SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function splitByChar (children 1)
         ExpressionList (children 2)
          Function toString (children 1)
           ExpressionList (children 1)
            Identifier id
          Function arrayMap (children 1)
           ExpressionList (children 2)
            Function lambda (children 1)
             ExpressionList (children 2)
              Function tuple (children 1)
               ExpressionList (children 1)
                Identifier x
              Function toString (children 1)
               ExpressionList (children 1)
                Literal UInt64_1
            Literal Array_[NULL]
      Literal Array_[NULL]
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_table