Dear Bharath,
Thanks for giving comments and apologize for late reply.
New version is available in [1].
> +1 for this approach. It looks neat.
>
> I think we also need to add TAP tests to generate decodable WAL
> records (RUNNING_XACT, CHECKPOINT_ONLINE, XLOG_FPI_FOR_HINT,
> XLOG_SWITCH, XLOG_PARAMETER_CHANGE, XLOG_HEAP2_PRUNE) during
> pg_upgrade as described here
> https://www.postgresql.org/message-id/TYAPR01MB58660273EACEFC5BF256
> B133F50DA%40TYAPR01MB5866.jpnprd01.prod.outlook.com.
> Basically, these were the exceptional WAL records that may be
> generated by pg_upgrade, so having tests for them is good.
Hmm, I'm not sure it is really good. If we add such a test, we may have to add
further tests in future if new WAL log types during upgrade is introduced.
Currently we do not have if-statement for each WAL types, so it does not improve
coverage, I thought. Another concern is that I'm not sure how do we simply and
surely generate XLOG_HEAP2_PRUNE.
Based on above, I did not add the test case for now.
[1]:
https://www.postgresql.org/message-id/TYAPR01MB5866068CB6591C8AE1F9690BF5CDA%40TYAPR01MB5866.jpnprd01.prod.outlook.com
Best Regards,
Hayato Kuroda
FUJITSU LIMITED