MariaDB Connector/C 3.0.1 Release Notes

Download Release Notes Changelog About MariaDB Connector/C

Release date: 18 Jan 2017

This is a Beta release of MariaDB Connector/C, formerly known as the MariaDB Client Library for C. As with any other pre-production release, cautions should be taken when installing on production systems or systems with critical data.

Download

Binary packages for Windows (32 and 64-bit) and generic Linux packages as well as source code packages are available from the MariaDB download page

New features

• Indicator variables for prepared statements
• MDEV-9114 bulk operations (array binding) for prepared statements (insert, update, delete).
• support for extended client/server capabilities (requires MariaDB 10.2 or newer)
• The DBUG library was removed from Connector/C 3.0
• Connector/C 2.3.2 now supports client plugins from MariaDB Server and Connector/C 3.0, for example GSSAPI plugin for kerberos authentication. Older plugins from previous versions of Connector/C can't be used anymore and might crash.

Plugins

• New GSSAPI authentication plugin.

New API functions and enhancements

• mariadb_stmt_execute_direct() prepares and executes in one step (mainly used by MariaDB ODBC driver)
• mariadb_cancel()aborts a connection immediately by making all subsequent read/write operations fail
• mysql_reset_connection() resets the current connection and clears session state
• mariadb_get_infov returns generic or connection specific information
• mysql_stmt_warning_count() returns warnings per statement
• Functions for obtaining session state changes:
  • mysql_session_track_get_first()
  • mysql_session_track_get_next()
• Added tls_version support for schannel. tls_version has to be specified via mysql_options(mysql, MARIADB_OPT_TLS_VERSION, ...)

Notable bug fixes

• CONC-224: Allow to build Connector/C without TLS/SSL support
• CONC-223: Add client support for missing collations
• CONC-218: reset a previously used statement when calling mysql_stmt_attr_set with option STMT_ATTR_PREBIND_PARAMS
• CONC-217: mariadb_stmt_execute_direct: Clear error message from mysql_stmt_execute if prepare failed
• CONC-202: remove definition of _snprintf (failed with Visual Studio 15)
• CONC-200: support of my_ulonglong
• CONC-180: return system error message in case of SEC_E_INTERNAL_ERROR (Schannel)
• CONC-177: Fixed length calculation for zerofill conversion from float/double to string
• CONC-170: missing blank in mariadb_config --libs output
• CONC-169: Memory corruption in mariadb_dyncol_unpack
• CONC-168: string conversion of timestamps is broken
• CONC-161: Increase username length to 128
• CONC-160: field metadata doesn't show NUM_FLAG for NEWDECIMAL columns
• CONC-155: return trailing zero when fetching from binary columns into string
• CONC-154: set statement status to MYSQL_STMT_FETCH_DONE if result set is empty or mysql_stmt_reset was called

• Solaris build fixes
• Build fixes for gcc 4.8
• Fixed possible overrun in authentication
• fixed crash in shared memory connection
• Fixed memory overrun in my_strdup_root
• binary fetch fixes for prepared statements:
  • append trailing \0 for strings
  • don't remove last byte for binary objects
• removed call of gnutls_bye() since server is not able to detect dead socket
• Added new cipher mapping for GnuTLS
• removed global context for TLS/SSL sessions
• fixed wrong behavior when using SChannel: SEC_I_RENEGOTIATE is now handled as error
• Optimization for re-preparing statement: Don't send COM_STMT_RESET if we will send COM_STMT_CLOSE afterwards
• MDEV-10894: fixed conversion for big-endian platforms
• MDEV-11008: Connector/C integration does not respect INSTALL_LIBDIR or INSTALL_DOCDIR
• MDEV-10357: my_context_continue() does not store current fiber on Windows
• Added support for OpenSSL 1.1
• fixed build when using GnuTLS. Minimum required version of GnuTLS is 3.3.24
• fixed output for plugin directory in mariadb_config
• added sigpipe handler for OpenSSL