Roman Kononov napsal(a):
> The following bug has been logged online:
>
> Bug reference: 4114
> Logged by: Roman Kononov
> Email address: kononov@dls.net
> PostgreSQL version: 8.3.1
> Operating system: x86_64 GNU/Linux
> Description: Inconsistent shift operator
> Details:
>
> The below test cases show the obvious inconsistency between different
> integer types.
>
> test=# \t
> Showing only tuples.
> test=# select 1::int2 << 17;
> 0
>
> test=# select 1::int4 << 33;
> 2
>
> test=# select 1::int8 << 65;
> 2
>
> test=# select 2::int2 >> 17;
> 0
>
> test=# select 2::int4 >> 33;
> 1
>
> test=# select 2::int8 >> 65;
> 1
It seems to be OK regarding how C shift operator works. Try
#include <stdio.h>
#include <inttypes.h>
void fce(int16_t arg1, int32_t arg2)
{
int16_t res = arg1 << arg2;
printf("result: %i\n", res);
}
int main()
{
fce(1,17);
return 0;
}
Zdenek
