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PostgreSQL/src/backend/commands/alter.c
Tom Lane 382ceffdf7 Phase 3 of pgindent updates. 
Don't move parenthesized lines to the left, even if that means they
flow past the right margin.

By default, BSD indent lines up statement continuation lines that are
within parentheses so that they start just to the right of the preceding
left parenthesis.  However, traditionally, if that resulted in the
continuation line extending to the right of the desired right margin,
then indent would push it left just far enough to not overrun the margin,
if it could do so without making the continuation line start to the left of
the current statement indent.  That makes for a weird mix of indentations
unless one has been completely rigid about never violating the 80-column
limit.

This behavior has been pretty universally panned by Postgres developers.
Hence, disable it with indent's new -lpl switch, so that parenthesized
lines are always lined up with the preceding left paren.

This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.

Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
2017-06-21 15:35:54 -04:00

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/*-------------------------------------------------------------------------
*
* alter.c
* Drivers for generic alter commands
*
* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/commands/alter.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/htup_details.h"
#include "access/sysattr.h"
#include "catalog/dependency.h"
#include "catalog/indexing.h"
#include "catalog/namespace.h"
#include "catalog/objectaccess.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_conversion.h"
#include "catalog/pg_event_trigger.h"
#include "catalog/pg_foreign_data_wrapper.h"
#include "catalog/pg_foreign_server.h"
#include "catalog/pg_language.h"
#include "catalog/pg_largeobject.h"
#include "catalog/pg_largeobject_metadata.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_opfamily.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_subscription.h"
#include "catalog/pg_statistic_ext.h"
#include "catalog/pg_ts_config.h"
#include "catalog/pg_ts_dict.h"
#include "catalog/pg_ts_parser.h"
#include "catalog/pg_ts_template.h"
#include "commands/alter.h"
#include "commands/collationcmds.h"
#include "commands/conversioncmds.h"
#include "commands/dbcommands.h"
#include "commands/defrem.h"
#include "commands/event_trigger.h"
#include "commands/extension.h"
#include "commands/policy.h"
#include "commands/proclang.h"
#include "commands/publicationcmds.h"
#include "commands/schemacmds.h"
#include "commands/subscriptioncmds.h"
#include "commands/tablecmds.h"
#include "commands/tablespace.h"
#include "commands/trigger.h"
#include "commands/typecmds.h"
#include "commands/user.h"
#include "parser/parse_func.h"
#include "miscadmin.h"
#include "rewrite/rewriteDefine.h"
#include "tcop/utility.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/syscache.h"
#include "utils/tqual.h"
static Oid AlterObjectNamespace_internal(Relation rel, Oid objid, Oid nspOid);
/*
* Raise an error to the effect that an object of the given name is already
* present in the given namespace.
*/
static void
report_name_conflict(Oid classId, const char *name)
{
char *msgfmt;
switch (classId)
{
case EventTriggerRelationId:
msgfmt = gettext_noop("event trigger \"%s\" already exists");
break;
case ForeignDataWrapperRelationId:
msgfmt = gettext_noop("foreign-data wrapper \"%s\" already exists");
break;
case ForeignServerRelationId:
msgfmt = gettext_noop("server \"%s\" already exists");
break;
case LanguageRelationId:
msgfmt = gettext_noop("language \"%s\" already exists");
break;
case PublicationRelationId:
msgfmt = gettext_noop("publication \"%s\" already exists");
break;
case SubscriptionRelationId:
msgfmt = gettext_noop("subscription \"%s\" already exists");
break;
default:
elog(ERROR, "unsupported object class %u", classId);
break;
}
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg(msgfmt, name)));
}
static void
report_namespace_conflict(Oid classId, const char *name, Oid nspOid)
{
char *msgfmt;
Assert(OidIsValid(nspOid));
switch (classId)
{
case ConversionRelationId:
Assert(OidIsValid(nspOid));
msgfmt = gettext_noop("conversion \"%s\" already exists in schema \"%s\"");
break;
case StatisticExtRelationId:
Assert(OidIsValid(nspOid));
msgfmt = gettext_noop("statistics object \"%s\" already exists in schema \"%s\"");
break;
case TSParserRelationId:
Assert(OidIsValid(nspOid));
msgfmt = gettext_noop("text search parser \"%s\" already exists in schema \"%s\"");
break;
case TSDictionaryRelationId:
Assert(OidIsValid(nspOid));
msgfmt = gettext_noop("text search dictionary \"%s\" already exists in schema \"%s\"");
break;
case TSTemplateRelationId:
Assert(OidIsValid(nspOid));
msgfmt = gettext_noop("text search template \"%s\" already exists in schema \"%s\"");
break;
case TSConfigRelationId:
Assert(OidIsValid(nspOid));
msgfmt = gettext_noop("text search configuration \"%s\" already exists in schema \"%s\"");
break;
default:
elog(ERROR, "unsupported object class %u", classId);
break;
}
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg(msgfmt, name, get_namespace_name(nspOid))));
}
/*
* AlterObjectRename_internal
*
* Generic function to rename the given object, for simple cases (won't
* work for tables, nor other cases where we need to do more than change
* the name column of a single catalog entry).
