MongoDB C++ Driver mongocxx-3.7.0
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pipeline.hpp
1// Copyright 2014 MongoDB Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#pragma once
16
17#include <cstdint>
18#include <memory>
19#include <string>
20
21#include <bsoncxx/array/view.hpp>
22#include <bsoncxx/array/view_or_value.hpp>
23#include <bsoncxx/document/view.hpp>
24#include <bsoncxx/document/view_or_value.hpp>
25
26#include <mongocxx/config/prelude.hpp>
27
28namespace mongocxx {
29MONGOCXX_INLINE_NAMESPACE_BEGIN
30
31class client;
32class collection;
33class database;
34
38class MONGOCXX_API pipeline {
39 public:
46
50 pipeline(pipeline&&) noexcept;
51
55 pipeline& operator=(pipeline&&) noexcept;
56
61
76 pipeline& add_fields(bsoncxx::document::view_or_value fields_to_add);
77
92 pipeline& bucket(bsoncxx::document::view_or_value bucket_args);
93
109 pipeline& bucket_auto(bsoncxx::document::view_or_value bucket_auto_args);
110
124 pipeline& coll_stats(
125 bsoncxx::document::view_or_value coll_stats_args = bsoncxx::document::view{});
126
139 pipeline& count(std::string field);
140
157
173
190
207
222
237
257
268
281 pipeline& limit(std::int32_t limit);
282
297
311
327
342
357
372 pipeline& out(std::string collection_name);
373
387
402
417
431 pipeline& sample(std::int32_t size);
432
446 pipeline& skip(std::int32_t docs_to_skip);
447
461
480
499 pipeline& sort_by_count(std::string field_expression);
500
520
539 pipeline& unwind(std::string field_name);
540
545
546 private:
547 friend class client;
548 friend class collection;
549 friend class database;
550
551 class MONGOCXX_PRIVATE impl;
552 std::unique_ptr<impl> _impl;
553};
554
555MONGOCXX_INLINE_NAMESPACE_END
556} // namespace mongocxx
557
558#include <mongocxx/config/postlude.hpp>
A read-only, non-owning view of a BSON document.
Definition view.hpp:40
Class representing a client connection to MongoDB.
Definition client.hpp:58
Class representing server side document groupings within a MongoDB database.
Definition collection.hpp:83
Class representing a MongoDB database.
Definition database.hpp:43
Class representing a MongoDB aggregation pipeline.
Definition pipeline.hpp:38
pipeline & sample(std::int32_t size)
Randomly selects the specified number of documents that pass into the stage and passes the remaining ...
pipeline & append_stage(bsoncxx::document::view_or_value stage)
Appends a stage to this pipeline object.
pipeline & current_op(bsoncxx::document::view_or_value current_op_args)
Returns a stream of documents containing information on active and/or dormant operations as well as i...
pipeline & match(bsoncxx::document::view_or_value filter)
Filters the documents.
pipeline & facet(bsoncxx::document::view_or_value facet_args)
Processes multiple aggregation pipelines within a single stage on the same set of input documents.
pipeline(pipeline &&) noexcept
Move constructs a pipeline.
pipeline & group(bsoncxx::document::view_or_value group_args)
Groups documents by some specified expression and outputs to the next stage a document for each disti...
pipeline & unwind(bsoncxx::document::view_or_value unwind_args)
Deconstructs an array field from the input documents to output a document for each element.
pipeline & count(std::string field)
Returns a document containing a count of the number of documents input to the stage.
pipeline & sort_by_count(std::string field_expression)
Groups incoming documents based on the value of a specified expression, then computes the count of do...
bsoncxx::array::view view_array() const
pipeline & unwind(std::string field_name)
Deconstructs an array field from the input documents to output a document for each element.
pipeline & lookup(bsoncxx::document::view_or_value lookup_args)
Performs a left outer join to an unsharded collection in the same database to filter in documents fro...
pipeline & skip(std::int32_t docs_to_skip)
Skips over the specified number of documents that pass into the stage and passes the remaining docume...
pipeline & limit(std::int32_t limit)
Limits the number of documents passed to the next stage in the pipeline.
pipeline & geo_near(bsoncxx::document::view_or_value geo_near_args)
Outputs documents in order of nearest to farthest from a specified point.
pipeline & merge(bsoncxx::document::view_or_value merge_args)
Outputs the aggregation results to a collection.
pipeline & sort_by_count(bsoncxx::document::view_or_value field_expression)
Groups incoming documents based on the value of a specified expression, then computes the count of do...
pipeline & redact(bsoncxx::document::view_or_value restrictions)
Restricts the contents of the documents based on information stored in the documents themselves.
pipeline()
Creates a new aggregation pipeline.
pipeline & index_stats()
Returns statistics regarding the use of each index for the collection.
pipeline & list_sessions(bsoncxx::document::view_or_value list_sessions_args)
Lists all sessions stored in the system.sessions collection in the config database.
pipeline & graph_lookup(bsoncxx::document::view_or_value graph_lookup_args)
Performs a recursive search on a collection.
pipeline & append_stages(bsoncxx::array::view_or_value stages)
Appends stages to this pipeline object from the given bson array.
pipeline & list_local_sessions(bsoncxx::document::view_or_value list_local_sessions_args)
Lists the sessions cached in memory by the mongod or mongos instance.
pipeline & replace_root(bsoncxx::document::view_or_value replace_root_args)
Promotes a specified document to the top level and replaces all other fields.
pipeline & out(std::string collection_name)
Takes documents returned by the aggregation pipeline and writes them to a specified collection.
pipeline & project(bsoncxx::document::view_or_value projection)
Projects a subset of the fields in the documents to the next stage of the pipeline.
pipeline & sort(bsoncxx::document::view_or_value ordering)
Sorts all input documents and returns them to the pipeline in sorted order.
Top level namespace for MongoDB C++ BSON functionality.
Definition element.hpp:24
Top level namespace for the MongoDB C++ driver.
Definition bulk_write.hpp:24