SimpleCloudNotifier/scnserver/db/schema/primary_migration_3_4.ddl

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DROP INDEX idx_messages_owner_channel;
DROP INDEX idx_messages_owner_channel_nc;
DROP INDEX idx_messages_idempotency;
CREATE UNIQUE INDEX "idx_messages_idempotency" ON messages (sender_user_id, usr_message_id COLLATE BINARY);
DROP INDEX idx_messages_usedkey;
CREATE INDEX "idx_messages_usedkey" ON messages (sender_user_id, used_key_id);
ALTER TABLE messages DROP COLUMN owner_user_id;