Overhaul of character set configuration, everything now lives in a properties file.
Driver now correctly uses CP932 if available on the server for Windows-31J, CP932 and MS932 java encoding names, otherwise it resorts to SJIS, which is only a close approximation. Currently only MySQL-5.0.3 and newer (and MySQL-4.1.12 or .13, depending on when the character set gets backported) can reliably support any variant of CP932.
            com.mysql.jdbc.PreparedStatement.ParseInfo
            does unnecessary call to toCharArray().
            (Bug#9064)
          
            Memory leak in ServerPreparedStatement if
            serverPrepare() fails. (Bug#10144)
          
Actually write manifest file to correct place so it ends up in the binary jar file.
            Added createDatabaseIfNotExist property
            (default is false), which will cause the
            driver to ask the server to create the database specified in
            the URL if it doesn't exist. You must have the appropriate
            privileges for database creation for this to work.
          
            Unsigned SMALLINT treated as signed for
            ResultSet.getInt(), fixed all cases for
            UNSIGNED integer values and server-side
            prepared statements, as well as
            ResultSet.getObject() for
            UNSIGNED TINYINT. (Bug#10156)
          
Double quotes not recognized when parsing client-side prepared statements. (Bug#10155)
            Made enableStreamingResults() visible on
            com.mysql.jdbc.jdbc2.optional.StatementWrapper.
          
            Made ServerPreparedStatement.asSql() work
            correctly so auto-explain functionality would work with
            server-side prepared statements.
          
Made JDBC2-compliant wrappers public in order to allow access to vendor extensions.
            Cleaned up logging of profiler events, moved code to dump a
            profiler event as a string to
            com.mysql.jdbc.log.LogUtils so that third
            parties can use it.
          
            DatabaseMetaData.supportsMultipleOpenResults()
            now returns true. The driver has
            supported this for some time, DBMD just missed that fact.
          
            Driver doesn't support {?=CALL(...)} for
            calling stored functions. This involved adding support for
            function retrieval to
            DatabaseMetaData.getProcedures() and
            getProcedureColumns() as well. (Bug#10310)
          
            SQLException thrown when retrieving
            YEAR(2) with
            ResultSet.getString(). The driver will
            now always treat YEAR types as
            java.sql.Dates and return the correct
            values for getString(). Alternatively,
            the yearIsDateType connection property
            can be set to false and the values will
            be treated as SHORTs. (Bug#10485)
          
            The datatype returned for TINYINT(1)
            columns when tinyInt1isBit=true (the
            default) can be switched between
            Types.BOOLEAN and
            Types.BIT using the new configuration
            property transformedBitIsBoolean, which
            defaults to false. If set to
            false (the default),
            DatabaseMetaData.getColumns() and
            ResultSetMetaData.getColumnType() will
            return Types.BOOLEAN for
            TINYINT(1) columns. If
            true, Types.BOOLEAN
            will be returned instead. Regardless of this configuration
            property, if tinyInt1isBit is enabled,
            columns with the type TINYINT(1) will be
            returned as java.lang.Boolean instances
            from ResultSet.getObject(...), and
            ResultSetMetaData.getColumnClassName()
            will return java.lang.Boolean.
          
            SQLException is thrown when using
            property characterSetResults with
            cp932 or eucjpms. (Bug#10496)
          
            Reorganized directory layout. Sources now are in
            src folder. Don't pollute parent
            directory when building, now output goes to
            ./build, distribution goes to
            ./dist.
          
            Added support/bug hunting feature that generates
            .sql test scripts to
            STDERR when
            autoGenerateTestcaseScript is set to
            true.
          
0-length streams not sent to server when using server-side prepared statements. (Bug#10850)
            Setting cachePrepStmts=true now causes
            the Connection to also cache the check
            the driver performs to determine if a prepared statement can
            be server-side or not, as well as caches server-side
            prepared statements for the lifetime of a connection. As
            before, the prepStmtCacheSize parameter
            controls the size of these caches.
          
            Try to handle OutOfMemoryErrors more
            gracefully. Although not much can be done, they will in most
            cases close the connection they happened on so that further
            operations don't run into a connection in some unknown
            state. When an OOM has happened, any further operations on
            the connection will fail with a “Connection
            closed” exception that will also list the OOM
            exception as the reason for the implicit connection close
            event.
          
            Don't send COM_RESET_STMT for each
            execution of a server-side prepared statement if it isn't
            required.
          
            Driver detects if you're running MySQL-5.0.7 or later, and
            does not scan for LIMIT ?[,?] in
            statements being prepared, as the server supports those
            types of queries now.
          
            VARBINARY data corrupted when using
            server-side prepared statements and
            ResultSet.getBytes(). (Bug#11115)
          
            Connection.setCatalog() is now aware of
            the useLocalSessionState configuration
            property, which when set to true will
            prevent the driver from sending USE ...
            to the server if the requested catalog is the same as the
            current catalog.
          
            Added the following configuration bundles, use one or many
            via the useConfigs configuration
            property:
          
                maxPerformance — maximum
                performance without being reckless
              
                solarisMaxPerformance — maximum
                performance for Solaris, avoids syscalls where it can
              
                3-0-Compat — Compatibility with
                Connector/J 3.0.x functionality
              
            Added maintainTimeStats configuration
            property (defaults to true), which tells
            the driver whether or not to keep track of the last query
            time and the last successful packet sent to the server's
            time. If set to false, removes two
            syscalls per query.
          
            autoReconnect ping causes exception on
            connection startup. (Bug#11259)
          
            Connector/J dumping query into
            SQLException twice. (Bug#11360)
          
            Fixed PreparedStatement.setClob() not
            accepting null as a parameter.
          
Production package doesn't include JBoss integration classes. (Bug#11411)
Removed nonsensical “costly type conversion” warnings when using usage advisor.
Ésta es una traducción del manual de referencia de MySQL, que puede encontrarse en dev.mysql.com. El manual de referencia original de MySQL está escrito en inglés, y esta traducción no necesariamente está tan actualizada como la versión original. Para cualquier sugerencia sobre la traducción y para señalar errores de cualquier tipo, no dude en dirigirse a mysql-es@vespito.com.

