Hi All. `branch-1.9` is created to prepare Apache ORC 1.9.0 and `main` branch is bumped to 2.0.0.
- Milestone for 1.9: https://github.com/apache/orc/milestone/10 - Milestone for 2.0: https://github.com/apache/orc/milestone/20 In general, Apache ORC releases have been aligned with Apache Spark releases and maintenance cycles with a longer support period. - ORC 1.6.x <-> Spark 3.2.x (End-Of-Life) - ORC 1.7.x <-> Spark 3.3.x - ORC 1.8.x <-> Spark 3.4.x - ORC 1.9.x <-> Spark 3.5.x In addition to the planned on-going 1.7.x/1.8.x/1.9.x, we can start Apache ORC 2.0 as a good opportunity to reduce technical debt like removing Hadoop 2 and supporting Java 21 LTS. Of course, we may want to create ORC 1.10.x later from `branch-1.9`. Apache ORC v2.x is a parallel stream that will not block anything of 1.x. If needed, we will discuss it later after Apache ORC 1.9 release. Lastly, for now, `main` branch keeps ORC File Format `v0.12` for Apache ORC 2.0 because ORC File Format Versions (v0.11, v0.12, UNSTABLE-PRE-2.0) are orthogonal from Apache ORC library versions (1.6.x ~ 2.0.x). Like Apache Parquet or Arrow, we may want to explicitly split repositories at this time. Please let us know your opinion about the new `main` branch version and release schedule. Also, feel free to create GitHub Issues for the milestone in order to do planning together. Thanks, Dongjoon.
