MariaDB Connector/C 3.0.1 Release Notes

The most recent Stable (GA) release of MariaDB Connector/C is:MariaDB Connector/C 3.4.5

DownloadRelease NotesChangelogAbout 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.

For a description of this library see theMariaDB Connector/C page.

Download

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

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