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https://issues.apache.org/jira/browse/FLINK-11769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xingcan Cui closed FLINK-11769.
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Resolution: Duplicate
> The estimateDataTypesSize method in FlinkRelNode causes NPE for Multiset
> ------------------------------------------------------------------------
>
> Key: FLINK-11769
> URL: https://issues.apache.org/jira/browse/FLINK-11769
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 1.6.4, 1.7.2
> Reporter: Xingcan Cui
> Priority: Major
>
> As raised in [this
> thread|https://lists.apache.org/thread.html/3a93723d2e74ae667a9aeb7d6ff28955f3ef79b5f20b4848b67fe709@%3Cuser.flink.apache.org%3E].
> The {{estimateDataTypesSize}} method in {{FlinkRelNode}} causes NPE for a
> {{Multiset<Map<String, String>>}} field type. Maybe the {{keyType}} or the
> {{valueType}} is empty in that case.
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