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https://issues.apache.org/jira/browse/HUDI-4527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17706332#comment-17706332
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Sagar Sumit commented on HUDI-4527:
-----------------------------------
Should be fixed by
https://github.com/apache/hudi/commit/e3dabbc3ad0a686c1bc526eb9b21586fe665812f
> wrong data after compaction in MOR table by flink
> -------------------------------------------------
>
> Key: HUDI-4527
> URL: https://issues.apache.org/jira/browse/HUDI-4527
> Project: Apache Hudi
> Issue Type: Bug
> Components: flink, flink-sql
> Reporter: wuwenchi
> Priority: Critical
> Labels: pull-request-available
>
> A MOR table with primarykey and preCombine field, after compaction, it will
> generate a parquet file. Insert one record, a log file will be generated.
> If the preCombine in the log is smaller than the parquet, the record in the
> parquet should eventually be returned, but now the data in the log is
> returned incorrectly. If it is a table in COW mode, there is no such problem.
> Such as:
> create table t1(
> uuid int,
> ts int,
> PRIMARY KEY(uuid) NOT ENFORCED
> ) with (
> 'connector' = 'hudi',
> 'read.data.skipping.enabled' = 'true',
> 'write.precombine' = 'true',
> 'hoodie.datasource.write.recordkey.field' = 'uuid',
> 'path' = '........',
> 'table.type' = 'MERGE_ON_READ',
> 'compaction.delta_commits' = '2',
> 'hoodie.compact.inline' = 'true'
> );
> insert into t1 values(1, 1); ---- deltacommit
> insert into t1 values(1, 100); ---- deltacommit --> compaction
> --> parquent
> insert into t1 values(1, 2); ---- deltacommit
> select * from t1;
> It will return [+I[1, 2]], but in COPY_ON_WRITE mode, it will return [+I[1,
> 100]].
>
>
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