[I] [FIP-28] Support point lookup for historical partitions [fluss]

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

luoyuxia opened a new issue, #3632:
URL: https://github.com/apache/fluss/issues/3632

   ### Search before asking
   
   - [x] I searched in the [issues](https://github.com/apache/fluss/issues) and found nothing similar.
   
   ### Description
   
   Parent issue: #3631
   
   Support point lookup for historical partitions of datalake-enabled primary key tables. When a lookup targets an expired Fluss partition whose data has been tiered to lake storage, the client/server path should resolve the historical partition and read the matching row from the lake table instead of failing with partition-not-found behavior.
   
   The implementation should cover:
   
   - Client lookup request plumbing for carrying the original partition name when the active Fluss partition no longer exists.
   - Server-side routing that distinguishes normal lookup from historical partition lookup.
   - A lake lookup SPI and Paimon implementation for point lookup by primary key.
   - Schema evolution behavior when old lake data is returned through the current Fluss table schema.
   - Flow control for historical lake lookup so it cannot exhaust normal lookup resources.
   - Unit and integration coverage for normal lookup, historical lookup, mixed routing, Paimon lookup, and schema evolution.
   
   Related PR: #3630
   
   ### Willingness to contribute
   
   - [x] I'm willing to submit a PR!
   


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Re: [I] [FIP-28] Support point lookup for historical partitions [fluss]

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

wuchong closed issue #3632: [FIP-28] Support point lookup for historical partitions
URL: https://github.com/apache/fluss/issues/3632


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