nsivabalan opened a new pull request #4334:
URL: https://github.com/apache/hudi/pull/4334
## What is the purpose of the pull request
- HoodieIncremental source is used to read incrementally from a hudi table.
When a deltastreamer is started to consume from source table and no checkpoint
is provided, by setting.
"hoodie.deltastreamer.source.hoodieincr.read_latest_on_missing_ckpt", we can
enforce reading from latest commit. but htis means that incremental consumption
will consume just the records ingested in the latest commit and not other
records. But likely we might want to consume entire table in the first batch
and then start to consume incrementally.
So, introducing a new config named
`hoodie.deltastreamer.source.hoodieincr.missing.checkpoint.strategy` which can
accept two values, READ_LATEST and READ_EVERYTHING_UNTIL_LATEST. READ_LATEST
will fallback to same behavior when users sets
"hoodie.deltastreamer.source.hoodieincr.read_latest_on_missing_ckpt". But when
a user sets "READ_EVERYTHING_UNTIL_LATEST", entire dataset is consumed on first
batch when checkpoint is missing.
Also, have deprecated the old config
"hoodie.deltastreamer.source.hoodieincr.read_latest_on_missing_ckpt".
## Brief change log
*(for example:)*
- *Modify AnnotationLocation checkstyle rule in checkstyle.xml*
## Verify this pull request
This change added tests and can be verified as follows:
Added TestHoodieIncrSource to test the added functionality.
## Committer checklist
- [ ] Has a corresponding JIRA in PR title & commit
- [ ] Commit message is descriptive of the change
- [ ] CI is green
- [ ] Necessary doc changes done or have another open PR
- [ ] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
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