Github user pnowojski commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6323#discussion_r202281623
  
    --- Diff: 
flink-libraries/flink-sql-client/src/main/java/org/apache/flink/table/client/config/Environment.java
 ---
    @@ -214,15 +216,18 @@ private static TableDescriptor 
createTableDescriptor(String name, Map<String, Ob
                if (typeObject == null || !(typeObject instanceof String)) {
                        throw new SqlClientException("Invalid 'type' attribute 
for table '" + name + "'.");
                }
    -           final String type = (String) config.get(TABLE_TYPE);
    +           final String type = (String) typeObject;
    +           final Map<String, Object> properties = new HashMap<>(config);
    --- End diff --
    
    copy of `config` named as `properties`? this is confusing. Rename `config` 
to `properties` and inline this copy? Or inline `properties` and rename 
`normalizedProperties` back to `normalizedConfig`


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