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ARROW-9258: [FORMAT] Add V5 MetadataVersion to Schema.fbs #7566

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ARROW-9258: [FORMAT] Add V5 MetadataVersion to Schema.fbs #7566

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15 changes: 11 additions & 4 deletions format/Schema.fbs
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Original file line number Diff line number Diff line change
Expand Up @@ -20,17 +20,24 @@
namespace org.apache.arrow.flatbuf;

enum MetadataVersion:short {
/// 0.1.0
/// 0.1.0 (October 2016).
V1,

/// 0.2.0
/// 0.2.0 (February 2017). Non-backwards compatible with V1.
V2,

/// 0.3.0 -> 0.7.1
/// 0.3.0 -> 0.7.1 (May - December 2017). Non-backwards compatible with V2.
V3,

/// >= 0.8.0
/// >= 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
/// metadata and IPC messages). Implementations are recommended to provide a
/// V4 compatibility mode with V5 format changes disabled.
///
/// TODO: Add list of non-forward compatible changes.
V5,
}

/// These are stored in the flatbuffer in the Type union below
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