SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 3)
        Identifier JSONEachRow
        Literal \'payload Tuple(pull_request Tuple(merged_by Tuple(login Nullable(String))))\'
        Literal \'{"payload" : {"pull_request": {"merged_by": null}}}\'
   Set
