emkornfield commented on a change in pull request #12571:
URL: https://github.com/apache/arrow/pull/12571#discussion_r820259830
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File path: format/Flight.proto
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@@ -301,6 +301,33 @@ message Location {
*/
message Ticket {
bytes ticket = 1;
+ // Data representing some part of the data retrievable by the ticket.
+ //
+ // `inlined_completeness` indicates what part of the data retriavable
+ // by the ticket this represents. This is provided as an optimization for
+ // client/server applications that want to reduce latency to first result
+ // without requiring another RPC round-trip to retrieve the ticket.
applications
+ // built on top of Flight are responsible for any negotiation necessary on
whether
+ // inlining data is appropriate.
+ //
+ // The size of inlined_data is expected to be small (typically less then
1MB)
+ // and inlining too much data across tickets can run into underlying
transport
+ // limitations. Furthermore, since the data is expected to be small,
implementations
+ // are less likely to optimize for zero-copy in these cases.
+ repeated FlightData inlined_data = 2;
+ enum InlinedCompleteness {
+ // Default is no data is inlined. An UNDEFINED value is not provided
because an enum
+ // for the data that the client isn't aware of makes the data unusable.
+ NO_INLINED_DATA = 0;
+ // The data present in inlined_data represents all data
+ // present for the ticket.
+ COMPLETE_DATA = 1;
+ // The data present for inlined_data represents only a partial
+ // sample of the data available for the ticket. No guarantees on the
+ // ordering are provided.
+ SAMPLE_DATA = 2;
Review comment:
Yeah i think this is what @BryanCutler suggested on the mailing list
thread.
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