SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function map (alias m) (children 1)
     ExpressionList (children 4)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'11\'
        Literal \'UInt64\'
      Literal \'v1\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'22\'
        Literal \'UInt64\'
      Literal \'v2\'
 Identifier JSONEachRow
