balderdashy/sails-mysql — pull request #52 by zzhouj (2013-10-26 15:03:39+00:00)
Title: support SUM(col1*col2) AS col1

With this patch, user can write sum clause like below:
```javascript
Model.find()
.where(...)
.sum({sum: 'col1*col2', as: 'col1'})
// OR
.sum([{sum: 'col1*col2', as: 'col1'}, {sum: 'col3/col4', as: 'col3'}])
.exec(function (err, models) {
...
});
```