comphead commented on code in PR #2191: URL: https://github.com/apache/datafusion-comet/pull/2191#discussion_r2288529345
########## docs/source/contributor-guide/roadmap.md: ########## @@ -0,0 +1,64 @@ +<!-- +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +--> + +# Comet Roadmap + +Comet is an open-source project and contributors are welcome to work on any issues at any time, but we find it +helpful to have a roadmap for some of the major items that require coordination between contributors. + +## Major Initiatives + +### Iceberg Integration + +Iceberg integration is still a work-in-progress ([#2060]), with major improvements expected in the next few +releases. Once this integration is complete, we plan on switching from the `native_comet` scan to the +`native_iceberg_compat` scan ([#2189]) so that complex types can be supported. + +[#2060]: https://github.com/apache/datafusion-comet/issues/2060 +[#2189]: https://github.com/apache/datafusion-comet/issues/2189 + +### Spark 4.0.0 Support + +Comet has experimental support for Spark 4.0.0, but there is more work to do ([#1637]), such as enabling +more Spark SQL tests and fully implementing ANSI support ([#313]) for all supported expressions. + +[#313]: https://github.com/apache/datafusion-comet/issues/313 +[#1637]: https://github.com/apache/datafusion-comet/issues/1637 + +### Removing the native_comet scan implementation + +We are working towards deprecating ([#2186]) and removing ([#2177]) the `native_comet` scan implementation, which +is the originally scan implementation that uses mutable buffers (which is incompatible with best practices around +Arrow FFI) and does not support complex types. + +Once we are using the `native_iceberg_compat` scan (which is based on DataFusion's `DataSourceExec`) in the Iceberg +integration, we will be able to remove the `native_comet` scan implementation, and can then improve the efficiency +of our use of Arrow FFI ([#2171]). + +[#2186]: https://github.com/apache/datafusion-comet/issues/2186 +[#2171]: https://github.com/apache/datafusion-comet/issues/2171 +[#2177]: https://github.com/apache/datafusion-comet/issues/2177 + +## Ongoing Improvements + +In addition to the major initiatives above, we have the following ongoing areas of work: + +- Adding support for more Spark expressions +- Moving more expressions to the `datafusion-spark` crate in the core DataFusion repository +- Performance tuning Review Comment: ```suggestion - Performance tuning - Nested type support improvements ``` -- 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: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
