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https://issues.apache.org/jira/browse/DRILL-7040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vitalii Diravka updated DRILL-7040:
-----------------------------------
Component/s: Tools, Build & Test
> Update Protocol Buffers syntax to proto3
> ----------------------------------------
>
> Key: DRILL-7040
> URL: https://issues.apache.org/jira/browse/DRILL-7040
> Project: Apache Drill
> Issue Type: Task
> Components: Tools, Build & Test
> Affects Versions: 1.15.0
> Reporter: Anton Gozhiy
> Priority: Major
> Fix For: Future
>
>
> Updating of protobuf library version is addressed by DRILL-6642.
> Although we still use proto2 syntax. To update the syntax to proto3 we need
> to meet some requirements:
> # Proto3 doesn't support required fields. So it is needed to change all
> existing required fields to optional. If we expect such fields to be always
> present in the messages, we need to revisit the approach.
> # Custom default values are no more supported. And Drill uses custom defaults
> in some places. The impact from removal of them should be further
> investigated, but it would definitely require changes in logic.
> # No more ability to determine if a missing field was not included, or was
> assigned the default value. Need investigation whether it is used in code.
> # Support for nested groups is excluded from proto3. This shouldn't be a
> problem as they are not used in Drill.
> # Protostuff and protobuf-maven-plugin should be also updated which may cause
> some compatibility issues.
> Links to the language specs:
> [Proto2|https://developers.google.com/protocol-buffers/docs/proto]
> [Proto3|https://developers.google.com/protocol-buffers/docs/proto3]
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