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https://issues.apache.org/jira/browse/HUDI-3411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raymond Xu updated HUDI-3411:
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Issue Type: Improvement (was: Bug)
> Incorrect Record Key Field property Handling
> --------------------------------------------
>
> Key: HUDI-3411
> URL: https://issues.apache.org/jira/browse/HUDI-3411
> Project: Apache Hudi
> Issue Type: Improvement
> Reporter: Alexey Kudinkin
> Assignee: Raymond Xu
> Priority: Blocker
> Fix For: 0.11.0
>
>
> Currently `HoodieTableConfig#getRecordKeyFieldProp` returns a single String,
> even though it could contain a *list* of columns making up composite Primary
> Key.
> {code:java}
> public String getRecordKeyFieldProp() {
> return getStringOrDefault(RECORDKEY_FIELDS,
> HoodieRecord.RECORD_KEY_METADATA_FIELD);
> } {code}
>
> Most of the callers of this method are actually not handling this correctly,
> assuming that the Record Key is always a single field.
> NOTE: While concatenation of CPK seems like a very natural step here, special
> care has to be taken, since Composite PK can NOT be concatenated as strings,
> as this might break the uniqueness constraint.
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