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Posted to issues@flink.apache.org by "Xuyang Zhong (Jira)" <ji...@apache.org> on 2025/06/30 02:36:00 UTC
[jira] [Assigned] (FLINK-38030) Table.explainSql throw exception: xxx cannot be cast to class org.apache.flink.table.catalog.AbstractCatalog
[ https://issues.apache.org/jira/browse/FLINK-38030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xuyang Zhong reassigned FLINK-38030:
------------------------------------
Assignee: Xuyang Zhong
> Table.explainSql throw exception: xxx cannot be cast to class org.apache.flink.table.catalog.AbstractCatalog
> ------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-38030
> URL: https://issues.apache.org/jira/browse/FLINK-38030
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 2.0.0
> Reporter: Hongshun Wang
> Assignee: Xuyang Zhong
> Priority: Major
> Fix For: 2.1
>
>
> My catalog is implements org.apache.flink.table.catalog.Catalog rather than extends AbstractCatalog. When execute TableEnvironment.explainSql, exception will be thrown:
>
> {code:java}
> java.lang.ClassCastException: class com.demo.FlinkCatalog cannot be cast to class org.apache.flink.table.catalog.AbstractCatalog (com.alibaba.fluss.flink.catalog.FlinkCatalog and org.apache.flink.table.catalog.AbstractCatalog are in unnamed module of loader 'app')
> at org.apache.flink.table.planner.lineage.TableLineageDatasetImpl.<init>(TableLineageDatasetImpl.java:52) at org.apache.flink.table.planner.lineage.TableLineageUtils.createTableLineageDataset(TableLineageUtils.java:53) at org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecTableSourceScan.translateToPlanInternal(CommonExecTableSourceScan.java:205) at org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:168) at org.apache.flink.table.planner.delegation.StreamPlanner.$anonfun$translateToPlan$1(StreamPlanner.scala:85) at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:286) at scala.collection.Iterator.foreach(Iterator.scala:943) at scala.collection.Iterator.foreach$(Iterator.scala:943) at scala.collection.AbstractIterator.foreach(Iterator.scala:1431) at scala.collection.IterableLike.foreach(IterableLike.scala:74) at scala.collection.IterableLike.foreach$(IterableLike.scala:73) at scala.collection.AbstractIterable.foreach(Iterable.scala:56) at scala.collection.TraversableLike.map(TraversableLike.scala:286) at scala.collection.TraversableLike.map$(TraversableLike.scala:279) at scala.collection.AbstractTraversable.map(Traversable.scala:108) at org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:84) at org.apache.flink.table.planner.delegation.PlannerBase.getExplainGraphs(PlannerBase.scala:627) at org.apache.flink.table.planner.delegation.StreamPlanner.explain(StreamPlanner.scala:103) at org.apache.flink.table.planner.delegation.StreamPlanner.explain(StreamPlanner.scala:51) at org.apache.flink.table.api.internal.TableEnvironmentImpl.explainInternal(TableEnvironmentImpl.java:753) at org.apache.flink.table.api.internal.TableEnvironmentImpl.explainSql(TableEnvironmentImpl.java:733) at org.apache.flink.table.api.TableEnvironment.explainSql(TableEnvironment.java:1155) {code}
>
> AbstractCatalog is an internal class, thus we don't want to use it outside.
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