[I] [rust] append_arrow_batch accepts nulls in NOT NULL columns and fails later on scan [fluss]

["charlesdong1991 (via GitHub)" <gi...@apache.org>]

charlesdong1991 opened a new issue, #3949:
URL: https://github.com/apache/fluss/issues/3949

   ### Search before asking
   
   - [x] I searched in the [issues](https://github.com/apache/fluss/issues) and found nothing similar.
   
   
   ### Fluss version
   
   main (development)
   
   ### Please describe the bug 🐞
   
   `append_arrow_batch` can accept a caller-provided Arrow `RecordBatch` where a NOT NULL Fluss column contains null values. The write is accepted in some paths and the failure appears later during decode/scan.
   
   The client should reject invalid batches at append time, before enqueue/split/write, with a clear `IllegalArgument` error.
   
   
   ### Solution
   
   Add schema + nullability validation for caller-supplied Arrow batches at append entry, and apply the same validation in prebuilt builder path so all ingest entry points enforce identical invariant
   
   ### Are you willing to submit a PR?
   
   - [x] I'm willing to submit a PR!


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Re: [I] [rust] append_arrow_batch accepts nulls in NOT NULL columns and fails later on scan [fluss]

["fresh-borzoni (via GitHub)" <gi...@apache.org>]

fresh-borzoni closed issue #3949: [rust] append_arrow_batch accepts nulls in NOT NULL columns and fails later on scan
URL: https://github.com/apache/fluss/issues/3949


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