Peter Rozsa created IMPALA-11854:
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Summary: 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
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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