SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function visitParamExtractRaw (children 1)
     ExpressionList (children 2)
      Literal \'{"myparam": {"nested" : [1,2,3]}, "other":123}\'
      Literal \'myparam\'
