[Monetdb-developers] group by on BATs

Charalampos Nikolaou charnik at di.uoa.gr
Fri Dec 30 12:23:55 CET 2011


I have three BATs and I would like to create groups of pairs from the
first two BATs and take the bitwise and for the tail values of each
group according to the third BAT. I saw that there is a module for
grouping operations in monetdb5/modules/kernel/group.mx. Is it the
right one for my purpose? For the case of bitwise and is there any
function that I could use or I should write my own like for example
the GRPaggr_count() function in that file.


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