roryqi opened a new pull request, #13541:
URL: https://github.com/apache/gravitino/pull/13541

   ### What changes were proposed in this pull request?
   
   Change the relational store column comment types in the 2.0 schema and 
upgrade scripts:
   
   - H2: `CLOB`
   - MySQL: `LONGTEXT`
   - PostgreSQL: `TEXT`
   
   ### Why are the changes needed?
   
   Iceberg does not define a length limit for column documentation. Using
   `VARCHAR(4096)` still rejects valid column comments that exceed this limit.
   
   Related: #12038
   
   ### Does this PR introduce _any_ user-facing change?
   
   Yes. Column comments are no longer limited by `VARCHAR(4096)` in the 
relational
   metadata store.
   
   ### How was this patch tested?
   
   Ran the SQL schema and upgrade tests against H2, MySQL, and PostgreSQL:
   
   `dockerTest=true ./gradlew :core:test --tests 
org.apache.gravitino.storage.TestSQLScripts -PskipDockerTests=false`
   


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