],
Anum_pg_tablespace_spcname,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(oldname));
scan = heap_beginscan(rel, SnapshotNow, 1, entry);
tup = heap_getnext(scan, ForwardScanDirection);
if (!HeapTupleIsValid(tup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("tablespace \"%s\" does not exist",
oldname)));
newtuple = heap_copytuple(tup);
newform = (Form_pg_tablespace) GETSTRUCT(newtuple);
heap_endscan(scan);
/* Must be owner or superuser */
if (newform->spcowner != GetUserId() && !superuser())
aclcheck_error(ACLCHECK_NO_PRIV, ACL_KIND_TABLESPACE, oldname);
/* Validate new name */
if (!allowSystemTableMods && IsReservedName(newname))
ereport(ERROR,
(errcode(ERRCODE_RESERVED_NAME),
errmsg("unacceptable tablespace name \"%s\"", newname),
errdetail("The prefix \"pg_\" is reserved for system tablespaces.")));
/* Make sure the new name doesn't exist */
ScanKeyInit(&entry[0],
Anum_pg_tablespace_spcname,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(newname));
scan = heap_beginscan(rel, SnapshotNow, 1, entry);
tup = heap_getnext(scan, ForwardScanDirection);
if (HeapTupleIsValid(tup))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("tablespace \"%s\" already exists",
newname)));
heap_endscan(scan);
/* OK, update the entry */
namestrcpy(&(newform->spcname), newname);
simple_heap_update(rel, &newtuple->t_self, newtuple);
CatalogUpdateIndexes(rel, newtuple);
heap_close(rel, NoLock);
}
/*
* Change tablespace owner
*/
void
AlterTableSpaceOwner(const char *name, AclId newOwnerSysId)
{
Relation rel;
ScanKeyData entry[1];
HeapScanDesc scandesc;
Form_pg_tablespace spcForm;
HeapTuple tup;
HeapTuple newtuple;
/* Search pg_tablespace */
rel = heap_openr(TableSpaceRelationName, RowExclusiveLock);
ScanKeyInit(&entry[0],
Anum_pg_tablespace_spcname,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(name));
scandesc = heap_beginscan(rel, SnapshotNow, 1, entry);
tup = heap_getnext(scandesc, ForwardScanDirection);
if (!HeapTupleIsValid(tup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("tablespace \"%s\" does not exist", name)));
newtuple = heap_copytuple(tup);
spcForm = (Form_pg_tablespace) GETSTRUCT(newtuple);
/*
* If the new owner is the same as the existing owner, consider the
* command to have succeeded. This is for dump restoration purposes.
*/
if (spcForm->spcowner != newOwnerSysId)
{
/* Otherwise, must be superuser to change object ownership */
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to change owner")));
/* Modify the owner */
spcForm->spcowner = newOwnerSysId;
simple_heap_update(rel, &newtuple->t_self, newtuple);
CatalogUpdateIndexes(rel, newtuple);
}
heap_endscan(scandesc);
heap_close(rel, NoLock);
}