*
* rel: catalog relation containing object (RowExclusiveLock'd by caller)
* objectId: OID of object to be renamed
* new_name: CString representation of new name
*/
static void
AlterObjectRename_internal(Relation rel, Oid objectId, const char *new_name)
{
Oid classId = RelationGetRelid(rel);
int oidCacheId = get_object_catcache_oid(classId);
int nameCacheId = get_object_catcache_name(classId);
AttrNumber Anum_name = get_object_attnum_name(classId);
AttrNumber Anum_namespace = get_object_attnum_namespace(classId);
AttrNumber Anum_owner = get_object_attnum_owner(classId);
AclObjectKind acl_kind = get_object_aclkind(classId);
HeapTuple oldtup;
HeapTuple newtup;
Datum datum;
bool isnull;
Oid namespaceId;
Oid ownerId;
char *old_name;
AclResult aclresult;
Datum *values;
bool *nulls;
bool *replaces;
NameData nameattrdata;
oldtup = SearchSysCache1(oidCacheId, ObjectIdGetDatum(objectId));
if (!HeapTupleIsValid(oldtup))
elog(ERROR, "cache lookup failed for object %u of catalog \"%s\"",
objectId, RelationGetRelationName(rel));
datum = heap_getattr(oldtup, Anum_name,
RelationGetDescr(rel), &isnull);
Assert(!isnull);
old_name = NameStr(*(DatumGetName(datum)));
/* Get OID of namespace */
if (Anum_namespace > 0)
{
datum = heap_getattr(oldtup, Anum_namespace,
RelationGetDescr(rel), &isnull);
Assert(!isnull);
namespaceId = DatumGetObjectId(datum);
}
else
namespaceId = InvalidOid;
/* Permission checks ... superusers can always do it */
if (!superuser())
{
/* Fail if object does not have an explicit owner */
if (Anum_owner <= 0)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be superuser to rename %s",
getObjectDescriptionOids(classId, objectId)))));
/* Otherwise, must be owner of the existing object */
datum = heap_getattr(oldtup, Anum_owner,
RelationGetDescr(rel), &isnull);
Assert(!isnull);
ownerId = DatumGetObjectId(datum);
if (!has_privs_of_role(GetUserId(), DatumGetObjectId(ownerId)))
aclcheck_error(ACLCHECK_NOT_OWNER, acl_kind, old_name);
/* User must have CREATE privilege on the namespace */
if (OidIsValid(namespaceId))
{
aclresult = pg_namespace_aclcheck(namespaceId, GetUserId(),
ACL_CREATE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
get_namespace_name(namespaceId));
}
}
/*
* Check for duplicate name (more friendly than unique-index failure).
* Since this is just a friendliness check, we can just skip it in cases
* where there isn't suitable support.
