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MySQL Connector/J 3.1.2 ALPHA Has Been Released

MySQL Connector/J 3.1.2 ALPHA Has Been Released

2004-06-08       - By Mark Matthews

 Back
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Hi,

MySQL Connector/J 3.1.2, a new version of the Type-IV all-Java JDBC
driver for MySQL has been released.

Version 3.1.2 is a new feature release for the ALPHA tree that is
suitable for use with either MySQL-4.1 or MySQL-5.0 (and is required
when using server-side prepared statements on MySQL-4.1.2 or newer).

It is now available in source and binary form from the Connector/J
download pages at http://www.mysql.com/downloads/api-jdbc-stable.html
and mirror sites (note that not all mirror sites may be up to date at
this point of time - if you can 't find this version on some mirror,
please try again later or choose another download site.)

Please note that currently server-side prepared statements are
automatically disabled in this release when the driver is connecting to
MySQL-5.0.0 or MySQL-5.0.1, as the current prepared statement code from
the 4.1 branch (which contains network protocol-level changes) has yet
to be merged into the 5.0 source tree.

Depending on bug reports from the field, and how the release time line
for MySQL-4.1 plays out, this release should be the last ALPHA release
of the Connector/J 3.1 series.

The focus of the next release of Connector/J 3.1 is on code cleanup and
performance improvements (although micro-performance benchmarks are
looking pretty good right now, approx 25-30% faster than the 3.0 series
due mostly to shortening call stack length and some optimizations in
re-using expensive to allocate objects).

Have fun with this release!

Please take the time to file any bugs you might encounter (hopefully
none!) at http://bugs.mysql.com/ ... We 're particularly interested in any
issues you might have with this release and MySQL-4.1.2 with respect to
server-side prepared statements.

Regards,

   -Mark

- From the changelog:

06-09-04 - Version 3.1.2-alpha

- Fixed stored procedure parameter parsing info when size was
specified for a parameter (i.e. char(), varchar()).

- Enabled callable statement caching via 'cacheCallableStmts '
property.

- Fixed case when no output parameters specified for a
stored procedure caused a bogus query to be issued
to retrieve out parameters, leading to a syntax error
from the server.

- Fixed case when no parameters could cause a NullPointerException
in CallableStatement.setOutputParameters().

- Removed wrapping of exceptions in MysqlIO.changeUser().

- Fixed sending of split packets for large queries, enabled nio
ability to send large packets as well.

- Added .toString() functionality to ServerPreparedStatement,
which should help if you 're trying to debug a query that is
a prepared statement (it shows SQL as the server would process).

- Added 'gatherPerformanceMetrics ' property, along with properties
to control when/where this info gets logged (see docs for more
info).

- ServerPreparedStatements weren 't actually de-allocating
server-side resources when .close() was called.

- Added 'logSlowQueries ' property, along with property
'slowQueriesThresholdMillis ' to control when a query should
be considered 'slow '.

- Correctly map output parameters to position given in
prepareCall() vs. order implied during registerOutParameter() -
fixes BUG#3146.

- Correctly detect initial character set for servers >= 4.1.0

- Cleaned up detection of server properties.

- Support placeholder for parameter metadata for server >= 4.1.2

- Fix for BUG#3539 getProcedures() does not return any procedures in
result set

- Fix for BUG#3540 getProcedureColumns() doesn 't work with wildcards
for procedure name

- Fixed BUG#3520 -- DBMD.getSQLStateType() returns incorrect value.

- Added 'connectionCollation ' property to cause driver to issue
'set collation_connection=... ' query on connection init if default
collation for given charset is not appropriate.

- Fixed DatabaseMetaData.getProcedures() when run on MySQL-5.0.0
(output of
'show procedure status ' changed between 5.0.1 and 5.0.0.

- Fixed BUG#3804 -- getWarnings() returns SQLWarning instead of
DataTruncation

- Don 't enable server-side prepared statements for server version
5.0.0 or 5.0.1, as they aren 't compatible with the '4.1.2+ ' style that
the driver uses (the driver expects information to come back that isn 't
there, so it hangs).
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