Question

删除集合中所有文档的查询或其他快速方法是什么？现在我正在删除整个集合并重新创建。

Answer 1

查询或其他一些快速删除集合中所有文档的方法是什么？

正如Chris Pietschmann所说，目前Azure门户网站上不支持它，而且Azure {{p>

正在对此feature进行评估。

我们可以使用服务器端脚本（例如存储过程，udfs，触发器）来做到这一点我从另一个SO thread获得以下代码。它在我身边正常工作。

/**
 * A DocumentDB stored procedure that bulk deletes documents for a given query.<br/>
 * Note: You may need to execute this sproc multiple times (depending whether the sproc is able to delete every document within the execution timeout limit).
 *
 * @function
 * @param {string} query - A query that provides the documents to be deleted (e.g. "SELECT * FROM c WHERE c.founded_year = 2008")
 * @returns {Object.<number, boolean>} Returns an object with the two properties:<br/>
 *   deleted - contains a count of documents deleted<br/>
 *   continuation - a boolean whether you should execute the sproc again (true if there are more documents to delete; false otherwise).
 */
function bulkDeleteSproc(query) {
    var collection = getContext().getCollection();
    var collectionLink = collection.getSelfLink();
    var response = getContext().getResponse();
    var responseBody = {
        deleted: 0,
        continuation: true
    };

    // Validate input.
    if (!query) throw new Error("The query is undefined or null.");

    tryQueryAndDelete();

    // Recursively runs the query w/ support for continuation tokens.
    // Calls tryDelete(documents) as soon as the query returns documents.
    function tryQueryAndDelete(continuation) {
        var requestOptions = {continuation: continuation};

        var isAccepted = collection.queryDocuments(collectionLink, query, requestOptions, function (err, retrievedDocs, responseOptions) {
            if (err) throw err;

            if (retrievedDocs.length > 0) {
                // Begin deleting documents as soon as documents are returned form the query results.
                // tryDelete() resumes querying after deleting; no need to page through continuation tokens.
                //  - this is to prioritize writes over reads given timeout constraints.
                tryDelete(retrievedDocs);
            } else if (responseOptions.continuation) {
                // Else if the query came back empty, but with a continuation token; repeat the query w/ the token.
                tryQueryAndDelete(responseOptions.continuation);
            } else {
                // Else if there are no more documents and no continuation token - we are finished deleting documents.
                responseBody.continuation = false;
                response.setBody(responseBody);
            }
        });

        // If we hit execution bounds - return continuation: true.
        if (!isAccepted) {
            response.setBody(responseBody);
        }
    }

    // Recursively deletes documents passed in as an array argument.
    // Attempts to query for more on empty array.
    function tryDelete(documents) {
        if (documents.length > 0) {
            // Delete the first document in the array.
            var isAccepted = collection.deleteDocument(documents[0]._self, {}, function (err, responseOptions) {
                if (err) throw err;

                responseBody.deleted++;
                documents.shift();
                // Delete the next document in the array.
                tryDelete(documents);
            });

            // If we hit execution bounds - return continuation: true.
            if (!isAccepted) {
                response.setBody(responseBody);
            }
        } else {
            // If the document array is empty, query for more documents.
            tryQueryAndDelete();
        }
    }
}

Azure门户网站上的更多详细步骤如下：

检查集合中的文档数

在集合中创建产品商店

检查集合中的所有文档是否已删除

Answer 2

在测试环境中，我们发现了将TTL设置为1秒，等待cosmosdb完成其工作，然后将TTL恢复为正常状态的技巧。

幸运的是，这可以在Azure门户中完成。

在后台，Cosmosdb会删除所有文档本身，但这确实需要时间。

示例：如果集合中有1000个文档，并且ttl已关闭

select count(1) from c = 1000

设置TTL = 1秒

select count(1) from c = 0

但是，如果重新打开普通TTL并在其有时间删除背景中的所有文档之前进行计数，则得到的数字与将TTL设置为1秒之前的数字相同。将它们全部删除在后台需要花费时间。

Answer 3

使查询返回自链接+分区键（此处= company.id），然后删除每个文档

protected async Task DeleteAllDocumentsAsync()
    {
        DocumentClient client = createClient();
        //**make query that returns selflink + partition key (here= company.id)**
        var docs = client.CreateDocumentQuery("your collection uri", "select c._self, c.company.id from c", new FeedOptions() {EnableCrossPartitionQuery = true}).ToList();

        foreach (var doc in docs)
        {
            var requestOptions = new RequestOptions() {PartitionKey = new PartitionKey(doc.id)};
            await client.DeleteDocumentAsync(doc._self, requestOptions);
        }
    }

Answer 4

目前，您正在执行的方法是通过Azure门户执行此操作的唯一方法。您可能希望使用脚本或编码来实现一个工具来为您删除集合，而不是删除集合来完成它。

Answer 5

找到了从Azure门户执行此操作的黑客。

在容器设置下，打开生存时间并将时间设置为较小的数字（10秒）。
单击“保存”。项目将为deleted in the background，并且会花费一些时间（取决于容器中的数据量）。您可以注意Data Size field under metrics，以确保删除了所有数据。
关闭生存时间。

如何通过Query Explorer清除DocumentDB中的集合

5 个答案: