bool

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025    MONGOC_CLIENT_ENCRYPTION_ENCRYPT_EXPRESSION(3)

       • client_encryption: A mongoc_client_encryption_t

       • expr: The expression to encrypt.

       • opts: A mongoc_client_encryption_encrypt_opts_t.

       • expr_out: A bson_t for the resulting encrypted expression. expr_out  is  always  initialized  (even  on
         failure). Caller must call bson_destroy() to free.

       • error: A bson_error_t set on failure.

       Returns true if successful. Returns false and sets error otherwise.

       SEEALSO:mongoc_client_encryption_encrypt_opts_tmongoc_client_enable_auto_encryption()mongoc_client_decryption_decrypt()

          bool
          mongoc_client_encryption_encrypt_expression (
             mongoc_client_encryption_t *client_encryption,
             const bson_t *expr,
             mongoc_client_encryption_encrypt_opts_t *opts,
             bson_t *expr_out,
             bson_error_t *error);

       Added in version 1.24.0.

       Encrypts a Match Expression or Aggregate Expression to query a range index.

       To    query    with    a    Range    encrypted   payload,   use   a   mongoc_client_t   configured   with
       mongoc_auto_encryption_opts_t. The  mongoc_auto_encryption_opts_t  may  be  configured  to  bypass  query
       analysis with mongoc_auto_encryption_opts_set_bypass_query_analysis().  The mongoc_auto_encryption_opts_t
       must       not       be       configured       to       bypass       automatic       encryption      with
       mongoc_auto_encryption_opts_set_bypass_auto_encryption().

       To query with a Range payload, expr must be one of the following forms:

       1. A Match Expression of the following form:

             // $gt may also be $gte. $lt may also be $lte.
             // Can include one of $gt/$gte/$lt/$lte. It is not required to include both.
             {"$and": [{"<field>": {"$gt": "<value1>"}}, {"<field>": {"$lt": "<value2>" }}]}

       2. An Aggregation Expression of this form:

             // $gt may also be $gte. $lt may also be $lte
             // Can include one of $gt/$gte/$lt/$lte. It is not required to include both.
             {"$and": [{"$gt": ["<fieldpath>", "<value1>"]}, {"$lt": ["<fieldpath>", "<value2>"]}]