*/
if (classId == ProcedureRelationId)
{
Form_pg_proc proc = (Form_pg_proc) GETSTRUCT(oldtup);
IsThereFunctionInNamespace(new_name, proc->pronargs,
&proc->proargtypes, proc->pronamespace);
}
else if (classId == CollationRelationId)
{
Form_pg_collation coll = (Form_pg_collation) GETSTRUCT(oldtup);
IsThereCollationInNamespace(new_name, coll->collnamespace);
}
else if (classId == OperatorClassRelationId)
{
Form_pg_opclass opc = (Form_pg_opclass) GETSTRUCT(oldtup);
IsThereOpClassInNamespace(new_name, opc->opcmethod,
opc->opcnamespace);
}
else if (classId == OperatorFamilyRelationId)
{
Form_pg_opfamily opf = (Form_pg_opfamily) GETSTRUCT(oldtup);
IsThereOpFamilyInNamespace(new_name, opf->opfmethod,
opf->opfnamespace);
}
else if (classId == SubscriptionRelationId)
{
if (SearchSysCacheExists2(SUBSCRIPTIONNAME, MyDatabaseId,
CStringGetDatum(new_name)))
report_name_conflict(classId, new_name);
}
else if (nameCacheId >= 0)
{
if (OidIsValid(namespaceId))
{
if (SearchSysCacheExists2(nameCacheId,
CStringGetDatum(new_name),
ObjectIdGetDatum(namespaceId)))
report_namespace_conflict(classId, new_name, namespaceId);
}
else
{
if (SearchSysCacheExists1(nameCacheId,
CStringGetDatum(new_name)))
report_name_conflict(classId, new_name);
}
}
/* Build modified tuple */
values = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(Datum));
nulls = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
replaces = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
namestrcpy(&nameattrdata, new_name);
values[Anum_name - 1] = NameGetDatum(&nameattrdata);
replaces[Anum_name - 1] = true;
newtup = heap_modify_tuple(oldtup, RelationGetDescr(rel),
values, nulls, replaces);
/* Perform actual update */
CatalogTupleUpdate(rel, &oldtup->t_self, newtup);
InvokeObjectPostAlterHook(classId, objectId, 0);
/* Release memory */
pfree(values);
pfree(nulls);
pfree(replaces);
heap_freetuple(newtup);
ReleaseSysCache(oldtup);
}
/*
* Executes an ALTER OBJECT / RENAME TO statement. Based on the object
* type, the function appropriate to that type is executed.
*
* Return value is the address of the renamed object.
*/
ObjectAddress
ExecRenameStmt(RenameStmt *stmt)
{
switch (stmt->renameType)
{
case OBJECT_TABCONSTRAINT:
case OBJECT_DOMCONSTRAINT:
return RenameConstraint(stmt);
case OBJECT_DATABASE:
return RenameDatabase(stmt->subname, stmt->newname);
case OBJECT_ROLE:
return RenameRole(stmt->subname, stmt->newname);
case OBJECT_SCHEMA:
return RenameSchema(stmt->subname, stmt->newname);
case OBJECT_TABLESPACE:
return RenameTableSpace(stmt->subname, stmt->newname);
case OBJECT_TABLE:
case OBJECT_SEQUENCE:
case OBJECT_VIEW:
case OBJECT_MATVIEW:
case OBJECT_INDEX:
case OBJECT_FOREIGN_TABLE:
return RenameRelation(stmt);
case OBJECT_COLUMN:
case OBJECT_ATTRIBUTE:
return renameatt(stmt);
case OBJECT_RULE:
return RenameRewriteRule(stmt->relation, stmt->subname,
stmt->newname);
case OBJECT_TRIGGER:
return renametrig(stmt);
case OBJECT_POLICY:
return rename_policy(stmt);
case OBJECT_DOMAIN:
case OBJECT_TYPE:
return RenameType(stmt);
case OBJECT_AGGREGATE:
case OBJECT_COLLATION:
case OBJECT_CONVERSION:
case OBJECT_EVENT_TRIGGER:
case OBJECT_FDW:
case OBJECT_FOREIGN_SERVER:
case OBJECT_FUNCTION:
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
case OBJECT_LANGUAGE:
case OBJECT_STATISTIC_EXT:
case OBJECT_TSCONFIGURATION:
case OBJECT_TSDICTIONARY:
case OBJECT_TSPARSER:
case OBJECT_TSTEMPLATE:
case OBJECT_PUBLICATION:
case OBJECT_SUBSCRIPTION:
{
ObjectAddress address;
Relation catalog;
Relation relation;
address = get_object_address(stmt->renameType,
stmt->object,
&relation,
AccessExclusiveLock, false);
Assert(relation == NULL);
catalog = heap_open(address.classId, RowExclusiveLock);
AlterObjectRename_internal(catalog,
address.objectId,
stmt->newname);
heap_close(catalog, RowExclusiveLock);
return address;
}
default:
elog(ERROR, "unrecognized rename stmt type: %d",
(int) stmt->renameType);
return InvalidObjectAddress; /* keep compiler happy */
}
}
/*
* Executes an ALTER OBJECT / DEPENDS ON [EXTENSION] statement.
