/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

12 votes219 views4 answers
How to check mysql version ubuntu
SQL
1 vote206 views2 answers
Sql server backup table
SQL
0 vote226 views1 answer
Oracle pl/sql check if file exists
SQL
0 vote183 views1 answer
Mysql local password denied
SQL
0 vote162 views1 answer
Django how to get query result count
SQL
0 vote241 views1 answer
How to add auto increment primary key
SQL
0 vote203 views1 answer
The report definition has an invalid target namespace 'http://schemas.microsoft.com/SQLServer/reporting/reportdesigner'
SQL
3 votes196 views1 answer
How to check schema privileges in oracle
SQL
0 vote198 views1 answer
Get who is hired in january in sql
SQL
0 vote193 views1 answer
Psql datestyle
SQL