On Fri, Feb 01, 2008 at 11:31:37AM +0100, Enrico Sirola wrote: > Hello, > I'd like to perform linear algebra operations on float4/8 arrays. > These tasks are tipically carried on using ad hoc optimized libraries > (e.g. BLAS). In order to do this, I studied a bit how arrays are > stored internally by the DB: from what I understood, arrays are > basically a vector of Datum, and floating point numbers are stored by > reference into Datums. Well, arrays are not vectors of Datum, they are a vector of the objects they contain. When passed to a function floats, arrays and other by-ref types as passed by reference, but the array object itself does not contain references, it contains the actual objects. That doesn't necessarily make it the same as a C array though, the alignment considerations may be different. But at first glance certainly seems like an array would be in the right format for what you're doing. Have a nice day, -- Martijn van Oosterhout <kleptog@xxxxxxxxx> http://svana.org/kleptog/ > Those who make peaceful revolution impossible will make violent revolution inevitable. > -- John F Kennedy
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