Function ATTypedTableRecursion

src/backend/commands/tablecmds.c:8024–8047

* ATTypedTableRecursion * * Propagate ALTER TYPE operations to the typed tables of that type. * Also check the RESTRICT/CASCADE behavior. Given CASCADE, also permit * recursion to inheritance children of the typed tables. */

 * recursion to inheritance children of the typed tables.
 */
static void
ATTypedTableRecursion(List **wqueue, Relation rel, AlterTableCmd *cmd,
					  LOCKMODE lockmode, AlterTableUtilityContext *context)
{
	ListCell   *child;
	List	   *children;

	Assert(rel->rd_rel->relkind == RELKIND_COMPOSITE_TYPE);

	children = find_typed_table_dependencies(rel->rd_rel->reltype,
											 RelationGetRelationName(rel),
											 cmd->behavior);

	foreach(child, children)
	{
		Oid			childrelid = lfirst_oid(child);
		Relation	childrel;

		childrel = relation_open(childrelid, lockmode);
		CheckTableNotInUse(childrel, "ALTER TABLE");
		ATPrepCmd(wqueue, childrel, cmd, true, true, lockmode, context);
		relation_close(childrel, NoLock);
	}
}


/*