How I can SUM column with condition?

[Marek]

Hi,

I want to SUM one column value between all objects that match the specified checks. SQL example:

SELECT SUM(column_name) FROM table WHERE year = 2014

My HyperDex database is huge and I don't want receive all objects (from year = 2014) and increment value in loop (in memory on client-side). I want get one long-integer value. It is possible to solve this issue in HyperDex (on server-side)?

[李俊良]

some patch could use sum one column

git commit : 8d8ca6781cdfa6b72869c466caa32f076576c43d

在 2014年10月15日星期三 UTC+8下午7:13:37，Marek写道：

[李俊良]

add missing files

在 2016年2月22日星期一 UTC+8下午12:38:39，李俊良写道：