如果您决心通过第一个字母来做,我认为RANGE 分区可以解决问题。但是,如果您对按首字母进行分区没有绝对要求,则LINEAR KEY 分区可能会更好。
这是我从手册页中提取并修改为使用 varchar 列的示例:
CREATE TABLE employees (
id INT NOT NULL,
fname VARCHAR(30),
lname VARCHAR(30),
hired DATE NOT NULL DEFAULT '1970-01-01',
separated DATE NOT NULL DEFAULT '9999-12-31',
job_code INT NOT NULL,
store_id INT NOT NULL
)
PARTITION BY RANGE COLUMNS(fname) (
PARTITION p0 VALUES LESS THAN ('h'),
PARTITION p1 VALUES LESS THAN ('m'),
PARTITION p2 VALUES LESS THAN ('t'),
PARTITION p3 VALUES LESS THAN MAXVALUE
);
并运行它:
... Physical database connection acquired for: Feynman
12:33:07 [CREATE - 0 row(s), 0.062 secs] Command processed. No rows were affected
... 1 statement(s) executed, 0 row(s) affected, exec/fetch time: 0.062/0.000 sec [0 successful, 1 warnings, 0 errors]