SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 4)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier dict
    Identifier dict
    Function lowCardinalityIndices (children 1)
     ExpressionList (children 1)
      Identifier dict
    Function lowCardinalityKeys (children 1)
     ExpressionList (children 1)
      Identifier dict
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function concat (alias dict) (children 1)
            ExpressionList (children 2)
             Literal \'123_\'
             Function toLowCardinality (children 1)
              ExpressionList (children 1)
               Identifier v
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Function arrayJoin (alias v) (children 1)
                   ExpressionList (children 1)
                    Literal Array_[\'a\', NULL, \'bb\', \'\', \'a\', NULL, \'ccc\', \'a\', \'bb\', \'\', \'dddd\']