Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/200#issuecomment-59467650
Hi @mvhlong,
Why don't you make a separate histogram implementation for each type? We
may need only three implementations for Long, Double, and byte []. They will
cover all value types. I think that this approach would be good in practice.
I have another question. Your proposed histogram implementation takes a
list of Double values. Does this approach takes all values at a time?
Otherwise, can we build a histogram in an incremental way?
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