how to use WHERE IN mysql stored procedure

问题

How do I pass an array and use WHERE IN inside stored procedure?

Do i need to concatenate input string or something ?

Lets say

DELIMITER $$
DROP PROCEDURE IF EXISTS `abc`.`table1`$$
CREATE PROCEDURE  `abc`.`test`
(IN somestring VARCHAR(255))
BEGIN
    SELECT * FROM abc.table1 
    WHERE flight_type IN somestring
END $$
DELIMITER ;

回答1:

You can use the string concatenation and the PREPARE statement to run dynamically built queries.

somestring must be constructed in a valid SQL format like '1','2','3'

DELIMITER $$
DROP PROCEDURE IF EXISTS `abc`.`table1`$$
CREATE PROCEDURE  `abc`.`test`
(IN somestring VARCHAR(255))
BEGIN
    @s=CONCAT("
    SELECT * FROM abc.table1 
    WHERE flight_type IN (",somestring,");")
    PREPARE stmt FROM @s;
    EXECUTE @s;
END $$
DELIMITER ;

回答2:

You can use FIND_IN_SET() if somestring is formatted a,b,c,d:

SELECT *
FROM abc.table1
WHERE FIND_IN_SET(flight_type, somestring)

回答3:

This should work as long as somestring is of the form

"(item1, item2, item3, ... )"

if not, you could format it accordingly inside of your SP but I'm not sure what the best practice is.

回答4:

The accepted answer needed modification to work with my version of MariaDB.

The CONCAT statement was missing a semicolon, The EXECUTE statement was called on @s (a variable) rather than stmt (a statement), and the drop/create portion was confusing. Here's my rewrite:

DELIMITER $$
DROP PROCEDURE IF EXISTS `dbname`.`procedurename`$$
CREATE PROCEDURE  `dbname`.`procedurename`
(IN somestring VARCHAR(255))
BEGIN
    SET @s=CONCAT("
    SELECT * FROM dbname.table1 
    WHERE flight_type IN (",somestring,");");
    PREPARE stmt FROM @s;
    EXECUTE stmt;
END $$
DELIMITER ;

来源：https://stackoverflow.com/questions/5373495/how-to-use-where-in-mysql-stored-procedure

标签

mysql

stored-procedures