[HUDI-8342] Log warning and skip building partition stats for non partitioned table

[nsivabalan]

Change Logs

Throwing exception for partition stats instantiation for non partitioned table

Impact

Throwing exception for partition stats instantiation for non partitioned table

Risk level (write none, low medium or high below)

low

Documentation Update

Describe any necessary documentation update if there is any new feature, config, or user-facing change. If not, put "none".

• The config description must be updated if new configs are added or the default value of the configs are changed
• Any new feature or user-facing change requires updating the Hudi website. Please create a Jira ticket, attach the
  ticket number here and follow the instruction to make
  changes to the website.

Contributor's checklist

• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
• CI passed

[yihua]

Should we skip building partition stats index for non-partitioned table instead of throwing an error?

[codope]

Should we skip building partition stats index for non-partitioned table instead of throwing an error?

Since we want to keep partition stats enabled by default, I think it makes sense to log a warning and skip building instead of failing. Otherwise, many new users will try out Hudi on non-partitioned table and they will have to manually disable it.

[nsivabalan]

partition stats is not enabled by default. So, I don't see it a strong reason from usability standup.
but I am open to logging a warning and not throw an exception.

[nsivabalan]