我在Cosmos DB Emulator中有一个存储过程。此过程所做的只是：从mycollection中删除所有文档。 当我在浏览器(https://localhost:8081/_explorer/index.html(中运行它时，它工作得很好。然后我尝试从Java调用它：
RequestOptions requestOptions = new RequestOptions();
requestOptions.setPartitionKey(new PartitionKey(null));
System.out.println("START DELETE PROCEDURE");
StoredProcedureResponse spr = client.executeStoredProcedure(sprocLink, requestOptions, null);
System.out.println(spr.getResponseAsString());
并得到以下结果：{"deleted": 0,"continuation": false}
这太疯狂了。我正在从浏览器运行此存储过程并得到以下结果：{"deleted": 10,"continuation": false}.然后(当然是加回这 10 个文档(从 Java 运行这个结果并得到这个结果：{"deleted": 0,"continuation": false}
因此，当存储过程由 Java 运行时，它被调用但没有完成工作。什么都没删。为什么会这样？
下面是存储过程
function testStoredProcedure( ) {
var collection = getContext().getCollection();
var collectionLink = collection.getSelfLink();
var response = getContext().getResponse();
var responseBody = {
deleted: 0,
continuation: true
};
var query = 'SELECT * FROM mycollection ';
// 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();
}
}
}
对于分区容器，执行存储过程时，必须在请求选项中提供分区键值。存储过程的作用域始终限定为分区键。具有不同分区键值的项对存储过程不可见。这也适用于触发器。
您在请求选项中将分区键设置为"null"。"null"是有效的分区键值。看起来"null"不是 10 个文档的分区键值。
谦虚地转发@Jay龚回答 如何在文档数据库 java SDK 中指定用于删除文档的 NONE 分区键？
也许它会帮助某人。放：
PartitionKey partitionKey = new PartitionKey(Undefined.Value());