Function isExpressionLike

packages/db/src/query/ir.ts:218–255

(value: any)

 * Prefer this over ad-hoc local implementations to keep behavior consistent.
 */
export function isExpressionLike(value: any): boolean {
  if (
    value instanceof Aggregate ||
    value instanceof ConditionalSelect ||
    value instanceof Func ||
    value instanceof PropRef ||
    value instanceof Value ||
    value instanceof IncludesSubquery
  ) {
    return true
  }

  if (!value || typeof value !== `object`) {
    return false
  }

  if (value.type === `conditionalSelect`) {
    return Array.isArray(value.branches)
  }

  if (value.type === `agg` || value.type === `func`) {
    return typeof value.name === `string` && Array.isArray(value.args)
  }

  if (value.type === `ref`) {
    return Array.isArray(value.path)
  }

  if (value.type === `val`) {
    return `value` in value
  }

  if (value.type === `includesSubquery`) {
    return `query` in value && `fieldName` in value
  }

  return false
}

/**
 * Helper functions for working with Where clauses