-- Migration 1018: Preserve a trace from Economy Time Queue to the local order draft.
-- A time entry must leave the queue when a local draft has been created, while
-- still remaining available to the separate order/export workflow.

ALTER TABLE tmodule_times
    ADD COLUMN IF NOT EXISTS economy_order_draft_id INTEGER
        REFERENCES ordre_drafts(id) ON DELETE SET NULL,
    ADD COLUMN IF NOT EXISTS economy_settled_at TIMESTAMP,
    ADD COLUMN IF NOT EXISTS economy_settled_by INTEGER
        REFERENCES users(user_id) ON DELETE SET NULL;

CREATE INDEX IF NOT EXISTS idx_tmodule_times_economy_order_draft
    ON tmodule_times(economy_order_draft_id)
    WHERE economy_order_draft_id IS NOT NULL;

COMMENT ON COLUMN tmodule_times.economy_order_draft_id IS
    'Local ordrekladde created by Economy Time Queue. Prevents a duplicate draft for the same time.';