*
* Return value is the address of the altered object. refAddress is an output
* argument which, if not null, receives the address of the object that the
* altered object now depends on.
*/
ObjectAddress
ExecAlterObjectDependsStmt(AlterObjectDependsStmt *stmt, ObjectAddress *refAddress)
{
ObjectAddress address;
ObjectAddress refAddr;
Relation rel;
address =
get_object_address_rv(stmt->objectType, stmt->relation, (List *) stmt->object,
&rel, AccessExclusiveLock, false);
/*
* If a relation was involved, it would have been opened and locked. We
* don't need the relation here, but we'll retain the lock until commit.
*/
if (rel)
heap_close(rel, NoLock);
refAddr = get_object_address(OBJECT_EXTENSION, (Node *) stmt->extname,
&rel, AccessExclusiveLock, false);
Assert(rel == NULL);
if (refAddress)
*refAddress = refAddr;
recordDependencyOn(&address, &refAddr, DEPENDENCY_AUTO_EXTENSION);
return address;
}
/*
* Executes an ALTER OBJECT / SET SCHEMA statement. Based on the object
* type, the function appropriate to that type is executed.
*
* Return value is that of the altered object.
*
* oldSchemaAddr is an output argument which, if not NULL, is set to the object
* address of the original schema.
*/
ObjectAddress
ExecAlterObjectSchemaStmt(AlterObjectSchemaStmt *stmt,
ObjectAddress *oldSchemaAddr)
{
ObjectAddress address;
Oid oldNspOid;
switch (stmt->objectType)
{
case OBJECT_EXTENSION:
address = AlterExtensionNamespace(strVal((Value *) stmt->object), stmt->newschema,
oldSchemaAddr ? &oldNspOid : NULL);
break;
case OBJECT_FOREIGN_TABLE:
case OBJECT_SEQUENCE:
case OBJECT_TABLE:
case OBJECT_VIEW:
case OBJECT_MATVIEW:
address = AlterTableNamespace(stmt,
oldSchemaAddr ? &oldNspOid : NULL);
break;
case OBJECT_DOMAIN:
case OBJECT_TYPE:
address = AlterTypeNamespace(castNode(List, stmt->object), stmt->newschema,
stmt->objectType,
oldSchemaAddr ? &oldNspOid : NULL);
break;
/* generic code path */
case OBJECT_AGGREGATE:
case OBJECT_COLLATION:
case OBJECT_CONVERSION:
case OBJECT_FUNCTION:
case OBJECT_OPERATOR:
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
case OBJECT_STATISTIC_EXT:
case OBJECT_TSCONFIGURATION:
case OBJECT_TSDICTIONARY:
case OBJECT_TSPARSER:
case OBJECT_TSTEMPLATE:
{
Relation catalog;
Relation relation;
Oid classId;
Oid nspOid;
address = get_object_address(stmt->objectType,
stmt->object,
&relation,
AccessExclusiveLock,
false);
Assert(relation == NULL);
classId = address.classId;
catalog = heap_open(classId, RowExclusiveLock);
nspOid = LookupCreationNamespace(stmt->newschema);
oldNspOid = AlterObjectNamespace_internal(catalog, address.objectId,
nspOid);
heap_close(catalog, RowExclusiveLock);
}
break;
default:
elog(ERROR, "unrecognized AlterObjectSchemaStmt type: %d",
(int) stmt->objectType);
return InvalidObjectAddress; /* keep compiler happy */
}
if (oldSchemaAddr)
ObjectAddressSet(*oldSchemaAddr, NamespaceRelationId, oldNspOid);
return address;
}
/*
* Change an object's namespace given its classOid and object Oid.
