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https://issues.apache.org/jira/browse/FLINK-9570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16509560#comment-16509560
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Timo Walther commented on FLINK-9570:
-------------------------------------
[~Wosinsan] you should have contributor permissions now :)
> SQL Client merging environments uses AbstractMap
> ------------------------------------------------
>
> Key: FLINK-9570
> URL: https://issues.apache.org/jira/browse/FLINK-9570
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.5.0
> Reporter: Dominik Wosiński
> Priority: Major
>
> Currently _Environment.merge()_ function looks like below:
>
> {code:java}
> final Environment mergedEnv = new Environment();
> // merge tables
> final Map<String, TableDescriptor> tables = new HashMap<>(env1.getTables());
> mergedEnv.getTables().putAll(env2.getTables());
> mergedEnv.tables = tables;
> {code}
> and no-arg constructor for _Environment_ defaults tables to
> _Collections.emptyMap()._
> This basically results in calling _putAll_ on _EmptyMap_ which defaults to
> _AbstractMap_ which always throws _UnsuppoertedOperationException._
>
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