On Mon, Apr 8, 2013 at 11:44 AM, Rodrigo Barboza <rodrigombu...@gmail.com>wrote:
>
>
>
> On Mon, Apr 8, 2013 at 11:27 AM, Rodrigo Barboza
> <rodrigombu...@gmail.com>wrote:
>
>>
>>
>> On Mon, Apr 8, 2013 at 11:25 AM, Tom Lane <t...@sss.pgh.pa.us> wrote:
>>
>>> Rodrigo Barboza <rodrigombu...@gmail.com> writes:
>>> > UPDATE tm32 SET a = a + 1 WHERE a > $i;
>>> > ERROR: unsupported type: 202886
>>>
>>> I'm betting that's coming from scalargtsel, which doesn't know anything
>>> about your type, but you've nominated it to be the selectivity function
>>> for ">" anyway.
>>>
>>> /*
>>> * Can't get here unless someone tries to use
>>> scalarltsel/scalargtsel on
>>> * an operator with one numeric and one non-numeric operand.
>>> */
>>> elog(ERROR, "unsupported type: %u", typid);
>>>
>>> regards, tom lane
>>>
>>
>>
>> Yes, I found it in the code, but I followed the example from the postgres
>> documentation that uses this function.
>> And why does it work sometimes? Why not other times?
>>
>>
>
> Here is a very simple case and weird behavior. I select * from a table and
> returns 4 entries.
> But when I run with a filter the error raises and crazy values are printed
> from the params.
>
> Here is my funcitons where I compare the values:
>
> typedef uint32_t TmUInt32;
>
> static int
> tmuint32_int32_abs_cmp_internal(TmUInt32 a, int32_t b)
> {
> int ret;
> elog(NOTICE, "funcao:%s linha:%d\n", *_FUNCTION_*, *_LINE_*);
> if (a < b) ret = -1;
> else if (a > b) ret = 1;
> else ret = 0;
> elog(NOTICE, "funcao:%s linha:%d, ret: %d a: %u\n", *_FUNCTION_*, *_LINE_*,
> ret, a);
> return ret;
> }
>
> PG_FUNCTION_INFO_V1(tmuint32_int32_abs_gt);
>
> Datum
> tmuint32_int32_abs_gt(PG_FUNCTION_ARGS)
> {
> TmUInt32 *param1;
> int32_t param2;
> elog(NOTICE, "funcao:%s linha:%d\n", *_FUNCTION_*, *_LINE_*);
>
> if(PG_ARGISNULL(0) || PG_ARGISNULL(1)) PG_RETURN_NULL();
>
> param1 = (TmUInt32 *) PG_GETARG_POINTER(0);
> param2 = DatumGetInt32(PG_GETARG_DATUM(1));
>
> elog(NOTICE, "funcao:%s linha:%d param1: %u, param2: %d\n", *_FUNCTION_*,
> *_LINE_*, *param1, param2);
> PG_RETURN_BOOL(tmuint32_int32_abs_cmp_internal(*param1, param2) > 0);
> }
>
>
> And here is the simple test.
>
> -- SIMPLE QUERY
> select * from a;
>
> NOTICE: funcao:tmuint32_out linha:191
>
> NOTICE: funcao:tmuint32_out linha:191
>
> NOTICE: funcao:tmuint32_out linha:191
>
> NOTICE: funcao:tmuint32_out linha:191
>
> a
> ---
> 0
> 1
> 2
> 3
> (4 rows)
>
>
> _________________________________________________________________
>
> -- QUERY WHITH FILTER
> select * from a where a > 1;
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 0, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: -1 a: 0
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 99, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 1 a: 99
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 50, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 1 a: 50
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 24, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 1 a: 24
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 12, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 1 a: 12
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 6, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 1 a: 6
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 2, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 1 a: 2
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1296
>
> NOTICE: funcao:tmuint32_int32_abs_gt linha:1303 param1: 1, param2: 1
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:742
>
> NOTICE: funcao:tmuint32_int32_abs_cmp_internal linha:746, ret: 0 a: 1
>
> ERROR: unsupported type: 220200
>
>
I found that the problem is in the highlithed line. I'm getting the wrong
value from param1. But why this behavior?
PG_FUNCTION_INFO_V1(tmuint32_int32_abs_gt);
Datum
tmuint32_int32_abs_gt(PG_FUNCTION_ARGS)
{
TmUInt32 *param1;
int32_t param2;
elog(NOTICE, "funcao:%s linha:%d\n", *_FUNCTION_*, *_LINE_*);
if(PG_ARGISNULL(0) || PG_ARGISNULL(1)) PG_RETURN_NULL();
param1 = (TmUInt32 *) PG_GETARG_POINTER(0);
param2 = DatumGetInt32(PG_GETARG_DATUM(1));
elog(NOTICE, "funcao:%s linha:%d param1: %u, param2: %d\n", *_FUNCTION_*, *
_LINE_*, *param1, param2);
PG_RETURN_BOOL(tmuint32_int32_abs_cmp_internal(*param1, param2) > 0);
}
