Richard Huxton wrote:
> Markus Bertheau wrote:
> > Hi,
> > 
> > is there a non-implementation reason as to why there are no expressions
> > allowed in the arguments to the format string to RAISE, or is that just
> > not implemented yet?
> 
> Just not done yet AFAIK. It would require some changes to the parser for 
>   plpgsql, but nothing too extreme. Might make a good project for 
> someone learning more about PG's code.

TODO has:

        o Allow PL/PgSQL's RAISE function to take expressions

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