nbauernfeind commented on a change in pull request #11646:
URL: https://github.com/apache/arrow/pull/11646#discussion_r745790024
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File path: format/Schema.fbs
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@@ -37,14 +37,20 @@ enum MetadataVersion:short {
/// >= 0.8.0 (December 2017). Non-backwards compatible with V3.
V4,
- /// >= 1.0.0 (July 2020. Backwards compatible with V4 (V5 readers can read V4
+ /// 1.0.0 -> 6.0.0 (July 2020). Backwards compatible with V4 (V5 readers can
read V4
/// metadata and IPC messages). Implementations are recommended to provide a
/// V4 compatibility mode with V5 format changes disabled.
///
/// Incompatible changes between V4 and V5:
/// - Union buffer layout has changed. In V5, Unions don't have a validity
/// bitmap buffer.
V5,
+
+ /// >= 7.0.0 (Jan 2022). Backwards compatible with V4 and V5.
+ ///
+ /// Adds ColumnBag to wire format. It has looser restrictions than
RecordBatch but is
+ /// otherwise similar in intent.
+ V6
Review comment:
I'll back this out; will be happy to add it back when applicable and/or
requested =P.
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