MySQL 5.7 Release Notes
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This section provides user documentation for MySQL Shell, which enables you to prototype code using the X DevAPI to communicate with a MySQL Server running the X Plugin. The X Plugin is a new MySQL Server feature available with MySQL Server 5.7.12 and higher.
MySQL Shell is an advanced command-line client and code editor for the MySQL Server. In addition to SQL, MySQL Shell also offers scripting capabilities for JavaScript and Python. When MySQL Shell is connected to the MySQL Server through the X Protocol, the X DevAPI can be used to work with both relational and document data.