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[jira] [Created] (FLINK-9570) SQL Client merging environments uses AbstractMap

Dominik Wosiński created FLINK-9570:

             Summary: 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

Currently _Environment.merge()_ function looks like below: 

final Environment mergedEnv = new Environment();

// merge tables
final Map<String, TableDescriptor> tables = new HashMap<>(env1.getTables());
mergedEnv.tables = tables;

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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