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MySQL Connector/J 8.0.13 has been released
Posted by: Nawaz Nazeer ahamed
Date: October 22, 2018 08:50AM


Dear MySQL users,

Version 8.0.13 is the latest General Availability release of the 8.0
series of MySQL Connector/J. It is suitable for use with MySQL Server
versions 8.0, 5.7, 5.6, and 5.5. It supports the Java Database
Connectivity (JDBC) 4.2 API, and implements the X DevAPI.

This release includes the following new features and changes, also
described in more detail on

https://dev.mysql.com/doc/relnotes/connector-j/8.0/en/news-8-0-13.html

As always, we recommend that you check the "CHANGES" file in the
download archive to be aware of changes in behavior that might affect
your application.

To download MySQL Connector/J 8.0.13 GA, see the "Generally Available
(GA) Releases" tab at http://dev.mysql.com/downloads/connector/j/

Enjoy!

Changes in MySQL Connector/J 8.0.13 (2018-10-22, General
Availability)


Functionality Added or Changed


     * Important Change: Connector/J now requires Protocol
       Buffers 3.6.1 as an external library for using X DevAPI and for
       building Connector/J from source.  See Connector/J Installation
(http://dev.mysql.com/doc/connector-j/8.0/en/connector-j-installing.html)
       on installation requirements for Connector/J.
       (Bug #28499094)

     * X DevAPI: X DevAPI now provides a connection pooling
       feature, which can reduce overhead for applications by allowing
       idle connections to be reused. Connection pools are managed by
       the new Client objects, from which sessions can be obtained. See
       Connecting to a Single MySQL Server Using Connection Pooling in
       the X DevAPI User Guide
       (http://dev.mysql.com/doc/x-devapi-userguide/en/) for details.

     * X DevAPI: A new connection property,
       xdevapi.connect-timeout, now defines the timeout (in
       milliseconds) for establishing an X-Protocol connection to the
       server. Default value is 10000 (10s), and a value of 0 disables
       timeout, which makes Connector/J wait for the underlying socket
       to time out instead. See Configuration Properties
(http://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html)
       for details.
      
       Note that if xdevapi.connect-timeout is not set
       explicitly and connectTimeout is, xdevapi.connect-timeout takes
       up the value of connectTimeout.

     * The connection property useOldUTF8Behavior is no longer
       supported. The connection property never had any meaning for
       the MySQL Server versions supported by Connector/J 8.0, but
       actually corrupted the data when it was used with them.
       (Bug #28444461)

     * Connector/J now translates the legacy value of
       convertToNull for the connection property zeroDateTimeBehavior to
       CONVERT_TO_NULL. This allows applications or frameworks that use
       the legacy value (for example, NetBeans) to work with Connector/J
       8.0. (Bug #28246270, Bug #91421)

     * A new connection property, sslMode, has been introduced
       to replace the connection properties useSSL, requireSSL, and
       verifyServerCertificate, which are now deprecated.  Also, when
       not explicitly set, the connection properties xdevapi.ssl-mode,
       xdevapi.ssl-truststore, xdevapi.ssl-truststore-password, and
       xdevapi.ssl-truststore-type now take up the values of sslMode,
       trustCertificateKeyStoreUrl, trustCertificateKeyStorePassword,
       and trustCertificateKeyStoreType, respectively. See Connecting
       Securely Using SSL
(http://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-using-ssl.html)
       and Configuration Properties
(http://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-configuration-properties.html)
       for details.
      
       Note that for ALL server versions, the default setting
       of sslMode is PREFERRED, and it is equivalent to the legacy
       settings of useSSL=true, requireSSL=false, and
       verifyServerCertificate=false, which are different from their
       default settings for Connector/J 8.0.12 and earlier in some
       situations. Applications that continue to use the deprecated
       properties and rely on their old default settings should be
       reviewed.  (Bug #27102307)

     * The value UTF-8 for the connection property
       characterEncoding now maps to the utf8mb4 character set on the
       server and, for MySQL Server 5.5.2 and later,
       characterEncoding=UTF-8 can now be used to set the connection
       character set to utf8mb4 even if character_set_server has been
       set to something else on the server. (Before this change, the
       server must have character_set_server=utf8mb4 for Connector/J to
       use that character set.) Also, if the connection property
       connectionCollation is also set and is incompatible with the
       value of characterEncoding, characterEncoding will be overridden
       with the encoding corresponding to connectionCollation.  See
       Using Character Sets and Unicode
(http://dev.mysql.com/doc/connector-j/8.0/en/connector-j-reference-charsets.html)
       for details, including how to use the utf8mb3 character set now
       for connection. (Bug #23227334, Bug #81196)


