Method fetch

packages/db/src/query-engine.ts:82–92

* A top-level fetch method that compiles a query and executes it.

(query: PreparedQuery, vars: any = {})

   * A top-level fetch method that compiles a query and executes it.
   */
  async fetch(query: PreparedQuery, vars: any = {}): Promise<ViewEntity[]> {
    const compiledPlan = compileQuery(structuredClone(query));
    const results = await this.executeSteps(compiledPlan.steps, {
      vars,
      viewPlans: compiledPlan.views,
    });
    if (Array.isArray(results)) {
      return results;
    }
    throw new InvalidResultCardinalityError('many', 'one');
  }

  private async executeSteps(
    steps: Step[],