Re: [HACKERS] Mysterious Bus Error with get_fn_expr_argtype()

[David E. Wheeler]

On Sep 2, 2008, at 10:43, David E. Wheeler wrote:

Looks like regtype displays as an integer. So how about  
pg_regtypeof() and pg_typeof()?

Sorry, make that:

PG_FUNCTION_INFO_V1(pg_regtypeof);

Datum
pg_regtypeof(PG_FUNCTION_ARGS)
{
    PG_RETURN_OID(get_fn_expr_argtype(fcinfo->flinfo, 0));
}

PG_FUNCTION_INFO_V1(pg_typeof);

Datum
pg_typeof(PG_FUNCTION_ARGS)
{
    Oid    typeoid;

    typeoid = get_fn_expr_argtype(fcinfo->flinfo, 0);
    if (typeoid == InvalidOid) {
        ereport(
            ERROR, (
                errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                errmsg("could not determine data type of argument to  
pg_typeof()")
            )
        );
    }

	PG_RETURN_DATUM(DirectFunctionCall1(textin,  
CStringGetDatum(format_type_be(typeoid))));
}

Best,

David


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