hello
2013/2/1 Andrew Dunstan <andrew@dunslane.net>:
>
> What's the best way for me to find out if a given parameter of a function is
> a constant? The context is that it's expensive to process, and in most cases
> will in fact be a constant, so if it is in fact a constant I'd like to
> process it once and stash the results.
>
you can look into parser tree
see src of get_fn_expr_argtype(fcinfo->flinfo, 0);
Regards
Pavel
> cheers
>
> andrew
>
>
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