SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function length (children 1)
     ExpressionList (children 1)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier m2
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'aaa\'
          Literal \'FixedString(4)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_map_02014