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Posted to commits@calcite.apache.org by GitBox <gi...@apache.org> on 2019/03/05 18:27:30 UTC

[GitHub] [calcite] amaliujia commented on issue #1083: [CALCITE-2889] IndexOutOfBoundsException thrown if targetTypes[] contains varargs

amaliujia commented on issue #1083: [CALCITE-2889] IndexOutOfBoundsException thrown if targetTypes[] contains varargs
URL: https://github.com/apache/calcite/pull/1083#issuecomment-469796188
 
 
   @zabetak 
   
   In BeamSQL, we support UDF by [this way](https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/ScalarFunctionImpl.java#L122). We also use Calcite to generate java code for SQL functions (see [here](https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamCalcRel.java#L149)).
   
   Basically `ReflectiveCallNotNullImplementor` is the one to convert UDF in BeamSQL to Expression.

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