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[HUDI-3907][RFC-52] RFC for Introduce Secondary Index to Improve Hudi Query Performance

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## What is the purpose of the pull request RFC for Introduce Secondary Index to Improve HUDI Query Performance ## Brief change log - Modify rfc/README.md - Add rfc/rfc-52 dir...

huberylee

[HUDI-9444] WIP Improve Key Lookup for HFile/Metadata

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### Change Logs _Describe context and summary for this change. Highlight if any code was copied._ ### Impact _Describe any public API or user-facing feature change or any performance impact._...

yihua

how to get primary key from one hoodie table

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is there any to get primary key from one existing hoodie table

njalan

[HUDI-9442] Improve key lookup in metadata table

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### Change Logs _Describe context and summary for this change. Highlight if any code was copied._ ### Impact _Describe any public API or user-facing feature change or any performance impact._...

yihua

[DNM][Stacked on 12983] Refactor MDT update logic with Indexer abstraction

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### Change Logs _Describe context and summary for this change. Highlight if any code was copied._ ### Impact _Describe any public API or user-facing feature change or any performance impact._...

yihua

[HUDI-9172] Fix timestamp millis being read as micros for log files

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### Change Logs _Describe context and summary for this change. Highlight if any code was copied._ ### Impact _Describe any public API or user-facing feature change or any performance impact._...

jonvex

[SUPPORT] Hudi COW not honouring file size config

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**_Tips before filing an issue_** - Have you gone through our [FAQs](https://hudi.apache.org/learn/faq/)? - Join the mailing list to engage in conversations and get faster support at [email protected]. - If you...

logesr

[HUDI-9154] Allow bootstrap to complete without updating col stats

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### Change Logs Since #12529 , `BaseCommitActionExecutor` would update col stats by default. But bootstrap operation doesn't support col stats and will fail the bootstraping - https://github.com/apache/hudi/blob/63362ad7b69d0bea50caceb1e744c53454a1cc23/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/action/bootstrap/SparkBootstrapCommitActionExecutor.java#L225 This PR is...

CTTY

[SUPPORT] now hudi use 1st api of flink sink, and flink suggest 2nd of api "org.apache.flink.api.connector.sink2.Sink", would hudi support it?

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**Describe the problem you faced** now hudi use 1st api of flink sink, and flink suggest 2nd of api "org.apache.flink.api.connector.sink2.Sink", would hudi support it? yeach i wanta hudi to support...

lschampion

**Describe the problem you faced** Hy, I have an issue with the built-in Cloudwatch Metrics reporter, where it's failing to send some metrics to cloudwatch. It seems to me as...

szingerpeter