[GitHub] [incubator-druid] egor-ryashin commented on issue #7468: CASE with multiple types fails: Illegal mixing of types in CASE or COALESCE statement

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egor-ryashin commented on issue #7468: CASE with multiple types fails: Illegal mixing of types in CASE or COALESCE statement
URL: https://github.com/apache/incubator-druid/issues/7468#issuecomment-482894507
 
 
   It works with MySQL:
   ```sql
   select (case datasource when datasource = 'wikipedia' then datasource else 0 end) from druid_segments limit 10;
   ```

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