wolffcm opened a new pull request, #6369: URL: https://github.com/apache/arrow-datafusion/pull/6369
# Which issue does this PR close? <!-- We generally require a GitHub issue to be filed for all bug fixes and enhancements and this helps us generate change logs for our releases. You can link an issue to this PR using the GitHub syntax. For example `Closes #123` indicates that this PR will close issue #123. --> Closes #6367. # Rationale for this change This should be a performance improvement for queries that contain this pattern, and it may also be easier to push down predicates that use `=` or `!=` rather than regexes. It will also make it easier to find predicates that are looking for the empty string (an important case for [IOx's InfluxQL support](https://github.com/influxdata/influxdb_iox/issues/6902)). # What changes are included in this PR? This adds a pattern to `ExprSimplifier` to find regexes of the form `^foo$` and uses them to compare with a string literal instead of doing regex matching. # Are these changes tested? I included unit tests with the other regex simplifications that are performed. I also tested manually with `datafusion-cli`. # Are there any user-facing changes? No. -- 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]
