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I'm seeing the TPC-DS results ending up at about 70% of prior runtime with most queries being somewhat improved with Blaze, but aggregate operators aren't presently supported. Given most of the TPC-DS queries do use aggregates and you're obviously aware of this, do you have any inclinations of how the absence of them might be affecting runtime (via e.g. stage durations, etc).
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I apologize for the delayed response to your question. As you mentioned, aggregate operators are currently not supported in Blaze, which may be affecting overall runtime for TPC-DS queries.
However, I do have good news to share. Since you asked this question, we have added support for aggregate operators in Blaze! This should improve the performance of TPC-DS queries and other workloads that rely on aggregate operations.
We are actively working to maintain community and will be releasing updates and new code soon.
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Has a new benchmark been run since adding aggregate operators?