Bugs Fixed


     * X DevAPI: Connector/J threw a WrongArgumentException when
       it encountered a JSON number with more than ten digits.  This was
       due to an error in the JSON parser, which has now been fixed.
       (Bug #28594434, Bug #92264)

     * X DevAPI: Session.getUri() returned a
       NullPointerException when the default value is null for any of
       the connection properties contained in the connection URL; and
       when Session.getUri() returned a URL, the URL contained a comma
       (",") before its first connection property. (Bug #23045604)

     * X DevAPI: When handling an invalid JSON document,
       Connector/J threw a NullPointerException. With this fix, a
       WrongArgumentException is thrown instead in the situation.
       (Bug #21914769)

     * Setting the connection property characterEncoding to an
       encoding that maps to the MySQL character set latin1 or utf8mb4
       did not result in the corresponding default connection collation
       (latin1_swedish_ci or utf8mb4_0900_ai_ci, respectively) to be
       used on the server. With this fix, the server default is used in
       the situation. (Bug #28207422)

     * Calling UpdatableResultSet.updateClob() resulted in an
       SQLFeatureNotSupportedException. It was because the
       implementation of the method was missing from Connector/J, and it
       has been added with this fix. (Bug #28207088)

     * When a connection property's value contained an equal
       sign ("=") in itself, an exception ("WrongArgumentException:
       Malformed database URL") was thrown. This was due to an error in
       the parser for the connection URL, which has been corrected by
       this fix.  (Bug #28150662)

     * Connector/J threw a SQLSyntaxErrorException when the
       parameter tableName for
       DatabaseMetaDataUsingInfoSchema.getTables() had a null argument.
       (Bug #28034570, Bug #90887)

     * Setting rewriteBatchedStatements=true and
       useLocalTransactionState=true caused transactions to be
       uncommitted for batched UPDATE and DELETE statements. It was due
       to the intermediate queries for enabling multiquery support on
       the server resetting the local transaction state as a side
       effect. With this fix, the local transaction state is preserved
       when the intermediate queries are executed.
       (Bug #27658489, Bug #89948)

     * Rewriting prepared INSERT statements in a multiquery
       batch failed with a BatchUpdateException when the statements did
       not contain place holders. This was due a faulty mechanism for
       query rewriting, which has been corrected by this fix.
       (Bug #25501750, Bug #84813)      

     * When using batched prepared statements with multiple
       queries per statement, queries rewriting was incorrect, resulting
       in the wrong queries being sent to the server. 
       (Bug #23098159, Bug #81063)

     * Record updates failed for a scrollable and updatable
       PreparedStatement when the WHERE clause for the updater or
       refresher contained fractional timestamp values and the
       connection property sendFractionalSeconds was set to false. It
       was because in the situation, Connector/J did not perform the
       proper adjustments of the fractional parts in the WHERE clause
       values according to the length of the field's fractional part as
       defined in the database. This fix makes Connector/J perform the
       proper adjustment to the fractional part, so that the WHERE
       clause value can be properly compared to the value fetched from
       the database. (Bug #22305979)

     * Some tests in the testsuite failed as they could not
       recognize system time zone values like CEST or WEST, even with
       the connection property serverTimezone set. This was because the
       value of serverTimezone in the testsuite URLs, after being
       processed by the testsuite, was not actually propagated as a
       connection property to Connector/J. This fix makes sure the
       property is in the actual URLs passed to Connector/J.
       (Bug #21774249)

     * When a Java Date value was bound to a PreparedStatement
       parameter, attempts to format the value by a proleptic
       GregorianCalendar failed to make the dates proleptic, so that
       dates before the Julian-Gregorian cutover (October 15, 1582) were
       stored wrongly. With this fix, a proleptic calendar is properly
       used if supplied to the setDate() method.  Note that when trying
       to set or retrieve dates before the Julian-Gregorian cutover with
       PreparedSatement methods, a proleptic GregorianCalendar should
       always be explicitly supplied to the setDate() and getDate()
       method. For details, see Known Issues and Limitations
(http://dev.mysql.com/doc/connector-j/8.0/en/connector-j-usagenotes-known-issues-limitations.html).
       (Bug #18749544, Bug #72609)


Enjoy and thanks for the support!

On behalf of the MySQL Release Team,
Nawaz Nazeer Ahamed



Edited 1 time(s). Last edit at 10/22/2018 08:57AM by Nawaz Nazeer ahamed.

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