db-schema/db_scripts/diff/10331.up

USE provisioning;

INSERT INTO language_strings (code, language, string) VALUES ('Client.Voip.ExistingWebUser', 'en', 'This webuser is already in use.');
INSERT INTO language_strings (code, language, string) VALUES ('Client.Voip.ExistingWebUser', 'de', 'Dieser Webuser ist nicht mehr verfügbar.');
INSERT INTO language_strings (code, language, string) VALUES ('Client.Voip.ExistingWebUser', 'es', 'This webuser is already in use.');
INSERT INTO language_strings (code, language, string) VALUES ('Client.Voip.ExistingWebUser', 'fr', 'This webuser is already in use.');

-- need to check if there are duplicates in voip_subscribers.webusername and
-- suffix them with with "-"voip_subscribers.id before createing unique constraint (see below)
CREATE OR REPLACE VIEW webusername_dupes_view
AS select webusername, count(*) c from voip_subscribers group by webusername having c > 1;

UPDATE voip_subscribers
SET voip_subscribers.webusername = CONCAT(voip_subscribers.webusername, '-', voip_subscribers.id)
WHERE
voip_subscribers.webusername IN (
    SELECT webusername FROM webusername_dupes_view
);

DROP VIEW webusername_dupes_view;

-- its safe now to make voip_subscribers.webusername unique
ALTER TABLE voip_subscribers ADD CONSTRAINT UNIQUE KEY `webuser_dom_idx` (`webusername`,`domain_id`);