/SQL/Mysql loop through databases and execute query

Mysql loop through databases and execute query

delimiter //
DROP PROCEDURE IF EXISTS create_procedures//
CREATE PROCEDURE create_procedures()
BEGIN
    DECLARE done INT DEFAULT 0;
    DECLARE db VARCHAR(255);
    DECLARE appDBs CURSOR FOR SELECT schema_name FROM information_schema.schemata WHERE schema_name LIKE 'application_%';
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

    SET @procName = "simpleproc"; -- Change this to your proc name

    SET @output = "delimiter //";

    OPEN appDBs;
    REPEAT
        FETCH appDBs INTO db;
        IF NOT done THEN
            -- Replace this procedure declaration with your procedure.
            -- Make sure to keep the ',db,' syntax there.
            -- You should really only have to change the parameters
            -- and the stuff between the BEGIN and END clauses.
            SET @output = CONCAT(@output,'
    DROP PROCEDURE IF EXISTS ',db,'.',@procName,'//
    CREATE PROCEDURE ',db,'.',@procName,'()
        BEGIN
            SELECT 1;
        END//');

        END IF;
    UNTIL done END REPEAT;

    CLOSE appDBs;

    SET @output = CONCAT(@output,'\ndelimiter ;');

    SELECT @output AS procs;
END//
delimiter ;

Source: stackoverflow.com

Similar codes

2 votes129 views1 answer
Scaffold npgsql net core
SQL
0 vote141 views1 answer
Traccar mysql
SQL
0 vote167 views1 answer
Where to find pg_hba.conf in ubuntu
SQL
0 vote165 views1 answer
Mysql where sum > 0
SQL
1 vote137 views1 answer
Postgresql round double precision
SQL
2 votes142 views3 answers
Postgresql reset auto increment
SQL
0 vote118 views1 answer
Ms sql unique
SQL
7 votes132 views3 answers
Postgresql dump and restore db
SQL
5 votes135 views2 answers
Update all rows mysql
SQL
3 votes140 views1 answer
Make a field auto_increment mysql
SQL