Added the --server-id option to mysqlbinlog to enable only those events created by the server having the given server ID to be extracted. (Bug #15485)

Added the cp1250_polish_ci collation for the cp1250 character set.

The bundled BDB library was upgraded to version 4.4.16.

Added the mysqlslap program, which is designed to emulate client load for a MySQL server and report the timing of each stage. It works as if multiple clients are accessing the server.

Added the --bdb-data-direct and --bdb-log-direct server options.

It is now possible to build the server such that MyISAM tables can support up to 128 keys rather than the standard 64. This can be done by configuring the build using the option --with-max-indexes=N , where N≤128 is the maximum number of indexes to permit per table. (Bug #10932)

Added the myisam_use_mmap system variable.

MySQL Cluster: The --ndb option for perror did not function. (Bug #15486)

MySQL Cluster: Using ORDER BY primary_key_column when selecting from a table having the primary key on a VARCHAR column caused a forced shutdown of the cluster. (Bug #15240, Bug #15682, Bug #14828, Bug #15517)

Multiple-table update operations were counting updates and not updated rows. As a result, if a row had several updates it was counted several times for the “rows matched” value but updated only once. (Bug #15028)

ANALYZE TABLE did not properly update table statistics for a MyISAM table with a FULLTEXT index containing stopwords, so a subsequent ANALYZE TABLE would not recognize the table as having already been analyzed. (Bug #14902)

mysql ignored the MYSQL_TCP_PORT environment variable. (Bug #5792)

Server could not be built on default Debian systems with BDB enabled. (Bug #15734)

SHOW CREATE DATABASE was sometimes refused when the client had privileges for the database. (Bug #9785)

For binary string data types, mysqldump --hex-blob produced an illegal output value of 0x rather than ''. (Bug #13318)

Attempts to assign NULL to a NOT NULL column in strict mode now result in a message of Column 'col_name' cannot be null, rather than Column set to default value; NULL supplied to NOT NULL column 'col_name' at row n. (Bug #11491)

A left join on a column that having a NULL value could cause the server to crash. (Bug #15268)

SELECT queries that began with an opening parenthesis were not being placed in the query cache. (Bug #14652)

Creating a view within a stored procedure could result in an out of memory error or a server crash. (Bug #14885)

Some comparisons for the IN() operator were inconsistent with equivalent comparisons for the = operator. (Bug #12612)

BDB: A DELETE, INSERT, or UPDATE of a BDB table could cause the server to crash where the query contained a subquery using an index read. (Bug #15536)

ROW_COUNT() returned an incorrect result after EXECUTE of a prepared statement. (Bug #14956)

The BLACKHOLE storage engine did not handle transactions properly: Rolled-back transactions were written to the binary log. Now they ae not. (Bug #15406)

Space truncation was being ignored when inserting into BINARY or VARBINARY columns. Now space truncation results in a warning, or an error in strict mode. (Bug #14299)

SHOW ENGINES output showed the FEDERATED engine as DISABLED even for builds with FEDERATED support. (Bug #15559)

Creating a view that referenced a stored function that selected from a view caused a crash upon selection from the view. (Bug #15096)

Selecting from a view processed with the temptable algorithm caused a server crash if the query cache was enabled. (Bug #15119)

Invalid casts to DATE values now result in a message of Incorrect datetime value, rather than Truncated incorrect datetime value. (Bug #8294)

The maximum value of MAX_ROWS was handled incorrectly on 64-bit systems. (Bug #14155)

It was not possible to reorganize a partition reusing a discarded partition name.

Now, for example, you can create a table such as this one:

CREATE TABLE t1 (a INT)
    PARTITION BY RANGE (a) (
      PARTITION p0 VALUES LESS THAN (10),
      PARTITION p1 VALUES LESS THAN (20),
      PARTITION p2 VALUES LESS THAN MAXVALUE
    );

and then repartition it as shown here:

ALTER TABLE t1 REORGANIZE PARTITION p2 INTO (
    PARTITION p2 VALUES LESS THAN (30)
);

Previously, attempting to do so would produce the error All partitions must have unique names in the table . (Bug #15521)