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https://issues.apache.org/jira/browse/BEAM-2281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16482792#comment-16482792
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Kenneth Knowles commented on BEAM-2281:
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>From [~apilloud] it also looks like code gen for assembling expressions as in
>https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableCalc.java
> call SqlFunctions in operator implementation
> --------------------------------------------
>
> Key: BEAM-2281
> URL: https://issues.apache.org/jira/browse/BEAM-2281
> Project: Beam
> Issue Type: Improvement
> Components: dsl-sql
> Reporter: Xu Mingmin
> Priority: Major
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> Calcite has a collections of functions in
> {{org.apache.calcite.runtime.SqlFunctions}}. It sounds a good source to
> leverage when adding operators as {{BeamSqlExpression}}.
> [~xumingming] [~app-tarush], any comments?
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