Hi All, It's been a while since Pinot has moved to SQL compliant syntax and semantics. Calcite SQL compiler has allowed us to move to standard SQL syntax and we will continue to leverage it for parsing, compiling and optimizing queries as more complex query functionality is added.
However, with legacy PQL code existing, we need to put double effort when adding new query functionality to ensure it works for both PQL and SQL. It hurts dev productivity. Since SQL is the path forward, we need to start removing PQL from Pinot codebase. Please see this issue created in August last year https://github.com/apache/incubator-pinot/issues/5807 proposing deprecation of PQL. As a first step, we would be removing the PQL query endpoint on broker (/query) and controller (/pql) by end of Feb. This will ensure that users can't use PQL to query Pinot. The follow-up cleanup of PQL from the engine (parser, execution engine) will be a subsequent task. Please let us know if you have any questions. Thanks Sidd
