Changes in MySQL Connector/NET 8.0.17 (Not yet released, General
Availability)


     * Functionality Added or Changed

     * Bugs Fixed

Functionality Added or Changed


     * Connector/NET supports SSL PEM certificate versions 1, 2,
       and 3 to enable use with the full range of applications
       that generate certificates. (Bug #29756058)

     * Support was added for .NET Core 2.2, which is a
       cross-platform version of .NET for building applications
       that run on Linux, macOS and Windows (see Connector/NET
       Versions
       (https://dev.mysql.com/doc/connector-net/en/connector-net
       -versions.html)).

     * Document Store: The Where() method is deprecated
       (Obsolete attribute applied) and will return a warning
       when called in the following method constructs:
       Find().Where(), Modify().Where(), and Remove().Where().

     * New README.md and CONTRIBUTING.md files now accompany
       MySQL Connector/NET code for compatibility with Git.
       Distribution packages (NuGet, MSI, ZIP) continue to
       include the original README file, but do not include the
       new files.

     * Connector/NET now supports the new utf8mb4_0900_bin
       collation added for the utf8mb4 Unicode character set in
       MySQL 8.0.17. For more information about this collation,
       see Unicode Character Sets
       (https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-
       sets.html).

     * Document Store: Connector/NET now supports the OVERLAPS
       and NOT OVERLAPS operators for expressions on JSON arrays
       or objects:
expr OVERLAPS expr
expr NOT OVERLAPS expr

       Suppose that a collection has these contents:
[{
   "_id": "1",
   "list": [1, 4]
 }, {
   "_id": "2",
   "list": [4, 7]
}]

       This operation:
var res = collection.Find("[1, 2, 3] OVERLAPS $.list").Fields("_id").E
xecute();
res.FetchAll();

       Should return:
[{ "_id": "1" }]

       This operation:
var res = collection.Find("$.list OVERLAPS [4]").Fields("_id").Execute
();
res.FetchAll();

       Should return:
[{ "_id": "1" }, { "_id": "2" }]

       An error occurs if an application uses either operator
       and the server does not support it.

     * Document Store: For index specifications passed to the
       Collection.CreateIndex() method, Connector/NET now
       supports indexing array fields. For example, consider a
       collection with this array:
Session session = MySQLX.GetSession(connString);
Schema schema = session.GetSchema(schemaName);
Collection coll = schema.CreateCollection(collectionName);

var docs = new[]
{
  new {  _id = 1, name = "John Smith", emails = [ "john.smith@mycompan
y.com", "jsmith@php.net", "jsmith@mail.com" ] }
};

coll.Add(docs).Execute();

       A single index field description can contain a new member
       name array that takes a Boolean value. If set to true,
       the field is assumed to contain arrays of elements of the
       given type. In addition, the set of possible index field
       data types (used as values of member type in index field
       descriptions) is extended with type CHAR(N), where the
       length N is mandatory. For example, to create the
       emails_idx index with an array field:
coll.CreateIndex("emails_idx",
    "{\"fields\": [{\"field\": $.emails,
                   \"type\":\"CHAR(128)\",
                   \"array\": true }]}"
);

       To find an element of the array:
collection
   .Find(":mail IN $.emails")
   .Bind("mail", "jsmith@php.net")
   .Execute();


     * New support for SSH tunneling enables Connector/NET to
       create secure connections to a remote MySQL server using
       TCP/IP over SSH. With SSH server authorization, an
       application can establish a connection from behind a
       firewall when the MySQL Server port is blocked. The new
       connection-string options (and equivalent class
       properties) for SSH tunneling are supported by both the
       classic MySQL protocol and X Protocol connections.

Bugs Fixed


     * The BouncyCastle assembly was loaded into memory whenever
       a connection attempt was made using any SSL mode type,
       except None. Now the assembly loads only when the SSL
       mode type is VerifyCA or VerifyFull, or when PEM
       certificates are used. (Bug #29611216)

     * Document Store: The MySqlConnection.GetSchema() method
       sometimes returned columns in an unexpected order when
       used with the INFORMATION_SCHEMA.COLUMNS table. This fix
       ensures that returned columns now correspond to the
       ordinal position only. (Bug #29536344)

     * The InvariantCulture property was missing from some data
       types, which created issues during platform migration
       operations. Thanks to Effy Teva for the patch. (Bug
       #29262195, Bug #94045)

     * Connector/NET connections executed SHOW VARIABLES
       unnecessarily. (Bug #28928543, Bug #93202)

     * Connector/NET access to MySQL stopped working after the
       computer hosting the server was started and continued to
       operate uninterrupted for a defined period of time. (Bug
       #26930306, Bug #75604)