[
https://issues.apache.org/jira/browse/BEAM-12473?focusedWorklogId=609650&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-609650
]
ASF GitHub Bot logged work on BEAM-12473:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 10/Jun/21 11:20
Start Date: 10/Jun/21 11:20
Worklog Time Spent: 10m
Work Description: je-ik opened a new pull request #14986:
URL: https://github.com/apache/beam/pull/14986
Fixes [BEAM-12473] and add a hint to possible solution by using
```java
registerUdaf(
"MAX_LENGTH",
new UdfTypeUtils.CombineFnDelegate<>(
Max.of(
(Comparator<String> & Serializable)
(a, b) -> Integer.compare(a.length(), b.length()))) {}))
```
------------------------
Thank you for your contribution! Follow this checklist to help us
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reviewer(s)**](https://beam.apache.org/contribute/#make-your-change) and
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`ValidatesRunner` compliance status (on master branch)
--------------------------------------------------------
<table>
<thead>
<tr>
<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
</tr>
</thead>
<tbody>
<tr>
<td>Go</td>
<td>---</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/badge/icon";>
</a>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Go_VR_Flink/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Go_VR_Flink/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>---</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Go_VR_Spark/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Go_VR_Spark/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>---</td>
</tr>
<tr>
<td>Java</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_ULR/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_ULR/lastCompletedBuild/badge/icon";>
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</td>
<td>
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<img alt="Build Status"
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<td>
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</td>
</tr>
<tr>
<td>Python</td>
<td>---</td>
<td>
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href="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/";>
<img alt="Build Status"
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</td>
<td>
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<img alt="Build Status"
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</a>
</td>
<td>---</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>---</td>
</tr>
<tr>
<td>XLang</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Direct/lastCompletedBuild/";>
<img alt="Build Status"
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</a>
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<td>
<a
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<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Flink/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>---</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Spark/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Spark/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>---</td>
</tr>
</tbody>
</table>
Examples testing status on various runners
--------------------------------------------------------
<table>
<thead>
<tr>
<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
</tr>
</thead>
<tbody>
<tr>
<td>Go</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
<tr>
<td>Java</td>
<td>---</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/badge/icon?subject=V1";>
</a><br>
<a
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src="https://ci-beam.apache.org/job/beam_PostCommit_Java_Examples_Dataflow_V2/lastCompletedBuild/badge/icon?subject=V2";>
</a><br>
</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
<tr>
<td>Python</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
<tr>
<td>XLang</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
</tbody>
</table>
Post-Commit SDK/Transform Integration Tests Status (on master branch)
------------------------------------------------------------------------------------------------
<table>
<thead>
<tr>
<th>Go</th>
<th>Java</th>
<th>Python</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/badge/icon";>
</a>
</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/";>
<img alt="Build Status"
src="https://ci-beam.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/badge/icon?subject=3.6";>
</a><br>
<a
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src="https://ci-beam.apache.org/job/beam_PostCommit_Python37/lastCompletedBuild/badge/icon?subject=3.7";>
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<img alt="Build Status"
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</a>
</td>
</tr>
</tbody>
</table>
Pre-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
<table>
<thead>
<tr>
<th>---</th>
<th>Java</th>
<th>Python</th>
<th>Go</th>
<th>Website</th>
<th>Whitespace</th>
<th>Typescript</th>
</tr>
</thead>
<tbody>
<tr>
<td>Non-portable</td>
<td>
<a
href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/";>
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<tr>
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<td>---</td>
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<td>---</td>
<td>---</td>
<td>---</td>
</tr>
</tbody>
</table>
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Issue Time Tracking
-------------------
Worklog Id: (was: 609650)
Remaining Estimate: 0h
Time Spent: 10m
> ClassCastException when using registerUdaf in Calcite SQL
> ---------------------------------------------------------
>
> Key: BEAM-12473
> URL: https://issues.apache.org/jira/browse/BEAM-12473
> Project: Beam
> Issue Type: Bug
> Components: dsl-sql
> Affects Versions: 2.31.0
> Reporter: Jan Lukavský
> Assignee: Jan Lukavský
> Priority: P2
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When using {{registerUdaf}} as follows:
> {code:java}
> .registerUdaf(
> "LONGEST_WORD",
> Max.of(
> (Comparator<String> & Serializable)
> (String a, String b) ->
> Integer.compare(a.length(), b.length()))))
> {code}
> results in following exception:
> {noformat}
> Caused by: java.lang.ClassCastException: class
> sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to
> class java.lang.Class
> (sun.reflect.generics.reflectiveObjects.TypeVariableImpl and java.lang.Class
> are in module java.base of loader 'bootstrap')
> at
> org.apache.beam.sdk.extensions.sql.impl.utils.CalciteUtils.sqlTypeWithAutoCast(CalciteUtils.java:327)
> at
> org.apache.beam.sdk.extensions.sql.impl.UdafImpl$1.getType(UdafImpl.java:73)
> at
> org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.prepare.CalciteCatalogReader.toOp(CalciteCatalogReader.java:315)
> at
> org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.prepare.CalciteCatalogReader.toOp(CalciteCatalogReader.java:302)
> at
> org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.prepare.CalciteCatalogReader.lambda$lookupOperatorOverloads$3(CalciteCatalogReader.java:271)
> at
> java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
> at
> java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
> {noformat}
> If this way of registering UDAF is not supported, it should throw a more
> user-friendly exception.
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