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https://issues.apache.org/jira/browse/FLINK-40726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-40726:
-----------------------------------
Labels: pull-request-available (was: )
> Reading a key from a map returned by MAP_FROM_ARRAYS / MAP_FROM_ENTRIES /
> MAP_UNION fails with ClassCastException
> -----------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-40726
> URL: https://issues.apache.org/jira/browse/FLINK-40726
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 2.4.0
> Reporter: sepuri sai krishna
> Priority: Major
> Labels: pull-request-available
>
> Key access on a map produced by {{MAP_FROM_ARRAYS}}, {{MAP_FROM_ENTRIES}} or
> {{MAP_UNION}} fails at runtime:
> {code:sql}
> SELECT MAP_FROM_ARRAYS(k, v)['a'] FROM src;
> {code}
> {noformat}
> java.lang.ClassCastException: class
> org.apache.flink.table.runtime.util.MapDataContainer
> cannot be cast to class org.apache.flink.table.data.GenericMapData
> at BatchExecCalc$21.processElement(Unknown Source)
> {noformat}
> The same happens for {{MAP_FROM_ENTRIES}} and {{MAP_UNION}}. It fails in the
> generated operator while processing records, so the job fails rather than
> returning a wrong result. A map literal is unaffected: {{SELECT
> MAP['a',1]['a']}}
> returns 1.
> Reproduced on master against a table source, so not constant folding. I have a
> fix and tests ready, could someone assign this to me?
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