Function funcname_signature_string

src/backend/parser/parse_func.c:2047–2078

* funcname_signature_string * Build a string representing a function name, including arg types. * The result is something like "foo(integer)". * * If argnames isn't NIL, it is a list of C strings representing the actual * arg names for the last N arguments. This must be considered part of the * function signature too, when dealing with named-notation function calls. * * This is typicall

 * messages.
 */
const char *
funcname_signature_string(const char *funcname, int nargs,
						  List *argnames, const Oid *argtypes)
{
	StringInfoData argbuf;
	int			numposargs;
	ListCell   *lc;
	int			i;

	initStringInfo(&argbuf);

	appendStringInfo(&argbuf, "%s(", funcname);

	numposargs = nargs - list_length(argnames);
	lc = list_head(argnames);

	for (i = 0; i < nargs; i++)
	{
		if (i)
			appendStringInfoString(&argbuf, ", ");
		if (i >= numposargs)
		{
			appendStringInfo(&argbuf, "%s => ", (char *) lfirst(lc));
			lc = lnext(argnames, lc);
		}
		appendStringInfoString(&argbuf, format_type_be(argtypes[i]));
	}

	appendStringInfoChar(&argbuf, ')');

	return argbuf.data;			/* return palloc'd string buffer */
}

/*
 * func_signature_string