[v24.1.x] Transforms: Fix deploy-time timequery bug #20139
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Default behavior is for transforms to start processing input from an offset equivalent to "the latest committed offset at deploy time". However, in situations where no records are committed between the moment the transform was deployed and the moment the transform starts, the timequery servicing this logic returns an empty result, which is handled by returning offset::min, which signals the transform to begin processing at the beginning of the topic. This commit adjusts the logic in source::offset_at_timestamp to return nullopt for an empty timequery result, and the handling of that nullopt to resolve the transform start offset to latest. Signed-off-by: Oren Leiman <oren.leiman@redpanda.com> (cherry picked from commit 2401fa3)
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michael-redpanda
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pgellert
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rockwotj
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Specifically in situations where no records are produced between deploy time and start time. Signed-off-by: Oren Leiman <oren.leiman@redpanda.com> (cherry picked from commit 0f49b21)
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force push for missing exception import that was added upstream to test an unrelated, unbackported feature. |
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Backport of PR #20127