Fix bug with closing tags missing slash for
            mysqldump XML output.
          
            Remove end space from ENUM values. (This
            fixed a problem with SHOW CREATE TABLE.)
          
            Fixed bug in CONCAT_WS() that cut the
            result.
          
            Changed name of server variables
            Com_show_master_stat to
            Com_show_master_status and
            Com_show_slave_stat to
            Com_show_slave_status.
          
            Changed handling of gethostbyname() to
            make the client library thread-safe even if
            gethostbyname_r doesn't exist.
          
            Fixed core-dump problem when giving a wrong password string
            to GRANT.
          
            Fixed bug in DROP DATABASE with symlinked
            directory.
          
            Fixed optimization problem with DATETIME
            and value outside DATETIME range.
          
            Removed Sleepycat's BDB doc files from
            the source tree, as they're not needed (MySQL covers
            BDB in its own documentation).
          
            Fixed MIT-pthreads to compile with glibc
            2.2 (needed for make dist).
          
            Fixed the FLOAT(X+1,X) is not converted
            to FLOAT(X+2,X). (This also affected
            DECIMAL, DOUBLE and
            REAL types)
          
            Fixed the result from IF() is case
            in-sensitive if the second and third arguments are case
            sensitive.
          
            Fixed core dump problem on OSF/1 in
            gethostbyname_r.
          
Fixed that underflowed decimal fields are not zero filled.
            If we get an overflow when inserting
            '+11111' for DECIMAL(5,0)
            UNSIGNED columns, we will just drop the sign.
          
            Fixed optimization bug with
            ISNULL(expression_which_cannot_be_null)
            and ISNULL(constant_expression).
          
            Fixed host lookup bug in the glibc
            library that we used with the 3.23.50 Linux-x86 binaries.
          
This is a translation of the MySQL Reference Manual that can be found at dev.mysql.com. The original Reference Manual is in English, and this translation is not necessarily as up to date as the English version.