*
* Objects that don't have a namespace should be ignored.
*
* This function is currently used only by ALTER EXTENSION SET SCHEMA,
* so it only needs to cover object types that can be members of an
* extension, and it doesn't have to deal with certain special cases
* such as not wanting to process array types --- those should never
* be direct members of an extension anyway. Nonetheless, we insist
* on listing all OCLASS types in the switch.
*
* Returns the OID of the object's previous namespace, or InvalidOid if
* object doesn't have a schema.
*/
Oid
AlterObjectNamespace_oid(Oid classId, Oid objid, Oid nspOid,
ObjectAddresses *objsMoved)
{
Oid oldNspOid = InvalidOid;
ObjectAddress dep;
dep.classId = classId;
dep.objectId = objid;
dep.objectSubId = 0;
switch (getObjectClass(&dep))
{
case OCLASS_CLASS:
{
Relation rel;
rel = relation_open(objid, AccessExclusiveLock);
oldNspOid = RelationGetNamespace(rel);
AlterTableNamespaceInternal(rel, oldNspOid, nspOid, objsMoved);
relation_close(rel, NoLock);
break;
}
case OCLASS_TYPE:
oldNspOid = AlterTypeNamespace_oid(objid, nspOid, objsMoved);
break;
case OCLASS_PROC:
case OCLASS_COLLATION:
case OCLASS_CONVERSION:
case OCLASS_OPERATOR:
case OCLASS_OPCLASS:
case OCLASS_OPFAMILY:
case OCLASS_STATISTIC_EXT:
case OCLASS_TSPARSER:
case OCLASS_TSDICT:
case OCLASS_TSTEMPLATE:
case OCLASS_TSCONFIG:
{
Relation catalog;
catalog = heap_open(classId, RowExclusiveLock);
oldNspOid = AlterObjectNamespace_internal(catalog, objid,
nspOid);
heap_close(catalog, RowExclusiveLock);
}
break;
case OCLASS_CAST:
case OCLASS_CONSTRAINT:
case OCLASS_DEFAULT:
case OCLASS_LANGUAGE:
case OCLASS_LARGEOBJECT:
case OCLASS_AM:
case OCLASS_AMOP:
case OCLASS_AMPROC:
case OCLASS_REWRITE:
case OCLASS_TRIGGER:
case OCLASS_SCHEMA:
case OCLASS_ROLE:
case OCLASS_DATABASE:
case OCLASS_TBLSPACE:
case OCLASS_FDW:
case OCLASS_FOREIGN_SERVER:
case OCLASS_USER_MAPPING:
case OCLASS_DEFACL:
case OCLASS_EXTENSION:
case OCLASS_EVENT_TRIGGER:
case OCLASS_POLICY:
case OCLASS_PUBLICATION:
case OCLASS_PUBLICATION_REL:
case OCLASS_SUBSCRIPTION:
case OCLASS_TRANSFORM:
/* ignore object types that don't have schema-qualified names */
break;
/*
* There's intentionally no default: case here; we want the
* compiler to warn if a new OCLASS hasn't been handled above.
*/
}
return oldNspOid;
}
/*
* Generic function to change the namespace of a given object, for simple
* cases (won't work for tables, nor other cases where we need to do more
* than change the namespace column of a single catalog entry).
