MySQL Connector/C++ 8.0.12 has been released

Dear MySQL users,

MySQL Connector/C++ 8.0.12 is the second GA release version of the MySQL Connector/C++ 8.0 series.

Connector/C++ 8.0 can be used to access MySQL implementing Document Store or in a traditional way, using SQL queries. It allows writing both C++ and plain C applications using X DevAPI and X DevAPI for C. It also supports the legacy API of Connector/C++ 1.1 based on JDBC4.

To learn more about how to write applications using X DevAPI, see “X DevAPI User Guide”

See also “X DevAPI Reference” at

and “X DevAPI for C Reference” at

For generic information on using Connector/C++ 8.0, see

Note: For X DevAPI applications, Connector/C++ 8.0 requires MySQL Server 5.7.12 or higher with X Plugin enabled. For applications that use the legacy JDBC API, Connector/C++ 8.0 can use MySQL Server 5.5 or higher, and X Plugin is not required.

To download MySQL Connector/C++ 8.0.12, see the “Generally Available (GA)
Releases” tab at

Changes in MySQL Connector/C++ 8.0.12 (2018-07-27, General Availability)
  • Installation Notes
  • Packaging Notes
  • Security Notes
  • X DevAPI Notes
  • Bugs Fixed
Installation Notes * Because the Microsoft Visual C++ 2017 Redistributable installer deletes the Microsoft Visual C++ 2015 Redistributable registry keys that identify its installation, standalone MySQL MSIs may fail to detect the Microsoft Visual C++ 2015 Redistributable if both it and the Microsoft Visual C++ 2017 Redistributable are installed. The solution is to repair the Microsoft Visual C++ 2017 Redistributable via the Windows Control Panel to recreate the registry keys needed for the runtime detection. Unlike the standalone MSIs, MySQL Installer for Windows contains a workaround for the detection problem. Packaging Notes * An RPM package for installing ARM 64-bit (aarch64) binaries of Connector/C++ on Oracle Linux 7 is now available in the MySQL Yum Repository and for direct download. Known Limitation for this ARM release: You must enable the Oracle Linux 7 Software Collections Repository (ol7_software_collections) to install this package, and must also adjust the libstdc++7 path. See Yum's Platform Specific Notes ( installation-yum-repo.html#yum-install-platform-specifics) for additional details. * Installers for Connector/C++ are now available in these formats: MSI packages (Windows); RPM packages (Linux); DMG packages (macOS). Security Notes * yaSSL is no longer included in Connector/C++ source distributions. wolfSSL may be used as a functionally equivalent alternative that has a GPLv2-compatible license. In addition, wolfSSL (like OpenSSL) supports the TLSv1.2 protocol, which yaSSL does not. To build Connector/C++ using wolfSSL, use the -DWITH_SSL=path_name CMake option, where path_name indicates the location of the wolfSSL sources. For more information, see Source Installation System Prerequisites ( -cpp-installation-source-prerequisites.html), and Connector/C++ Source-Configuration Options ( -source-configuration-options.html). X DevAPI Notes * Connector/C++ now supports NOWAIT and SKIP LOCKED lock contention modes to be used with lockExclusive() and lockShared() clauses of CRUD find/select operations (see Locking Read Concurrency with NOWAIT and SKIP LOCKED ( -locking-reads.html#innodb-locking-reads-nowait-skip-locked), and a default lock contention mode. The following list names the permitted constants. For each item, the first and second constants apply to X DevAPI and X DevAPI for C, respectively. + LockContention::DEFAULT, LOCK_CONTENTION_DEFAULT: Block the query until existing row locks are released. + LockContention::NOWAIT, LOCK_CONTENTION_NOWAIT: Return an error if the lock cannot be obtained immediately. + LockContention::SKIP_LOCKED, LOCK_CONTENTION_SKIP_LOCKED: Execute the query immediately, excluding from the query items that are locked. For X DevAPI and X DevAPI for C applications, lock mode methods accept these lock contention constants as a parameter. For X DevAPI applications, lock mode methods can be called without this parameter, as before; this is equivalent to passing a lock mode of DEFAULT. * Connector/C++ now supports the SHA256_MEMORY authentication mechanism for connections using the X Protocol. For X DevAPI applications, SessionOption::AUTH supports the new value AuthMethod::SHA256_MEMORY. For X DevAPI for C applications, the session option MYSQLX_OPT_AUTH supports the new value MYSQLX_AUTH_SHA256_MEMORY. These new values request using the sha256_memory authentication mechanism when creating a session. * For compliance with the Core DevAPI, these Connector/C++ changes were made: + getAffectedItemsCount() was moved from Result to Result_common. + Collection.modify(condition).arrayDelete() was removed. + getAffectedRowsCount() was removed. Use getAffectedItemsCount() instead. + getWarningCount() was renamed to getWarningsCount(). Bugs Fixed * utf8mb4 character data was handled incorrectly. (Bug#28240202) * Session creation had a memory leak. (Bug #27917942) * When configuring to build Connector/C++ with the legacy connector, CMake did not account for the MYSQL_CONFIG_EXECUTABLE option. (Bug #27874173, Bug#90389) * Improper error handling for unknown hosts when creating a session could result in unexpected application exit. (Bug#27868302) * The mysqlx_row_fetch_one() X DevAPI for C function could fail to return for large result set exceeding the maximum packet size. Now such result sets produce an error. (Bug#27732224)

Enjoy and thanks for the support!

On Behalf of Oracle/MySQL Release Engineering Team,
Balasubramanian Kandasamy