ALTER TABLE local.local_contents
    ADD COLUMN IF NOT EXISTS status SMALLINT NOT NULL DEFAULT 1,
    ADD COLUMN IF NOT EXISTS published_at TIMESTAMPTZ NULL,
    ADD COLUMN IF NOT EXISTS published_by uuid NULL,
    ADD COLUMN IF NOT EXISTS display_start_at TIMESTAMPTZ NULL,
    ADD COLUMN IF NOT EXISTS display_end_at TIMESTAMPTZ NULL;

CREATE INDEX IF NOT EXISTS idx_local_contents_status
    ON local.local_contents (status, collected_at DESC)
    WHERE deleted = false;