Re: Determining the type of an obkect in plperl

On Wed, Mar 4, 2020 at 4:21 PM stan <stanb(at)panix(dot)com> wrote:

> Probably a bit off topic, but I suspect someone on this list knows how to
> do
> this.
>
> I am in the process of writing a plperl function. In this function I need
> to compare the data in the NEW versus OLD structures. I am writing this as
> a
> generic subroutine, so I am looping through and comparing the 2 to see what
> is different. Problem is, that I need to know whether to us n != or a ne
> comparison.
>
> how can I determine what the data type of the value element is?
>

Not up to speed on Perl but you basically want everything to be done using
string equality - can't you just use "ne" everywhere and not worry about
comparing numbers using string comparison logic? Might want to disabled
warnings...

That would have to be faster than executing a type_of function on every
single column.

Then measure performance and decide whether a generic routine is performant
enough. If not you might try creating custom function dynamically using
the catalogs as input.

David J.