ALTER TABLESPACE ... MOVE ... OWNED BY

Add the ability to specify the objects to move by who those objects are
owned by (as relowner) and change ALL to mean ALL objects.  This
makes the command always operate against a well-defined set of objects
and not have the objects-to-be-moved based on the role of the user
running the command.

Per discussion with Simon and Tom.

src/include/nodes/parsenodes.h

@@ -1691,10 +1691,11 @@ typedef struct AlterTableSpaceMoveStmt
 {
 	NodeTag		type;
 	char	   *orig_tablespacename;
+	ObjectType	objtype;		/* set to -1 if move_all is true */
+	bool		move_all;		/* move all, or just objtype objects? */
+	List	   *roles;			/* List of roles to move objects of */
 	char	   *new_tablespacename;
-	ObjectType	objtype;
 	bool		nowait;
-	bool		move_all;
 } AlterTableSpaceMoveStmt;
 
 /* ----------------------