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https://issues.apache.org/jira/browse/BEAM-12166?focusedWorklogId=586634&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-586634
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ASF GitHub Bot logged work on BEAM-12166:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 21/Apr/21 14:56
Start Date: 21/Apr/21 14:56
Worklog Time Spent: 10m
Work Description: anupd22 commented on pull request #14534:
URL: https://github.com/apache/beam/pull/14534#issuecomment-824128284
Hi @ibzib
Please let me know if anything else is needed from my side on this.
Thanks.
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Issue Time Tracking
-------------------
Worklog Id: (was: 586634)
Time Spent: 1h (was: 50m)
> Beam Sql - Combine Accumulator return Map fails with class cast exception
> -------------------------------------------------------------------------
>
> Key: BEAM-12166
> URL: https://issues.apache.org/jira/browse/BEAM-12166
> Project: Beam
> Issue Type: Bug
> Components: dsl-sql
> Reporter: anup
> Assignee: anup
> Priority: P3
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Suppose, we have following query where *UDAF error_aggregator* returns
> Map<String,String>
> {code:java}
> select error_name, error_aggregator(error_types) as error_types_aggregated "
> +"from PCOLLECTION group by error_name").registerUdaf("error_aggregator",
> new ErrorTypeAggregator(){code}
>
> {code:java}
> class ErrorTypeAggregator extends CombineFn<String, String,
> HashMap<String,String>> {
> ...
> }
> {code}
>
> It fails with following exception.
> {code:java}
> Exception in thread "main"
> org.apache.beam.sdk.extensions.sql.impl.ParseException: Unable to parse query
> select error_name, error_aggregator(error_types) as error_types_aggregated
> from PCOLLECTION group by error_nameException in thread "main"
> org.apache.beam.sdk.extensions.sql.impl.ParseException: Unable to parse query
> select error_name, error_aggregator(error_types) as error_types_aggregated
> from PCOLLECTION group by error_name at
> org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner.convertToBeamRel(CalciteQueryPlanner.java:199)
> at
> org.apache.beam.sdk.extensions.sql.impl.BeamSqlEnv.parseQuery(BeamSqlEnv.java:114)
> at
> org.apache.beam.sdk.extensions.sql.SqlTransform.expand(SqlTransform.java:140)
> at
> org.apache.beam.sdk.extensions.sql.SqlTransform.expand(SqlTransform.java:86)
> at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:547) at
> org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:481) at
> org.apache.beam.sdk.values.PCollection.apply(PCollection.java:357) at
> com.my.company.UdafMapOutput.main(UdafMapOutput.java:70)Caused by:
> org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.tools.ValidationException:
> java.lang.ClassCastException:
> org.apache.beam.vendor.guava.v26_0_jre.com.google.common.reflect.Types$ParameterizedTypeImpl
> cannot be cast to java.lang.Class at
> org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.prepare.PlannerImpl.validate(PlannerImpl.java:217)
> at
> org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner.convertToBeamRel(CalciteQueryPlanner.java:168)
> ... 7 more{code}
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