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Posted to issues-all@impala.apache.org by "Peter Rozsa (Jira)" <ji...@apache.org> on 2023/01/26 14:07:00 UTC
[jira] [Work started] (IMPALA-11854) ImpalaStringWritable's underlying array can't be changed in UDFs
[ https://issues.apache.org/jira/browse/IMPALA-11854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on IMPALA-11854 started by Peter Rozsa.
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> ImpalaStringWritable's underlying array can't be changed in UDFs
> ----------------------------------------------------------------
>
> Key: IMPALA-11854
> URL: https://issues.apache.org/jira/browse/IMPALA-11854
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 4.3.0
> Reporter: Peter Rozsa
> Assignee: Peter Rozsa
> Priority: Major
>
> ImpalaStringWritable's getBytes() implementation returns the copy of the underlying buffer, therefore the original value can't be changed. This behavior makes UDFs work erroneously when they contain operations that would change the BINARY/TEXT arguments. For example:
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/udf/esri/ST_SetSRID.java#L47]
> where the incoming `geomref` argument should change, but it gets returned unchanged.
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