java配合mysql生成序列号

java配合mysql生成序列号

1.第一步创建数据库存储过程

a.进程名：currval

BEGIN
DECLARE val BIGINT;
  set val = 0;
  select current_val into val from t_bas_sequence
  where seq_name = v_seq_name;
RETURN val;
END

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b.进程名：nextval

BEGIN
  DECLARE val BIGINT;
  DECLARE increment int;
   set val = currval(v_seq_name),increment = 0;
  SELECT increment_val into increment from t_bas_sequence
   where seq_name = v_seq_name;
   UPDATE t_bas_sequence
   set current_val = current_val + increment_val*count
   where seq_name = v_seq_name;
 RETURN val+increment;
END

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2.第二步创建数据库序列表

CREATE TABLE `t_bas_sequence` (
  `seq_name` varchar(64) NOT NULL DEFAULT '',
  `current_val` bigint(20) DEFAULT '0',
  `increment_val` int(11) DEFAULT '1',
  PRIMARY KEY (`seq_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=COMPACT;

1.第一步创建数据库存储过程