bool

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                  MONGOC_COLLECTION_UPDATE_MANY(3)

       This function updates all documents in collection that match selector.

       To update at most one document see mongoc_collection_update_one().

       If you pass a non-NULL reply, it is filled out with fields  matchedCount, modifiedCount,  and  optionally
       upsertedId  if  applicable.  If  there is a server error then reply contains either a "writeErrors" array
       with one subdocument or a "writeConcernErrors" array. The reply must be freed with bson_destroy().

       Errors are propagated via the error parameter.

       • collection: A mongoc_collection_t.

       • selector: A bson_t containing the query to match documents for updating.

       • update: A bson_t containing the update to perform. If updating with a pipeline, a bson_t array.

       • reply: A maybe-NULL pointer to overwritablestorage for a bson_t to contain the results.

       • error: An optional location for a bson_error_t or NULL.

       opts may be NULL or a BSON document with additional command options:

       • writeConcern: Construct a mongoc_write_concern_t and use mongoc_write_concern_append() to add the write
         concern to opts. See the example code for mongoc_client_write_command_with_opts().

       • 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   collection,   and   use
         mongoc_client_session_append()   to   add   the   session   to   opts.   See   the   example  code  for
         mongoc_client_session_t.

       • validate: Construct a bitwise-or of all desired bson_validate_flags_t. Set to false to skip client-side
         validation of the provided BSON documents.

       • comment: A bson_value_t specifying the comment to attach to this command. The comment  will  appear  in
         log messages, profiler output, and currentOp output. Requires MongoDB 4.4 or later.

       • bypassDocumentValidation:  Set  to  true  to  skip  server-side  schema validation of the provided BSON
         documents.

       • collation: Configure textual comparisons. See SettingCollationOrder, and theMongoDBManualentryonCollation. Collation requires MongoDB 3.2 or later, otherwise an error is returned.

       • hint: A document or string that specifies the index to use to support the query predicate.

       • upsert: When true, creates a new document if no document matches the query.

       • let:  A  BSON  document  consisting  of  any number of parameter names, each followed by definitions of
         constants in the MQL Aggregate Expression language.

       • arrayFilters: An array of filters specifying to which array elements an update should apply.

       Returns true if successful. Returns false and sets error if there are invalid arguments or  a  server  or
       network error.

       A write concern timeout or write concern error is considered a failure.

       SEEALSO:MongoDBupdatecommanddocumentation for more information on the update options.

          mongoc_collection_update_one()

          bool
          mongoc_collection_update_many (mongoc_collection_t *collection,
                                         const bson_t *selector,
                                         const bson_t *update,
                                         const bson_t *opts,
                                         bson_t *reply,
                                         bson_error_t *error);