majian1998 opened a new pull request, #6683:
URL: https://github.com/apache/paimon/pull/6683

   
   <!-- Please specify the module before the PR name: [core] ... or [flink] ... 
-->
   
   ### Purpose
   
   <!-- Linking this pull request to the issue -->
   Linked issue: close #6682
   
   <!-- What is the purpose of the change -->
   `paimon-spark-4.0_2.13` is intended for Spark 4 + Scala 2.13, but its POM 
currently inherits
   `scala.binary.version` from `paimon-parent`. Since the default value in the 
parent is `2.12`,
   Maven may resolve `_2.12` Spark / Paimon Spark artifacts for this module 
when the `spark4`
   profile is not explicitly activated (both in external projects and when 
running `mvn clean install`
   under `paimon-spark-4.0`).
   
   This PR makes the Scala version for `paimon-spark-4.0_2.13` explicit and 
local to the module
   ### Tests
   
   <!-- List UT and IT cases to verify this change -->
   ```
   mvn -pl paimon-spark/paimon-spark-4.0_2.13 -DskipTests clean install
   ```
   
   From an external Spark 4 + Scala 2.13 project that depends on
   org.apache.paimon:paimon-spark-4.0_2.13, verified with:
   ```
   mvn dependency:tree -Dincludes=org.apache.paimon:paimon-spark-4.0_2.13
   ```
   that only _2.13 Spark / Paimon Spark artifacts are resolved and no _2.12 
artifacts are pulled in.
   ### API and Format
   
   <!-- Does this change affect API or storage format -->
   No API changes.
   No storage format changes.
   
   ### Documentation
   
   <!-- Does this change introduce a new feature -->
   None


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