Esproc, Data, Data Analysis, Development, Esproc Spl.
when calculating in-group TopN, resulting in a sharp drop in performance (whatever, we don’t have the source code to confirm) and making the optimizer fail. Then, how SPL solve these? For the first example: Stock.sort(TradeDate).group@i(Price<Price[-1]).max(~.len()) SPL provides ordered grouping.