Re: Testing castability of text to numeric

>
> I am trying to create a function that will test if a given text value
> may safely be cast to numeric, returning the numeric cast or null if
> impossible.
>
> Is there a way to "catch" the "ERROR:  Bad numeric input format"
error?
>
> I ask that rather than about what the numeric format is for
regex-style
> testing because if this works I may want to use a similar method to
> check if a given text value casts safely to other types, like date.
>
I don't know of any way to catch errors.
And I can't see any way how to test castability via regex. Can you?
The only way I can think of at the moment is writing a C function.

Regards, Christoph