The following bug has been logged online:
Bug reference: 3629
Logged by: zhuge
Email address: zhuge@Rinaix.cn
PostgreSQL version: 8.1.9
Operating system: Linux
Description: Memory Allocation Error
Details:
I wrote and compiled and linked a C function, add_float, which returns float
in C like following:
PG_FUNCTION_INFO_V1(add_float);
Datum
add_float(PG_FUNCTION_ARGS)
{
float arg = PG_GETARG_FLOAT8(0);
PG_RETURN_FLOAT8(arg + 10);
}
After having loaded it into database, executed the SQL command, "select
ad_float(2.90)", but one error occured. The error message is "Error: invalid
memory alloc request size 4294967290" .
However I changed the above function as following:
Datum
add_integer(PG_FUNCTION_ARGS)
{
int32 arg = PG_GETARG_INT32(0);
PG_RETURN_INT32(arg + 10);
}
and executed the SQL command, "select add_integer(5)", and the result is:
add_integer
----------
15
In another word, the function can NOT return float BUT return integer. Why?
Please help me.
Thank you very much.
