Hyunsik Choi created TAJO-1031:
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Summary: Avg function should be one rewrite rule of sum / count
instead of a specialized function
Key: TAJO-1031
URL: https://issues.apache.org/jira/browse/TAJO-1031
Project: Tajo
Issue Type: Improvement
Reporter: Hyunsik Choi
Priority: Minor
In our design, all EvalNodes and functions return only one result. But, only
Avg function is defined as a specialized function which returns two results:
count and sum. Avg function is inconsistent with the system. We have kept some
exception cases because of only Avg.
I think that this approach is not good. It would make our function and EvalNode
system more consistent if we change current Avg to one rewrite rule.
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