About Reference：アバウトリファレンス

Issue error message if client C functions are called in wrong order.

Added automatic reconnect to the libmysql.c library. If a write command fails, an automatic reconnect is done.

Small sort sets no longer use temporary files.

Upgraded DBI to 0.91.

Fixed a couple of problems with LEFT OUTER JOIN.

Added CROSS JOIN syntax. CROSS is now a reserved word.

Recoded yacc/bison stack allocation to be even safer and to allow MySQL to handle even bigger expressions.

Fixed a couple of problems with the update log.

ORDER BY was slow when used with key ranges.