DeleteQuery  t (children 3)
 Function in (children 1)
  ExpressionList (children 2)
   Identifier x
   Subquery (children 1)
    SelectWithUnionQuery (children 1)
     ExpressionList (children 1)
      SelectQuery (children 2)
       ExpressionList (children 1)
        Identifier foo
       TablesInSelectQuery (children 1)
        TablesInSelectQueryElement (children 1)
         TableExpression (children 1)
          TableIdentifier bar
 Identifier t
 Set
