AlterQuery  t (children 2)
 ExpressionList (children 1)
  AlterCommand DELETE (children 1)
   Function in (children 1)
    ExpressionList (children 2)
     Identifier id
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 2)
         ExpressionList (children 1)
          Identifier id
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            TableIdentifier t (alias tmp)
 Identifier t