*
* rel: catalog relation containing object (RowExclusiveLock'd by caller)
* objid: OID of object to change the namespace of
* nspOid: OID of new namespace
*
* Returns the OID of the object's previous namespace.
*/
static Oid
AlterObjectNamespace_internal(Relation rel, Oid objid, Oid nspOid)
{
Oid classId = RelationGetRelid(rel);
int oidCacheId = get_object_catcache_oid(classId);
int nameCacheId = get_object_catcache_name(classId);
AttrNumber Anum_name = get_object_attnum_name(classId);
AttrNumber Anum_namespace = get_object_attnum_namespace(classId);
AttrNumber Anum_owner = get_object_attnum_owner(classId);
AclObjectKind acl_kind = get_object_aclkind(classId);
Oid oldNspOid;
Datum name,
namespace;
bool isnull;
HeapTuple tup,
newtup;
Datum *values;
bool *nulls;
bool *replaces;
tup = SearchSysCacheCopy1(oidCacheId, ObjectIdGetDatum(objid));
if (!HeapTupleIsValid(tup)) /* should not happen */
elog(ERROR, "cache lookup failed for object %u of catalog \"%s\"",
objid, RelationGetRelationName(rel));
name = heap_getattr(tup, Anum_name, RelationGetDescr(rel), &isnull);
Assert(!isnull);
namespace = heap_getattr(tup, Anum_namespace, RelationGetDescr(rel),
&isnull);
Assert(!isnull);
oldNspOid = DatumGetObjectId(namespace);
/*
* If the object is already in the correct namespace, we don't need to do
* anything except fire the object access hook.
*/
if (oldNspOid == nspOid)
{
InvokeObjectPostAlterHook(classId, objid, 0);
return oldNspOid;
}
/* Check basic namespace related issues */
CheckSetNamespace(oldNspOid, nspOid);
/* Permission checks ... superusers can always do it */
if (!superuser())
{
Datum owner;
Oid ownerId;
AclResult aclresult;
/* Fail if object does not have an explicit owner */
if (Anum_owner <= 0)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be superuser to set schema of %s",
getObjectDescriptionOids(classId, objid)))));
/* Otherwise, must be owner of the existing object */
owner = heap_getattr(tup, Anum_owner, RelationGetDescr(rel), &isnull);
Assert(!isnull);
ownerId = DatumGetObjectId(owner);
if (!has_privs_of_role(GetUserId(), ownerId))
aclcheck_error(ACLCHECK_NOT_OWNER, acl_kind,
NameStr(*(DatumGetName(name))));
/* User must have CREATE privilege on new namespace */
aclresult = pg_namespace_aclcheck(nspOid, GetUserId(), ACL_CREATE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
get_namespace_name(nspOid));
}
/*
* Check for duplicate name (more friendly than unique-index failure).
* Since this is just a friendliness check, we can just skip it in cases
* where there isn't suitable support.
*/
if (classId == ProcedureRelationId)
{
Form_pg_proc proc = (Form_pg_proc) GETSTRUCT(tup);
IsThereFunctionInNamespace(NameStr(proc->proname), proc->pronargs,
&proc->proargtypes, nspOid);
}
else if (classId == CollationRelationId)
{
Form_pg_collation coll = (Form_pg_collation) GETSTRUCT(tup);
IsThereCollationInNamespace(NameStr(coll->collname), nspOid);
}
else if (classId == OperatorClassRelationId)
{
Form_pg_opclass opc = (Form_pg_opclass) GETSTRUCT(tup);
IsThereOpClassInNamespace(NameStr(opc->opcname),
opc->opcmethod, nspOid);
}
else if (classId == OperatorFamilyRelationId)
{
Form_pg_opfamily opf = (Form_pg_opfamily) GETSTRUCT(tup);
IsThereOpFamilyInNamespace(NameStr(opf->opfname),
opf->opfmethod, nspOid);
}
else if (nameCacheId >= 0 &&
SearchSysCacheExists2(nameCacheId, name,
ObjectIdGetDatum(nspOid)))
report_namespace_conflict(classId,
NameStr(*(DatumGetName(name))),
nspOid);
/* Build modified tuple */
values = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(Datum));
nulls = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
replaces = palloc0(RelationGetNumberOfAttributes(rel) * sizeof(bool));
values[Anum_namespace - 1] = ObjectIdGetDatum(nspOid);
replaces[Anum_namespace - 1] = true;
newtup = heap_modify_tuple(tup, RelationGetDescr(rel),
values, nulls, replaces);
/* Perform actual update */
CatalogTupleUpdate(rel, &tup->t_self, newtup);
/* Release memory */
pfree(values);
pfree(nulls);
pfree(replaces);
/* update dependencies to point to the new schema */
changeDependencyFor(classId, objid,
NamespaceRelationId, oldNspOid, nspOid);
InvokeObjectPostAlterHook(classId, objid, 0);
return oldNspOid;
}
/*
* Executes an ALTER OBJECT / OWNER TO statement. Based on the object
* type, the function appropriate to that type is executed.
