Function canOptimizeExpression

packages/db/src/utils/index-optimization.ts:239–264

(expression: BasicExpression, collection: CollectionLike<T, TKey>)

 * Checks if an expression can be optimized
 */
export function canOptimizeExpression<
  T extends object,
  TKey extends string | number,
>(expression: BasicExpression, collection: CollectionLike<T, TKey>): boolean {
  if (expression.type === `func`) {
    switch (expression.name) {
      case `eq`:
      case `gt`:
      case `gte`:
      case `lt`:
      case `lte`:
        return canOptimizeSimpleComparison(expression, collection)

      case `and`:
        return canOptimizeAndExpression(expression, collection)

      case `or`:
        return canOptimizeOrExpression(expression, collection)

      case `in`:
        return canOptimizeInArrayExpression(expression, collection)
    }
  }

  return false
}

/**
 * Result of compound range optimization, including which AND arguments