SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function gcd (children 1)
     ExpressionList (children 2)
      Literal UInt64_1
      Function toLowCardinality (children 1)
       ExpressionList (children 1)
        Identifier val
   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 val) (children 1)
            ExpressionList (children 1)
             Literal Array_[UInt64_1]