*/
ObjectAddress
ExecAlterOwnerStmt(AlterOwnerStmt *stmt)
{
Oid newowner = get_rolespec_oid(stmt->newowner, false);
switch (stmt->objectType)
{
case OBJECT_DATABASE:
return AlterDatabaseOwner(strVal((Value *) stmt->object), newowner);
case OBJECT_SCHEMA:
return AlterSchemaOwner(strVal((Value *) stmt->object), newowner);
case OBJECT_TYPE:
case OBJECT_DOMAIN: /* same as TYPE */
return AlterTypeOwner(castNode(List, stmt->object), newowner, stmt->objectType);
break;
case OBJECT_FDW:
return AlterForeignDataWrapperOwner(strVal((Value *) stmt->object),
newowner);
case OBJECT_FOREIGN_SERVER:
return AlterForeignServerOwner(strVal((Value *) stmt->object),
newowner);
case OBJECT_EVENT_TRIGGER:
return AlterEventTriggerOwner(strVal((Value *) stmt->object),
newowner);
case OBJECT_PUBLICATION:
return AlterPublicationOwner(strVal((Value *) stmt->object),
newowner);
case OBJECT_SUBSCRIPTION:
return AlterSubscriptionOwner(strVal((Value *) stmt->object),
newowner);
/* Generic cases */
case OBJECT_AGGREGATE:
case OBJECT_COLLATION:
case OBJECT_CONVERSION:
case OBJECT_FUNCTION:
case OBJECT_LANGUAGE:
case OBJECT_LARGEOBJECT:
case OBJECT_OPERATOR:
case OBJECT_OPCLASS:
case OBJECT_OPFAMILY:
case OBJECT_STATISTIC_EXT:
case OBJECT_TABLESPACE:
case OBJECT_TSDICTIONARY:
case OBJECT_TSCONFIGURATION:
{
Relation catalog;
Relation relation;
Oid classId;
ObjectAddress address;
address = get_object_address(stmt->objectType,
stmt->object,
&relation,
AccessExclusiveLock,
false);
Assert(relation == NULL);
classId = address.classId;
/*
* XXX - get_object_address returns Oid of pg_largeobject
* catalog for OBJECT_LARGEOBJECT because of historical
* reasons. Fix up it here.
*/
if (classId == LargeObjectRelationId)
classId = LargeObjectMetadataRelationId;
catalog = heap_open(classId, RowExclusiveLock);
AlterObjectOwner_internal(catalog, address.objectId, newowner);
heap_close(catalog, RowExclusiveLock);
return address;
}
break;
default:
elog(ERROR, "unrecognized AlterOwnerStmt type: %d",
(int) stmt->objectType);
return InvalidObjectAddress; /* keep compiler happy */
}
}
/*
* Generic function to change the ownership of a given object, for simple
* cases (won't work for tables, nor other cases where we need to do more than
* change the ownership column of a single catalog entry).
