Active Subscription Lookup
The dashboard often looks in subscriptions for a user's active subscription by user_id, and active rows are fewer than archived ones. Create a compact partial index on user_id only for rows with status = 'active'.
Speed this query up with an index
CREATE INDEX ix_subs_active_user ON subscriptions (user_id) WHERE status = 'active'
Solo CREATE/ALTER/DROP — no hace falta un SELECT al final.
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