Hi
-- Dirk Mika Software Developer mika:timing GmbH Strundepark - Kürtener Str. 11b 51465 Bergisch Gladbach Germany fon +49 2202 2401-1197 dirk.m...@mikatiming.de www.mikatiming.de AG Köln HRB 47509 * WEEE-Reg.-Nr. DE 90029884 Geschäftsführer: Harald Mika, Jörg Mika ## How2Use ## the ChampionChip by mika:timing ## https://youtu.be/qfOFXrpSKLQ Am 04.07.19, 10:50 schrieb "rob stone" <floripa...@gmail.com>: Why don't you define "ratified" as CHAR(1)? This will change the constraint to Check constraints: "ck_tp_ratified" CHECK (ratified IS NULL OR (ratified = ANY (ARRAY['Y'::bpchar, 'N'::bpchar]))) Less casting. ( Does the casting from one "String" type to another "String" type have any performance impact, btw? AFAIK, constraint evaluation is based upon the column's underlying data type. But isn't char and varchar all stored in the same data structure? Dirk
