SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function visitParamExtractString (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'{"x":"\\\\uD800\\\\udf38"}\'
      Literal \'x\'
    Function visitParamExtractString (alias y) (children 1)
     ExpressionList (children 2)
      Literal \'{"x":"Hello \\\\u2028 World \\\\u2029 !"}\'
      Literal \'x\'
 Identifier JSONEachRow
