EstimateDocumentCount.ts•1.56 kB
// Copyright DataStax, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import { db } from "../util/db.js";
export async function EstimateDocumentCount(params: {
collectionName: string;
}) {
const { collectionName } = params;
const collection = db.collection(collectionName);
try {
// Try to use estimatedDocumentCount if available
if (typeof collection.estimatedDocumentCount === 'function') {
return await collection.estimatedDocumentCount();
} else {
// Last resort: get all documents and count them
const cursor = collection.find({});
// Handle the case when toArray is not available
if (!cursor || typeof cursor.toArray !== 'function') {
console.warn(`cursor.toArray is not available for collection '${collectionName}'`);
return 0;
}
const documents = await cursor.toArray();
return documents.length;
}
} catch (error) {
console.error(`Error estimating document count for collection '${collectionName}':`, error);
return 0;
}
}