Function computeRoutingKey

packages/db/src/query/live/collection-config-builder.ts:1799–1805

* Computes a composite routing key from correlation key and parent context. * When parentContext is null (no parent filters), returns the raw correlationKey * for zero behavioral change on existing queries.

(
  correlationKey: unknown,
  parentContext: Record<string, any> | null,
)

 * for zero behavioral change on existing queries.
 */
function computeRoutingKey(
  correlationKey: unknown,
  parentContext: Record<string, any> | null,
): unknown {
  if (parentContext == null) return correlationKey
  return JSON.stringify([correlationKey, parentContext])
}

/**
 * Creates a child Collection entry for includes subqueries.