gianm opened a new issue #10184:
URL: https://github.com/apache/druid/issues/10184


   In JDBC there are two common ways of setting connection properties, which 
are used to pass query context parameters through to Druid SQL and Druid native 
queries. (Additionally, some of them, like "user" and "password", are used for 
internal purposes by the driver.)
   
   1. Properties object "props" passed into `DriverManager.getConnection(url, 
props)`.
   2. Semicolon-separated key=value pairs appended to the "url" parameter of 
the same method.
   
   Today (0.18.0) Druid supports (1) but not (2). It would be good to support 
(2) as well, since while some third-party JDBC applications support both 
methods of specifying properties, some only support (2).
   
   This is something Avatica should be handling for us, but there is a bug that 
prevents it from working: https://issues.apache.org/jira/browse/CALCITE-4121.


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