-- +goose Up
ALTER TABLE teams
    ADD COLUMN captain_email TEXT NOT NULL DEFAULT '',
    ADD COLUMN participants_count INTEGER NOT NULL DEFAULT 0 CHECK (participants_count >= 0),
    ADD COLUMN registration_delivery_id TEXT,
    ADD CONSTRAINT teams_registration_delivery_unique UNIQUE (game_id, registration_delivery_id);

-- +goose Down
ALTER TABLE teams
    DROP CONSTRAINT teams_registration_delivery_unique,
    DROP COLUMN registration_delivery_id,
    DROP COLUMN participants_count,
    DROP COLUMN captain_email;