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https://issues.apache.org/jira/browse/FLINK-8136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262911#comment-16262911
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ASF GitHub Bot commented on FLINK-8136:
---------------------------------------
Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/5054
+1
> Cast exception error on Flink SQL when using DATE_FORMAT
> --------------------------------------------------------
>
> Key: FLINK-8136
> URL: https://issues.apache.org/jira/browse/FLINK-8136
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Affects Versions: 1.4.0
> Environment: Any environment
> Reporter: David Marcos
> Assignee: Timo Walther
> Priority: Blocker
>
> Due to the shading of joda time there is a exception when CodeGenerator try
> to cast org.joda.time.format.DateTimeFormatter to
> org.apache.flink.table.shaded.org.joda.time.format.DateTimeFormatter
> This can be reproduce by using DATE_FORMAT temporal function in any flink SQL
> Affected scala file:
> ------------------------
> https://github.com/apache/flink/blob/master/flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/CodeGenerator.scala
> Affected method:
> --------------------------
> addReusableDateFormatter
> Affected code:
> -----------------------
> val field =
> s"""
> |final org.joda.time.format.DateTimeFormatter $fieldTerm;
> |""".stripMargin
> Fastest solution:
> -----------------------
> val field =
> s"""
> |final org.apache.flink.table.shaded.org.joda.time.format.DateTimeFormatter
> $fieldTerm;
> |""".stripMargin
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