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MySQL Connector/Python 8.0.21 has been released
Posted by: Balasubramanian Kandasamy
Date: July 13, 2020 04:28AM

Dear MySQL users,

MySQL Connector/Python 8.0.21 is the latest GA release version of the
MySQL Connector Python 8.0 series. The X DevAPI enables application
developers to write code that combines the strengths of the relational
and document models using a modern, NoSQL-like syntax that does not
assume previous experience writing traditional SQL.

To learn more about how to write applications using the X DevAPI, see

For more information about how the X DevAPI is implemented in MySQL
Connector/Python, and its usage, see

Please note that the X DevAPI requires at least MySQL Server version 8.0
or higher with the X Plugin enabled. For general documentation about how
to get started using MySQL as a document store, see

To download MySQL Connector/Python 8.0.21, see the "General Availability
(GA) Releases" tab at


Changes in MySQL Connector/Python 8.0.21 (2020-07-13, General Availability)

Functionality Added or Changed

     * Implemented context managers to define the runtime
       context to establish when executing a with statement. It
       was added to the Connection and Cursor objects in the
       classic protocol, and to Session in the X DevAPI. Thanks
       to WEN-FENG SHIH for the patch. (Bug #19586444, Bug
       #71663, Bug #28779784, Bug #89113)

     * Added compression support to X Protocol connections.
       Supported compression algorithms are zlib/deflate and
       lz4. Specifically, the supported algorithms (in order of
       preference) are lz4_message and deflate_stream. The
       compression threshold is set at 1000 bytes.
       A new compress X DevAPI connection option accepts either
       required, disabled, or preferred (default).

          + preferred: If Connector/Python and the server cannot
            reach consensus on algorithm or styles, then no
            compression is used; and this is logged.

          + required: Like preferred, except the connection is
            terminated with an error if the connector and server
            are unable to reach agreement.

          + disabled: Compression is not used.

Bugs Fixed

     * The connect_timeout option applied to all blocking socket
       operations but now properly only applies to the timeout
       when establishing the connection. (Bug #30996790)

     * In X DevAPI implementation, an error was raised when
       using the fractional part in DATETIME types. The error:
       "ValueError: Datetime mapping scenario unhandled" (Bug

     * Because MySQL stores TEXT types as BLOB and JSON as
       LONGBLOB, the TEXT and JSON types are now converted to
       str and the rest of the BLOB types as bytes. Previously,
       as an example, a column of type TEXT that only contained
       digits was read as type=integer by Connector/Python. (Bug
       #29808262, Bug #95437)

     * Connector/Python assumed that MySQL libraries were under
       lib/ when compiling the C extension, but now uses the
       mysql_config flags which adds the correct include and
       libraries paths. Thanks to Daniƫl van Eeden for the
       patch. (Bug #29181907, Bug #93846)

On Behalf of Oracle/MySQL Engineering Team,
Balasubramanian Kandasamy

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MySQL Connector/Python 8.0.21 has been released
July 13, 2020 04:28AM

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