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MONGOC_CURSOR_NEW_FROM_COMMAND_REPLY(3) Library Functions Manual MONGOC_CURSOR_NEW_FROM_COMMAND_REPLY(3)

NAME

mongoc_cursor_new_from_command_reply() - Some MongoDB commands return a "cursor" document. For example, given an "aggregate" command:

SYNOPSIS



mongoc_cursor_t *
mongoc_cursor_new_from_command_reply (mongoc_client_t *client,
                                      bson_t          *reply,
                                      uint32_t         server_id);

PARAMETERS

client
A mongoc_client_t
reply
The reply to a command, such as "aggregate", "find", or "listCollections", that returns a cursor document. The reply is destroyed by mongoc_cursor_new_from_command_reply and must not be accessed afterward.
server_id
The opaque id of the server used to execute the command.

DESCRIPTION

Some MongoDB commands return a "cursor" document. For example, given an "aggregate" command:

{ aggregate : collection , pipeline : [], cursor : {}}

The server replies:

{
   "cursor" : {
   "id" : 1234,
   "ns" : "db.collection",
   "firstBatch" : [ ]
   },
   "ok" : 1
}

mongoc_cursor_new_from_command_reply is a low‐level function that initializes a mongoc_cursor_t from such a reply.

Use this function only for building a language driver that wraps the C Driver. When writing applications in C, higher‐level functions such as mongoc_collection_aggregate are more appropriate, and ensure compatibility with a range of MongoDB versions.

RETURNS

A mongoc_cursor_t mongoc_cursor_error

COLOPHON

This page is part of MongoDB C Driver. Please report any bugs at https://jira.mongodb.org/browse/CDRIVER.
2016‐10‐12 MongoDB C Driver