[+/-]
Version 4.0 of the MySQL server includes many enhancements and new features:
          The InnoDB storage engine is now included
          in the standard binaries, adding transactions, row-level
          locking, and foreign keys. See 項7.5. 「InnoDB テーブル」.
        
A query cache, offering vastly increased performance for many applications. By caching complete result sets, later identical queries can return instantly. See 項6.9. 「MySQL クエリキャッシュ」.
Improved full-text indexing with boolean mode, truncation, and phrase searching. See 項6.8. 「MySQL 全文検索」.
          Enhanced MERGE tables, now supporting
          INSERT statements and
          AUTO_INCREMENT. See
          項7.2. 「MERGE テーブル」.
        
          UNION syntax in SELECT.
          See 項6.4.1.2. 「UNION 構文」.
        
          Multiple-table DELETE statements. See
          項6.4.5. 「DELETE 構文」.
        
          libmysqld, the embedded server library. See
          項11.1.15. 「組み込み MySQL サーバライブラリ libmysqld」.
        
          Additional GRANT privilege options for even
          tighter control and security. See 項4.4.1. 「GRANT および REVOKE の構文」.
        
          Management of user resources in the GRANT
          system, particularly useful for ISPs and other hosting
          providers. See 項4.4.7. 「ユーザリソースの制限」.
        
          Dynamic server variables, allowing configuration changes to be
          made without having to stop and restart the server. See
          項5.5.6. 「SET 構文」.
        
Improved replication code and features. See 項4.11. 「MySQL のレプリケーション」.
Numerous new functions and options.
Changes to existing code for enhanced performance and reliability.
For a full list of changes, please refer to the changelog sections for each individual 4.0.x release.
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.

