anishshri-db opened a new pull request, #48148:
URL: https://github.com/apache/spark/pull/48148
### What changes were proposed in this pull request?
Add support for state variables with value state collection types and read
change feed options
### Why are the changes needed?
Without this, we cannot support reading per key changes for state variables
used with stateful processors.
### Does this PR introduce _any_ user-facing change?
Yes
Users can now query value state variables with the following query:
```
val changeFeedDf = spark.read
.format("statestore")
.option(StateSourceOptions.PATH, <checkpoint_loc>)
.option(StateSourceOptions.STATE_VAR_NAME, <state_var_name>)
.option(StateSourceOptions.READ_CHANGE_FEED, true)
.option(StateSourceOptions.CHANGE_START_BATCH_ID, 0)
.load()
```
### How was this patch tested?
Added unit tests
### Was this patch authored or co-authored using generative AI tooling?
No
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