Handling system tables errors

[chanukya571]

Hey All,

Sorry for delay. there is a problem with my email.

As mentioned I have reviewed the code and did some cleanup , added comments also.

As per suggestions on PR reorg#327 I have looked in both repack_one_table() and repack_table_indexes() but the ERROR: relation pg_class does not exist is coming from is_requested_relation_exists() before checking the function check_systemtables().

So I have added check_systemtables() in is_requested_relation_exists() so that it will be clear for understanding and enhance in future.

Please let me know your thoughts. once this branch is merged I will create pull request to reorg/pg_repack.

Thanks.

[chanukya571]

@za-arthur Please review this. Once this is merged I will create a Pull request from adjust/pg_repack to reorg/pg_repack.
Or let me know if I have to create pull directly from my fork with reorg/pg_repack.

Thanks