Function findTypeAnalyzeFunction

src/backend/commands/typecmds.c:2345–2370

}

static Oid
findTypeAnalyzeFunction(List *procname, Oid typeOid)
{
	Oid			argList[1];
	Oid			procOid;

	/*
	 * Analyze functions always take one INTERNAL argument and return bool.
	 */
	argList[0] = INTERNALOID;

	procOid = LookupFuncName(procname, 1, argList, true);
	if (!OidIsValid(procOid))
		ereport(ERROR,
				(errcode(ERRCODE_UNDEFINED_FUNCTION),
				 errmsg("function %s does not exist",
						func_signature_string(procname, 1, NIL, argList))));

	if (get_func_rettype(procOid) != BOOLOID)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
				 errmsg("type analyze function %s must return type %s",
						NameListToString(procname), "boolean")));

	return procOid;
}

static Oid
findTypeSubscriptingFunction(List *procname, Oid typeOid)