/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

4 votes255 views1 answer
Select nls_date_format
SQL
0 vote272 views2 answers
Tsql row number
SQL
1 vote276 views1 answer
How to ckeck that email is present in databse in mysqli
SQL
4 votes274 views4 answers
Oracle tablespace tables list
SQL
0 vote271 views1 answer
What is between keyword used for
SQL
10 votes263 views1 answer
Create table oracle
SQL
0 vote314 views2 answers
Sql query print strings and int
SQL
2 votes273 views1 answer
Guid to string sql
SQL
3 votes269 views2 answers
Brew restart mysql
SQL
0 vote265 views1 answer
Oracle DROP PROGRAM
SQL