"Michael Enke" <[EMAIL PROTECTED]> writes:
> I created a C function:
> extern Datum test_arg(PG_FUNCTION_ARGS);
> PG_FUNCTION_INFO_V1(test_arg);
> Datum test_arg(PG_FUNCTION_ARGS) {
> elog(INFO, "arg: %s", VARDATA(PG_GETARG_TEXT_P(0)));
> PG_RETURN_INT16(0);
The VARDATA of a TEXT datum is not a C string; in particular it is not
guaranteed to be null-terminated. This is an error in your code not
a bug.
The usual way to get a C string from a TEXT datum is to call textout,
eg
str = DatumGetCString(DirectFunctionCall1(textout, datumval));
regards, tom lane
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TIP 6: explain analyze is your friend
