Queries ALTER TABLE APDBAdInstance ADD COLUMN schema; ALTER TABLE APDBAdInstance ADD COLUMN sessionId; ALTER TABLE APDBEvent ADD COLUMN expirationTime REAL; DROP INDEX idx_event_timestamp; CREATE INDEX idx_event_timestamp_expirationTime ON APDBEvent (timestamp, expirationTime); ALTER TABLE APDBAdInstance ADD COLUMN accountToken_new TEXT DEFAULT NULL; UPDATE APDBAdInstance SET accountToken_new = accountToken; ALTER TABLE APDBAdInstance DROP COLUMN accountToken; ALTER TABLE APDBAdInstance RENAME COLUMN accountToken_new TO accountToken;