On Mon, Jan 4, 2016 at 4:51 PM, Robert Haas <robertmh...@gmail.com> wrote:

> On Mon, Jan 4, 2016 at 10:17 AM, Pavel Stehule <pavel.steh...@gmail.com>
> wrote:
> > [ new patch ]
>
> +         case '-':
> +             ereport(ERROR,
> +                     (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
> +                      errmsg("size cannot be negative")));
>
> Why not?  I bet if you copy any - sign to the buffer, this will Just Work.
>

I'm also inclined on dropping that explicit check for empty string below
and let numeric_in() error out on that.  Does this look OK, or can it
confuse someone:

postgres=# select pg_size_bytes('');
ERROR:  invalid input syntax for type numeric: ""

?

+         if ( conv->base_unit == GUC_UNIT_KB &&
>

Between "(" and "conv->..." I believe.

---
Alex

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