[jira] [Updated] (HUDI-3411) Incorrect Record Key Field property Handling

["Jonathan Vexler (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HUDI-3411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Vexler updated HUDI-3411:
----------------------------------
    Status: Open  (was: In Progress)

> 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: Jonathan Vexler
>            Priority: Blocker
>             Fix For: 0.13.0
>
>
> 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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