ALTER TABLE {{p}}calendar_events
    ADD COLUMN dav_name VARCHAR(255),
    ADD COLUMN dav_data LONGTEXT;

ALTER TABLE {{p}}contacts
    ADD COLUMN dav_name VARCHAR(255),
    ADD COLUMN dav_data LONGTEXT;

DROP INDEX {{p}}idx_contacts_email ON {{p}}contacts;

CREATE INDEX {{p}}idx_contacts_email ON {{p}}contacts (email);

CREATE INDEX {{p}}idx_calendar_events_dav_name ON {{p}}calendar_events (dav_name);

CREATE INDEX {{p}}idx_contacts_dav_name ON {{p}}contacts (dav_name);