rgbuilds opened a new pull request, #26452: URL: https://github.com/apache/datafusion/pull/26452
## Which issue does this PR close? - Closes #26451. ## Rationale for this change Casting timestamp statistics to time-of-day values does not preserve ordering across midnight. This can invert the minimum and maximum used by statistics pruning and incorrectly discard files or row groups that contain matching rows. ## What changes are included in this PR? - Prevent timestamp-to-`Time32` and timestamp-to-`Time64` casts from being used for statistics pruning. - Add pruning-expression coverage for both `CAST` and `TRY_CAST` across all supported time units. - Add a Parquet regression test whose timestamp bounds cross midnight. ## What is the testing strategy for this PR? The regression test verifies equality and range predicates for `Time32` and `Time64`, including the expected row counts and pruning metrics. The full extended workspace test suite also passes. ## Are there any user-facing changes? Queries that cast timestamps to time-of-day values may perform less statistics pruning, but they no longer risk incorrect results when timestamp bounds cross a day boundary. -- 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]
