Github user jianqiao commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/257#discussion_r122325834
--- Diff: query_optimizer/PhysicalGenerator.cpp ---
@@ -176,6 +177,8 @@ P::PhysicalPtr PhysicalGenerator::optimizePlan() {
rules.emplace_back(new AttachLIPFilters());
}
+ rules.push_back(std::make_unique<Partition>(optimizer_context_));
--- End diff --
Is it okay to move this rule before the two LIP-related rules? Currently
the LIP information may be invalidated (and lead to incorrect results) if tree
transformation happens after the two LIP passes.
Meanwhile, better add some comments describing what additional information
would be added into the physical nodes after this pass.
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