On 8/22/2013 1:31 AM, Ayesha Dissanayaka wrote:
I am a newbie to derby and I would like to try out improve performances of aggregate functions
Hi, and welcome to Derby! In the area of improvements to aggregate functions in Derby, you could consider working on the implementation of "window functions" in Derby. Window functions are part of modern standard SQL, are well-defined by the SQL standard, and there are other open source implementations of window functions that you can study and learn from, such as: https://www.pgcon.org/2009/schedule/attachments/98_Windowing%20Functions.pdf thanks, bryan