*
* rel: catalog relation containing object (RowExclusiveLock'd by caller)
* objectId: OID of object to change the ownership of
* new_ownerId: OID of new object owner
*/
void
AlterObjectOwner_internal(Relation rel, Oid objectId, Oid new_ownerId)
{
Oid classId = RelationGetRelid(rel);
AttrNumber Anum_owner = get_object_attnum_owner(classId);
AttrNumber Anum_namespace = get_object_attnum_namespace(classId);
AttrNumber Anum_acl = get_object_attnum_acl(classId);
AttrNumber Anum_name = get_object_attnum_name(classId);
HeapTuple oldtup;
Datum datum;
bool isnull;
Oid old_ownerId;
Oid namespaceId = InvalidOid;
oldtup = get_catalog_object_by_oid(rel, objectId);
if (oldtup == NULL)
elog(ERROR, "cache lookup failed for object %u of catalog \"%s\"",
objectId, RelationGetRelationName(rel));
datum = heap_getattr(oldtup, Anum_owner,
RelationGetDescr(rel), &isnull);
Assert(!isnull);
old_ownerId = DatumGetObjectId(datum);
if (Anum_namespace != InvalidAttrNumber)
{
datum = heap_getattr(oldtup, Anum_namespace,
RelationGetDescr(rel), &isnull);
Assert(!isnull);
namespaceId = DatumGetObjectId(datum);
}
if (old_ownerId != new_ownerId)
{
AttrNumber nattrs;
HeapTuple newtup;
Datum *values;
bool *nulls;
bool *replaces;
/* Superusers can bypass permission checks */
if (!superuser())
{
AclObjectKind aclkind = get_object_aclkind(classId);
/* must be owner */
if (!has_privs_of_role(GetUserId(), old_ownerId))
{
char *objname;
char namebuf[NAMEDATALEN];
if (Anum_name != InvalidAttrNumber)
{
datum = heap_getattr(oldtup, Anum_name,
RelationGetDescr(rel), &isnull);
Assert(!isnull);
objname = NameStr(*DatumGetName(datum));
}
else
{
snprintf(namebuf, sizeof(namebuf), "%u",
HeapTupleGetOid(oldtup));
objname = namebuf;
}
aclcheck_error(ACLCHECK_NOT_OWNER, aclkind, objname);
}
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), new_ownerId);
/* New owner must have CREATE privilege on namespace */
if (OidIsValid(namespaceId))
{
AclResult aclresult;
aclresult = pg_namespace_aclcheck(namespaceId, new_ownerId,
ACL_CREATE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
get_namespace_name(namespaceId));
}
}
/* Build a modified tuple */
nattrs = RelationGetNumberOfAttributes(rel);
values = palloc0(nattrs * sizeof(Datum));
nulls = palloc0(nattrs * sizeof(bool));
replaces = palloc0(nattrs * sizeof(bool));
values[Anum_owner - 1] = ObjectIdGetDatum(new_ownerId);
replaces[Anum_owner - 1] = true;
/*
* Determine the modified ACL for the new owner. This is only
* necessary when the ACL is non-null.
*/
if (Anum_acl != InvalidAttrNumber)
{
datum = heap_getattr(oldtup,
Anum_acl, RelationGetDescr(rel), &isnull);
if (!isnull)
{
Acl *newAcl;
newAcl = aclnewowner(DatumGetAclP(datum),
old_ownerId, new_ownerId);
values[Anum_acl - 1] = PointerGetDatum(newAcl);
replaces[Anum_acl - 1] = true;
}
}
newtup = heap_modify_tuple(oldtup, RelationGetDescr(rel),
values, nulls, replaces);
/* Perform actual update */
CatalogTupleUpdate(rel, &newtup->t_self, newtup);
/* Update owner dependency reference */
if (classId == LargeObjectMetadataRelationId)
classId = LargeObjectRelationId;
changeDependencyOnOwner(classId, HeapTupleGetOid(newtup), new_ownerId);
/* Release memory */
pfree(values);
pfree(nulls);
pfree(replaces);
}
InvokeObjectPostAlterHook(classId, objectId, 0);
}
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