MONGOC_DATABASE_FIND_COLLECTIONS_WITH_OPTS - Online Linux Manual PageSection : 3
Updated : Feb 04, 2021
Source : 1.17.4
Note : libmongoc

NAMEmongoc_database_find_collections_with_opts − mongoc_database_find_collections_with_opts()

SYNOPSIS mongoc_cursor_t * mongoc_database_find_collections_with_opts (mongoc_database_t *database, const bson_t *opts); Fetches a cursor containing documents, each corresponding to a collection on this database. To get collection names only, use mongoc_database_get_collection_names_with_opts​. This function is considered a retryable read operation. Upon a transient error (a network error, errors due to replica set failover, etc.) the operation is safely retried once. If retryreads is false in the URI (see mongoc_uri_t) the retry behavior does not apply.

PARAMETERS • database: A mongoc_database_t​. • opts: A ­bson_t containing additional options. opts may be NULL or a BSON document with additional command options: • sessionId: First, construct a mongoc_client_session_t with mongoc_client_start_session​. You can begin a transaction with mongoc_client_session_start_transaction, optionally with a mongoc_transaction_opt_t that overrides the options inherited from database, and use mongoc_client_session_append to add the session to opts​. See the example code for mongoc_client_session_t​. • serverId: To target a specific server, include an int32 "serverId" field. Obtain the id by calling mongoc_client_select_server, then mongoc_server_description_id on its return value. For a list of all options, see ­the MongoDB Manual entry on the listCollections command​.

ERRORSUse mongoc_cursor_error on the returned cursor to check for errors.

RETURNSA cursor where each result corresponds to the server's representation of a collection in this database. The cursor functions mongoc_cursor_set_limit, mongoc_cursor_set_batch_size, and mongoc_cursor_set_max_await_time_ms have no use on the returned cursor.

EXAMPLES { bson_t opts = BSON_INITIALIZER; bson_t name_filter; const bson_t *doc; bson_iter_t iter; bson_error_t error; BSON_APPEND_DOCUMENT_BEGIN (&opts, "filter", &name_filter); /* find collections with names like "abbbbc" */ BSON_APPEND_REGEX (&name_filter, "name", "ab+c", NULL); bson_append_document_end (&opts, &name_filter); cursor = mongoc_database_find_collections_with_opts (database, &opts); while (mongoc_cursor_next (cursor, &doc)) { bson_iter_init_find (&iter, doc, "name"); printf ("found collection: %s\n", bson_iter_utf8 (&iter, NULL)); } if (mongoc_cursor_error (cursor, &error)) fprintf (stderr, "%s\n", error.msg); } mongoc_cursor_destroy (cursor); bson_destroy (&opts); }

SEE ALSOmongoc_database_get_collection_names_with_opts()

AUTHORMongoDB, Inc

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