name: upsell_expansion
display_name: Upsell & Expansion Revenue
category: sales
type: sum
unit: USD
grain: monthly
table: subscriptions
expression: "SUM(delta_mrr)"
time_column: billing_date
description: "Upsell & Expansion MRR — incremental recurring revenue gained from existing customers upgrading or expanding their subscriptions."
dimensions:
  - plan_type
  - region
synonyms:
  - expansion_mrr
  - upsell_revenue
  - expansion_revenue
notes:
  - "Only includes positive MRR changes (upgrades, seat additions, add-ons)"
  - "Excludes new business — filter on customers with prior active subscriptions"
  - "Negative expansion (downgrades) is tracked separately as contraction MRR"
sql: |
  SELECT
      DATE_TRUNC('month', billing_date) AS month,
      SUM(delta_mrr) AS expansion_mrr
  FROM subscriptions
  WHERE change_type IN ('upgrade', 'expansion', 'seat_add')
    AND delta_mrr > 0
  GROUP BY 1
  ORDER BY 1