Implement DROP OWNED and REASSIGN OWNED. These new commands facilitate the

process of dropping roles by dropping objects owned by them and privileges
granted to them, or giving the owned objects to someone else, through the
use of the data stored in the new pg_shdepend catalog.

Some refactoring of the GRANT/REVOKE code was needed, as well as ALTER OWNER
code.  Further cleanup of code duplication in the GRANT code seems necessary.

Implemented by me after an idea from Tom Lane, who also provided various kind
of implementation advice.

Regression tests pass.  Some tests for the new functionality are also added,
as well as rudimentary documentation.

src/include/commands/conversioncmds.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/commands/conversioncmds.h,v 1.11 2005/11/19 17:39:45 adunstan Exp $
+ * $PostgreSQL: pgsql/src/include/commands/conversioncmds.h,v 1.12 2005/11/21 12:49:32 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -22,5 +22,6 @@ extern void DropConversionCommand(List *conversion_name,
 								  DropBehavior behavior, bool missing_ok);
 extern void RenameConversion(List *name, const char *newname);
 extern void AlterConversionOwner(List *name, Oid newOwnerId);
+extern void AlterConversionOwner_oid(Oid conversionOid, Oid newOwnerId);
 
 #endif   /* CONVERSIONCMDS_H */

src/include/commands/defrem.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/commands/defrem.h,v 1.68 2005/10/15 02:49:44 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/commands/defrem.h,v 1.69 2005/11/21 12:49:32 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -51,6 +51,7 @@ extern void SetFunctionReturnType(Oid funcOid, Oid newRetType);
 extern void SetFunctionArgType(Oid funcOid, int argIndex, Oid newArgType);
 extern void RenameFunction(List *name, List *argtypes, const char *newname);
 extern void AlterFunctionOwner(List *name, List *argtypes, Oid newOwnerId);
+extern void AlterFunctionOwner_oid(Oid procOid, Oid newOwnerId);
 extern void AlterFunction(AlterFunctionStmt *stmt);
 extern void CreateCast(CreateCastStmt *stmt);
 extern void DropCast(DropCastStmt *stmt);
@@ -64,6 +65,7 @@ extern void RemoveOperator(RemoveOperStmt *stmt);
 extern void RemoveOperatorById(Oid operOid);
 extern void AlterOperatorOwner(List *name, TypeName *typeName1,
 				   TypeName *typename2, Oid newOwnerId);
+extern void AlterOperatorOwner_oid(Oid operOid, Oid newOwnerId);
 
 /* commands/aggregatecmds.c */
 extern void DefineAggregate(List *names, List *parameters);
@@ -77,6 +79,7 @@ extern void RemoveOpClass(RemoveOpClassStmt *stmt);
 extern void RemoveOpClassById(Oid opclassOid);
 extern void RenameOpClass(List *name, const char *access_method, const char *newname);
 extern void AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId);
+extern void AlterOpClassOwner_oid(Oid opcOid, Oid newOwnerId);
 
 /* support routines in commands/define.c */
 

src/include/commands/schemacmds.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/commands/schemacmds.h,v 1.11 2005/11/19 17:39:45 adunstan Exp $
+ * $PostgreSQL: pgsql/src/include/commands/schemacmds.h,v 1.12 2005/11/21 12:49:32 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -24,5 +24,6 @@ extern void RemoveSchemaById(Oid schemaOid);
 
 extern void RenameSchema(const char *oldname, const char *newname);
 extern void AlterSchemaOwner(const char *name, Oid newOwnerId);
+extern void AlterSchemaOwner_oid(const Oid schemaOid, Oid newOwnerId);
 
 #endif   /* SCHEMACMDS_H */

src/include/commands/tablecmds.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/commands/tablecmds.h,v 1.24 2005/10/15 02:49:44 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/commands/tablecmds.h,v 1.25 2005/11/21 12:49:32 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -24,6 +24,8 @@ extern void RemoveRelation(const RangeVar *relation, DropBehavior behavior);
 
 extern void AlterTable(AlterTableStmt *stmt);
 
+extern void ATExecChangeOwner(Oid relationOid, Oid newOwnerId, bool recursing);
+
 extern void AlterTableInternal(Oid relid, List *cmds, bool recurse);
 
 extern void AlterTableCreateToastTable(Oid relOid, bool silent);

src/include/commands/user.h

@@ -4,7 +4,7 @@
  *	  Commands for manipulating roles (formerly called users).
  *
  *
- * $PostgreSQL: pgsql/src/include/commands/user.h,v 1.27 2005/06/28 05:09:12 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/commands/user.h,v 1.28 2005/11/21 12:49:32 alvherre Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -20,5 +20,7 @@ extern void AlterRoleSet(AlterRoleSetStmt *stmt);
 extern void DropRole(DropRoleStmt *stmt);
 extern void GrantRole(GrantRoleStmt *stmt);
 extern void RenameRole(const char *oldname, const char *newname);
+extern void DropOwnedObjects(DropOwnedStmt *stmt);
+extern void ReassignOwnedObjects(ReassignOwnedStmt *stmt);
 
 #endif   /* USER_H */