Hi, I would like to propose standardizing how to represent statistics as Apache Arrow array.
Motivation: * We want to pass not only Apache Arrow data but also statistics of them through the C data interface for query planning. Approach: * Define a standardized schema for statistics. * Represent statistics as an Apache Arrow array that uses the schema. * Pass the statistics Apache Arrow array through the C data interface like a normal Apache Arrow array. Note that we don't define a new interface for statistics. We just use the existing C data interface. A statistics Apache Arrow array is passed through a separated API call. Note that this proposal doesn't define anything about how or where to use it. The above example just shows one use-case. This is based on the previous rejected vote discussion: https://lists.apache.org/thread/rsw3wsyj68dksc98s5rpdp6dn8hfk0yd See also: * The discussion of this: https://lists.apache.org/thread/b6chzlyn95rztoybs39b6olz907g12gj * The PR of this proposal: https://github.com/apache/arrow/pull/45058 * The preview URL of the PR: http://crossbow.voltrondata.com/pr_docs/45058/format/StatisticsSchema.html The vote will be open for at least 72 hours. [ ] +1 Accept this proposal [ ] +0 [ ] -1 Do not accept this proposal because... Thanks, -- kou
