chenhao7253886 commented on issue #676: New SQL Optimizer URL: https://github.com/apache/incubator-doris/issues/676#issuecomment-468259484 New SQL Optimizer will be a option with old optimizer at early stage and it will replace the old in the end. Firstly we will implement cost-based optimizer framework and it can optimize plan tree processed by old impala heuristic optimizer. Secondly we will implement a new heuristic optimizer to replace Impala's optimizer completely and add statistics for cost. Thirdly we will support some queries that Doris does not support in tpcds under the framework. It will take a long time and we will try to make sure that every stage is available.
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