语法格式

CACHE INDEX                      
  tbl_index_list [, tbl_index_list] ...
  IN key_cache_name                    

tbl_index_list:
  tbl_name [[INDEX|KEY] (index_name[, index_name] ...)]

说明

CACHE INDEX 可以将表中索引分配到一些特别主键缓存。注意这些操作只能在MyISAM 存储引擎的表上进行。

例子

下面语句可以将table t1,t2,t3 的索引分配到hot_cache缓存中:

mysql> CACHE INDEX t1, t2, t3 IN hot_cache;
+---------+--------------------+----------+----------+
| Table   | Op                 | Msg_type | Msg_text |
+---------+--------------------+----------+----------+
| test.t1 | assign_to_keycache | status   | OK       |
| test.t2 | assign_to_keycache | status   | OK       |
| test.t3 | assign_to_keycache | status   | OK       |
+---------+--------------------+----------+----------+

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