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https://issues.apache.org/jira/browse/KYLIN-5765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17832353#comment-17832353
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pengfei.zhan commented on KYLIN-5765:
-------------------------------------
h1. Design
The Issue description has clearly stated that the main reason for this
performance issue is due to frequent calls to the reflection method
RexToTblColRefTranslator.OLAPRexSqlStandardConvertletTable#registerUdfOperator.
OLAPRexSqlStandardConvertletTable#registerUdfOperator is frequently called due
to instantiation of OLAPRexSqlStandardConvertletTable. So we move the method
registerUdfOperator out, to avoid OLAPRexSqlStandardConvertletTable
instantiation leads to registerUdfOperator frequently call.
> Optimization of register udf operators
> --------------------------------------
>
> Key: KYLIN-5765
> URL: https://issues.apache.org/jira/browse/KYLIN-5765
> Project: Kylin
> Issue Type: Improvement
> Components: Query Engine
> Affects Versions: 5.0-beta
> Reporter: pengfei.zhan
> Assignee: pengfei.zhan
> Priority: Major
> Fix For: 5.0.0
>
> Attachments: 42118-2.png, 42118.png
>
>
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