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antonmks / Alenka

GPU database engine
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Can I perform table join on varchar field? #36

Closed SquallChua closed 11 years ago

SquallChua commented 11 years ago

As per title can I perform table join on varchar field for Alenka? My attempt on it thus far failed with application crash anyway.

antonmks commented 11 years ago

It was supposed to work, but I haven't tested it with sorted merge. Seems like there is an issue with MGPU join when using 64 bit keys. I wrote to Sean so we have to wait to see what he will say about this.

antonmks commented 11 years ago

Ok, it is fixed. Make sure to re-download both Alenka and MGPU library.

SquallChua commented 11 years ago

Glad that join on varchar field work now. But I encounter problem when performing star join on varchar fields. Even though it works fine if I perform join operations separately.

antonmks commented 11 years ago

Right now star join works only on integers. It shouldn't be too difficult to add support for varchar star join though.