Github user zuyu commented on the issue: https://github.com/apache/incubator-quickstep/pull/122 @jianqiao No, [the distributed unit tests](https://github.com/apache/incubator-quickstep/blob/master/query_optimizer/tests/DistributedExecutionGeneratorTestRunner.cpp#L127) uses the same optimizer as the single node version. And since it works for the single node, it should work for the distributed one. I will debug myself. FYI, like what you did in `OptimizerTextTest`, I tried to disable it in the distributed unit tests, but no luck.
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