mysqlがサポートするストレージエンジンの表示方法

    :zhanhailiang   :2013-03-07

サーバがサポートするストレージエンジンを特定するには、次の文を実行します.

mysql> SHOW ENGINES\G
*************************** 1. row ***************************
      Engine: FEDERATED
     Support: NO
     Comment: Federated MySQL storage engine
Transactions: NULL
          XA: NULL
  Savepoints: NULL
*************************** 2. row ***************************
      Engine: MRG_MYISAM
     Support: YES
     Comment: Collection of identical MyISAM tables
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 3. row ***************************
      Engine: MyISAM
     Support: YES
     Comment: MyISAM storage engine
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 4. row ***************************
      Engine: BLACKHOLE
     Support: YES
     Comment: /dev/null storage engine (anything you write to it disappears)
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 5. row ***************************
      Engine: MEMORY
     Support: YES
     Comment: Hash based, stored in memory, useful for temporary tables
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 6. row ***************************
      Engine: CSV
     Support: YES
     Comment: CSV storage engine
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 7. row ***************************
      Engine: ARCHIVE
     Support: YES
     Comment: Archive storage engine
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 8. row ***************************
      Engine: PERFORMANCE_SCHEMA
     Support: YES
     Comment: Performance Schema
Transactions: NO
          XA: NO
  Savepoints: NO
*************************** 9. row ***************************
      Engine: InnoDB
     Support: DEFAULT
     Comment: Supports transactions, row-level locking, and foreign keys
Transactions: YES
          XA: YES
  Savepoints: YES
9 rows in set (0.00 sec)

SHOW ENGINESの代わりに次の文を使用して、興味のあるストレージエンジンの変数値を確認することもできます.

mysql> SHOW VARIABLES LIKE "have%";
+----------------------+----------+
| Variable_name        | Value    |
+----------------------+----------+
| have_compress        | YES      |
| have_crypt           | YES      |
| have_csv             | YES      |
| have_dynamic_loading | YES      |
| have_geometry        | YES      |
| have_innodb          | YES      |
| have_ndbcluster      | NO       |
| have_openssl         | DISABLED |
| have_partitioning    | YES      |
| have_profiling       | YES      |
| have_query_cache     | YES      |
| have_rtree_keys      | YES      |
| have_ssl             | DISABLED |
| have_symlink         | YES      |
+----------------------+----------+
14 rows in set (0.00 sec)

内訳:各値の意味
YES:この機能がサポートされ、アクティブになっています.

NO:この特性はサポートされていません.

DISABLED:この機能はサポートされていますが無効です.