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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 
28 namespace mongocxx {
29 MONGOCXX_INLINE_NAMESPACE_BEGIN
30 
31 class client;
32 class collection;
33 class database;
34 
38 class 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 
555 MONGOCXX_INLINE_NAMESPACE_END
556 } // namespace mongocxx
557 
558 #include <mongocxx/config/postlude.hpp>
mongocxx::pipeline::list_sessions
pipeline & list_sessions(bsoncxx::document::view_or_value list_sessions_args)
Lists all sessions stored in the system.sessions collection in the config database.
mongocxx::pipeline::replace_root
pipeline & replace_root(bsoncxx::document::view_or_value replace_root_args)
Promotes a specified document to the top level and replaces all other fields.
mongocxx::pipeline::current_op
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...
mongocxx::pipeline::view_array
bsoncxx::array::view view_array() const
mongocxx
Top level namespace for the MongoDB C++ driver.
Definition: bulk_write.hpp:24
mongocxx::pipeline::lookup
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...
bsoncxx
Top level namespace for MongoDB C++ BSON functionality.
Definition: element.hpp:24
bsoncxx::view_or_value< document::view, document::value >
mongocxx::pipeline::sort_by_count
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...
mongocxx::pipeline::index_stats
pipeline & index_stats()
Returns statistics regarding the use of each index for the collection.
mongocxx::pipeline::sample
pipeline & sample(std::int32_t size)
Randomly selects the specified number of documents that pass into the stage and passes the remaining ...
mongocxx::pipeline::sort
pipeline & sort(bsoncxx::document::view_or_value ordering)
Sorts all input documents and returns them to the pipeline in sorted order.
bsoncxx::array::view
A read-only, non-owning view of a BSON document.
Definition: view.hpp:33
mongocxx::client
Class representing a client connection to MongoDB.
Definition: client.hpp:58
mongocxx::pipeline::unwind
pipeline & unwind(bsoncxx::document::view_or_value unwind_args)
Deconstructs an array field from the input documents to output a document for each element.
mongocxx::pipeline::limit
pipeline & limit(std::int32_t limit)
Limits the number of documents passed to the next stage in the pipeline.
mongocxx::pipeline::skip
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...
mongocxx::pipeline::list_local_sessions
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.
mongocxx::pipeline::graph_lookup
pipeline & graph_lookup(bsoncxx::document::view_or_value graph_lookup_args)
Performs a recursive search on a collection.
mongocxx::pipeline::unwind
pipeline & unwind(std::string field_name)
Deconstructs an array field from the input documents to output a document for each element.
mongocxx::pipeline::count
pipeline & count(std::string field)
Returns a document containing a count of the number of documents input to the stage.
mongocxx::pipeline::match
pipeline & match(bsoncxx::document::view_or_value filter)
Filters the documents.
mongocxx::pipeline::pipeline
pipeline()
Creates a new aggregation pipeline.
mongocxx::pipeline::append_stage
pipeline & append_stage(bsoncxx::document::view_or_value stage)
Appends a stage to this pipeline object.
mongocxx::pipeline::project
pipeline & project(bsoncxx::document::view_or_value projection)
Projects a subset of the fields in the documents to the next stage of the pipeline.
mongocxx::pipeline::sort_by_count
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...
mongocxx::pipeline
Class representing a MongoDB aggregation pipeline.
Definition: pipeline.hpp:38
mongocxx::pipeline::facet
pipeline & facet(bsoncxx::document::view_or_value facet_args)
Processes multiple aggregation pipelines within a single stage on the same set of input documents.
mongocxx::database
Class representing a MongoDB database.
Definition: database.hpp:43
mongocxx::pipeline::append_stages
pipeline & append_stages(bsoncxx::array::view_or_value stages)
Appends stages to this pipeline object from the given bson array.
mongocxx::pipeline::pipeline
pipeline(pipeline &&) noexcept
Move constructs a pipeline.
mongocxx::collection
Class representing server side document groupings within a MongoDB database.
Definition: collection.hpp:81
mongocxx::pipeline::merge
pipeline & merge(bsoncxx::document::view_or_value merge_args)
Outputs the aggregation results to a collection.
mongocxx::pipeline::out
pipeline & out(std::string collection_name)
Takes documents returned by the aggregation pipeline and writes them to a specified collection.
mongocxx::pipeline::redact
pipeline & redact(bsoncxx::document::view_or_value restrictions)
Restricts the contents of the documents based on information stored in the documents themselves.
mongocxx::pipeline::group
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...
mongocxx::pipeline::geo_near
pipeline & geo_near(bsoncxx::document::view_or_value geo_near_args)
Outputs documents in order of nearest to farthest from a specified point.