dongjoon-hyun commented on PR #56505:
URL: https://github.com/apache/spark/pull/56505#issuecomment-4737995685

   Hi, @chenhao-db and @cloud-fan .
   
   This broke `branch-4.2`.
   
   - https://github.com/apache/spark/actions/runs/27725205574/job/82020200235
   
   ```
   [error] 
/home/runner/work/spark/spark/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/V2ScanRelationPushDown.scala:451:19:
 not found: value VariantMetadata
   [error]                   
VariantMetadata.castErrorCompanionMetadata(ordinal.toString),
   [error]                   ^
   [error] 
/home/runner/work/spark/spark/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/V2ScanRelationPushDown.scala:39:38:
 Unused import
   [error] Applicable -Wconf / @nowarn filters for this fatal warning: 
msg=<part of the message>, cat=unused-imports, 
site=org.apache.spark.sql.execution.datasources.v2
   [error] import org.apache.spark.sql.internal.SQLConf
   [error]        
   ```
   
   I also verified locally.
   
   ```
   $ build/sbt "sql/compile"
   ...
   [error] 
/Users/dongjoon/APACHE/spark-merge/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/V2ScanRelationPushDown.scala:451:19:
 not found: value VariantMetadata
   [error]                   
VariantMetadata.castErrorCompanionMetadata(ordinal.toString),
   [error]                   ^
   [error] 
/Users/dongjoon/APACHE/spark-merge/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/V2ScanRelationPushDown.scala:39:38:
 Unused import
   [error] Applicable -Wconf / @nowarn filters for this fatal warning: 
msg=<part of the message>, cat=unused-imports, 
site=org.apache.spark.sql.execution.datasources.v2
   [error] import org.apache.spark.sql.internal.SQLConf
   [error]                                      ^
   [warn] 5 warnings found
   [error] two errors found
   [error] (sql / Compile / compileIncremental) Compilation failed
   [error] Total time: 14 s, completed Jun 17, 2026, 9:22:03 PM
   ```
   
   Let me revert this from `branch-4.2` in oder to recover `branch-4.2` and 
unblock next RC.
   
   Please make an official backporting PR for `branch-4.2`.
   
   cc @huaxingao 
   
   


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