Create a custom serial number

1. Due to the different mysql and oracle can not directly create a serial number so we there is a table for obtaining

DROP TABLE

    IF EXISTS sequence;

CREATE TABLE

    sequence

    (

        name VARCHAR(50) NOT NULL,

        current_value BIGINT NOT NULL,

        increment INT NOT NULL DEFAULT 1,

        PRIMARY KEY (name)

    )

    ENGINE=InnoDB;

Insert name and number sequences

INSERT INTO sequence VALUES ('SEQ_TRZ_MEMBER_NO',10000000000,1);

In the table shown in FIG.

2. Create currval function

This function gets the current value

DROP FUNCTION IF EXISTS currval;  

DELIMITER $$

CREATE FUNCTION currval (seq_name VARCHAR(50))  

RETURNS BIGINT(20)  

BEGIN  

  DECLARE value BIGINT ;  

  SET value = 0;  

  SELECT current_value into value

  FROM sequence  

  WHERE name = seq_name;  

  RETURN value;  

END $$

DELIMITER ;

 

carried out

select currval('SEQ_TRZ_MEMBER_NO')

 

3. Create a function nextval

In fact, based on current worth adding steps to do the update

DROP FUNCTION IF EXISTS nextval;  

DELIMITER $$  

CREATE FUNCTION nextval (seq_name VARCHAR(50))  

RETURNS BIGINT  

CONTAINS SQL  

BEGIN  

   UPDATE sequence  

   SET          current_value = current_value + increment  

   WHERE name = seq_name;  

   RETURN currval(seq_name);  

END $$  

DELIMITER ;

 

 

carried out

select nextval('SEQ_TRZ_MEMBER_NO')

 

 

note:

If there is an error, you can set about

set global log_bin_trust_function_creators=TRUE;