felipepessoto opened a new issue, #12779: URL: https://github.com/apache/gluten/issues/12779
## Description The Delta-on-Gluten CI gate (Delta Spark UT pipeline) started failing on `main` with new regressions (test failures not present in `known-failures.txt`) after the daily Velox version bump. ## Suspected root cause PR #12769 "[GLUTEN-6887][VL] Daily Update Velox Version (2026_08_14)" bumped the Velox pin and pulled in upstream Velox commit `a96d0415c` — **"fix(spark): Enable ANSI-compliant cast from DECIMAL to DECIMAL"**. This directly changes DECIMAL cast/overflow semantics, which matches the failure symptoms below. ## Failing CI jobs (fork run, same as would occur on `main`) - https://github.com/felipepessoto/gluten/actions/runs/31841332178/job/94917197286 (shard 0) - https://github.com/felipepessoto/gluten/actions/runs/31841332178/job/94917197271 (shard 2) - https://github.com/felipepessoto/gluten/actions/runs/31841332178/job/94917197178 (shard 3) ## New regressions (not previously in `known-failures.txt`) ``` org.apache.spark.sql.delta.ImplicitMergeCastingSuite#MERGE overflow in WHEN MATCHED THEN UPDATE SET t.value = s.value sourceType: DECIMAL(3,1), targetType: DECIMAL(3,2) followAnsiEnabled: false, ansiEnabled: true, storeAssignmentPolicy: LEGACY org.apache.spark.sql.delta.ImplicitStreamingMergeCastingSuite#Streaming MERGE overflow sourceType: DECIMAL(3,1), targetType: DECIMAL(3,2) followAnsiEnabled: false, ansiEnabled: true, storeAssignmentPolicy: LEGACY org.apache.spark.sql.delta.typewidening.TypeWideningInsertSchemaEvolutionBasicSuite#INSERT - never automatic type widening DECIMAL(9,2) -> DECIMAL(18,2) org.apache.spark.sql.delta.typewidening.TypeWideningInsertSchemaEvolutionBasicSuite#INSERT - never automatic type widening DECIMAL(9,2) -> DECIMAL(19,3) ``` ## Next steps - [ ] Investigate whether the Velox decimal-cast ANSI behavior change is correct and Gluten/Delta expectations need updating, or whether this is a genuine bug to fix in Gluten. - [ ] Short-term: add the above tests to `known-failures.txt` to unblock CI (see linked PR). Generated-by: Claude claude-sonnet-5 (GitHub Copilot CLI) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
