+1 (non-binding), thanks for pushing this forward Rok! On Wed, Nov 4, 2026 at 01:01 Rok Mihevc <[email protected]> wrote:
> Hi all, > > I'd like to start a vote to add the FINITE_VECTOR logical type to the > Parquet format, as specified in parquet-format PR 624 [1] (at commit > 0596fde). > If you'd like to discuss this proposal please use the active discussion > thread [2]. > > FINITE_VECTOR is roughly: > - annotates the same structure used for LIST, giving unaware readers a > fallback > - every non-null vector has exactly num_elements elements > - elements are required (non-null) and finite (no NaN, null, +Inf or -Inf) > > Writers must enforce these rules, and readers may rely on them. This > proposal does not add a new physical representation and doesn't preclude > one later. > > This came out of active discussions on the list [2][3] and the community > syncs. The type was renamed from VECTOR to FINITE_VECTOR to indicate it's > specific requirements and to leave room for a more general vector type. > > Implementations: > - parquet-java: [4] > - parquet-cpp: [5] > > This vote will be open for at least 72 hours. > > [ ] +1: Add FINITE_VECTOR to the Parquet spec > [ ] +0: Not going to block, but prefer ... > [ ] -1: Do not add FINITE_VECTOR to Parquet because ... > > Thanks to everyone who took part in the discussions and reviews! > > Rok > > [1] https://github.com/apache/parquet-format/pull/624 > [2] https://lists.apache.org/thread/kgmgn2vmrz49thbfhv8b66lglsyd81xt > [3] https://lists.apache.org/thread/xot5f3ghhtc82n1bf0wdl9zqwlrzqks3 > [4] https://github.com/apache/parquet-java/pull/3876 > [5] https://github.com/apache/arrow/pull/55348 >
