Re: multiple paramters in aggregate function

Sim Zacks wrote:
> According to the documentation, you can pass multiple parameters into an
> aggregate function, but it only stores one value.
>
>
> What I am trying to do is sum a quantity field, but it also has units
> that need to be converted.

Have you seen Martijn van Oosterhout's tagged types?

http://svana.org/kleptog/pgsql/taggedtypes.html

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Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.