Re: WIP: RangeTypes

On 30 January 2011 21:33, Jeff Davis <pgsql(at)j-davis(dot)com> wrote:
> [ trying a third time to send this message, apparently there were
> infrastructure problems before ]
>
> On Sun, 2011-01-30 at 02:55 +0000, Thom Brown wrote:
>> postgres=# select '[18,20]'::numrange @> 19;
>> ERROR:  operator does not exist: numrange @> integer
>> LINE 1: select '[18,20]'::numrange @> 19;
>>                                    ^
>> HINT:  No operator matches the given name and argument type(s). You
>> might need to add explicit type casts.
>
> It's because it doesn't know the type on the right side, and assumes
> it's an int4.
>
>    select '[18,20]'::numrange @> 19.0;
>
> works.

My misapprehension stems from the assumption that the
anyrange,anynonarray entry for the @> operator, and the
contains(anyrange, anynonarray) function would resolve since numrange
is a subset of anyrange and int4 is a subset of anynonarray.
Obviously it shouldn't work as the underlying type of the range isn't
an integer, but just trying to understand how the error message came
about.

--
Thom Brown
Twitter: @darkixion
IRC (freenode): dark_ixion
Registered Linux user: #516935