ALTER TABLE {{p}}calendar_events
    ADD COLUMN dav_name TEXT,
    ADD COLUMN dav_data TEXT;

ALTER TABLE {{p}}contacts
    ADD COLUMN dav_name TEXT,
    ADD COLUMN dav_data TEXT;

DROP INDEX IF EXISTS {{p}}idx_contacts_email;

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);