Re: Transform for pl/perl

On 2018-May-17, Peter Eisentraut wrote:

> The items that are still open from the original email are:
> 
> 2) jsonb scalar values are passed to the plperl function wrapped in not
>    one, but _two_ layers of references
> 
> 3) jsonb numeric values are passed as perl's NV (floating point) type,
>    losing precision if they're integers that would fit in an IV or UV.
> 
> #2 appears to be a quality of implementation issue without any
> user-visible effects.
> 
> #3 is an opportunity for future improvement, but works as intended right
> now.
> 
> I think patches for these issues could still be considered during beta,
> but they are not release blockers IMO.

It appears to me that item #2 definitely would need to be fixed before
release, so that it doesn't become a backwards-incompatibility later on.

I'm not sure I agree that #3 is just a future feature.  If you have
functions working with jsonb numeric giving exact results, and later
enable transforms for plperl, then your function starts giving inexact
results?  Maybe I misunderstand the issue but this doesn't sound great.

Anyway, please let's move this forward.  Peter, you own this item.
Anthony and ilmari, if you can help by providing a patch, I'm sure
that'll be appreciated.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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