Peihui He created ZEPPELIN-5209:
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Summary: flink interpreter: Could not register temporary system
function. A function named 'HashFunction' does already exist.
Key: ZEPPELIN-5209
URL: https://issues.apache.org/jira/browse/ZEPPELIN-5209
Project: Zeppelin
Issue Type: Improvement
Components: flink
Affects Versions: 0.9.0
Reporter: Peihui He
Fix For: 0.9.1
To create an udf according to the [official
example|https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/table/functions/udfs.html#scalar-functions]，we
will get the following error:
org.apache.flink.table.api.ValidationException: Could not register temporary
system function. A function named 'HashFunction' does already exist.
!image-2021-01-19-18-29-39-286.png!
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