Dear all,

I was wondering if it is possible to build a User Defined Aggregation in MonetDB.

For example, rather than do SUM(myfunction(a,b)) I would like to do MYAGG(a,b) where MYAGG internally holds a small buffer of a and b values so that they can be calculated in a batch fashion with a high performance batch implementation of the function.  

Could MYAGG be implemented in C?

Best regards,

Alastair