[postgis-users] extra function?

[Bborie Park]

I'll do some experimenting when I'm done with my current work.

-bborie

On 02/22/2012 01:32 PM, Stephen Crawford wrote:
> Just tried it, same error and hint.
>
> -Steve
>
> On 2/22/2012 4:28 PM, Bborie Park wrote:
>> Steve,
>>
>> I know enough to do my own testing and make the necessary changes.
>> Until I have the time to do so, the following should work.
>>
>> CREATE OR REPLACE FUNCTION st_summarystats(rast raster,
>> exclude_nodata_value boolean)
>> RETURNS summarystats
>> AS $$ SELECT _st_summarystats($1, 1, $2, 1.) $$
>> LANGUAGE 'SQL' IMMUTABLE STRICT;
>>
>> -bborie
>>
>> On 02/22/2012 12:16 PM, Stephen Crawford wrote:
>>> Tried running it and get this:
>>>
>>> "ERROR: function _st_summarystats(raster, integer, boolean, integer) is
>>> not unique
>>> LINE 3: AS $$ SELECT _st_summarystats($1, 1::int, $2, 1) $$
>>> ^
>>> HINT: Could not choose best candidate function. You might need to add
>>> explicit type casts"
>>>
>>> -Steve
>>>
>>> On 2/22/2012 1:59 PM, Bborie Park wrote:
>>>> Interesting. Can you run the following and try again?
>>>>
>>>> CREATE OR REPLACE FUNCTION st_summarystats(rast raster,
>>>> exclude_nodata_value boolean)
>>>> RETURNS summarystats
>>>> AS $$ SELECT _st_summarystats($1, 1::int, $2, 1) $$
>>>> LANGUAGE 'SQL' IMMUTABLE STRICT;
>>>>
>>>> If that removes the HINT, I'll make the appropriate changes to the
>>>> code.
>>>>
>>>> -bborie
>>>>
>>>> On 02/22/2012 10:48 AM, Stephen Crawford wrote:
>>>>> I only tried the casting because of the messages I get, on of which
>>>>> is:
>>>>>
>>>>> "function _st_summarystats($1, 1, $2, 1) is not unique"
>>>>> and
>>>>> "HINT: Could not choose best candidate function. You might need to add
>>>>> explicit type casts"
>>>>>
>>>>> Thanks,
>>>>> steve
>>>>>
>>>>>
>>>>>
>>>>> On 2/22/2012 1:41 PM, Bborie Park wrote:
>>>>>> Hey Steve,
>>>>>>
>>>>>> _st_summarystats is an underlying function that isn't meant for
>>>>>> use by
>>>>>> end-users. ST_SummaryStats is what you should be using.
>>>>>>
>>>>>> The example query you provided shouldn't have any issues and
>>>>>> shouldn't
>>>>>> be creating any of those messages. In your situation, you don't even
>>>>>> need the true::boolean.
>>>>>>
>>>>>> -bborie
>>>>>>
>>>>>> On 02/22/2012 10:34 AM, Stephen Crawford wrote:
>>>>>>> Should I have both _st_summarystats and st_summarystats in my
>>>>>>> database?
>>>>>>> I get messages like "function not unique" and "could not choose best
>>>>>>> candidate function" when doing this:
>>>>>>>
>>>>>>> SELECT rid, observation_date, ST_SummaryStats(rast::raster,
>>>>>>> true::boolean) FROM spring_ms WHERE observation_date = '2012-02-20';
>>>>>>>
>>>>>>> I expected to get 187 records (one for each tile).
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Steve
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

-- 
Bborie Park
Programmer
Center for Vectorborne Diseases
UC Davis
530-752-8380
bkpark at ucdavis.edu