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https://issues.apache.org/jira/browse/FLINK-38030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17987307#comment-17987307
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Xuyang Zhong edited comment on FLINK-38030 at 7/3/25 1:22 AM:
--------------------------------------------------------------
Merge into
* master: 5497b714347d017522daa4b96e9d0c8de2a1cd7b
* 2.0: ce7a468ae1204600ce297461c4ecb6ee4499ef27
* 2.1: 745e2bd60ccce3e7c116bb5f4db53c8bfb3bbcf0
was (Author: xuyangzhong):
Merge into master: 5497b714347d017522daa4b96e9d0c8de2a1cd7b
> 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
> Labels: pull-request-available
> 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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