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Is `definer` required when creating a MySQL stored procedure?
No, definer part is not compulsory when you are creating a stored procedure. It is used when you want to create a definer.
Check all the user and host from the MySQL.user table −
mysql> select user,host from mysql.user;
The following is the output −
+------------------+-----------+ | user | host | +------------------+-----------+ | Manish | % | | User2 | % | | mysql.infoschema | % | | mysql.session | % | | mysql.sys | % | | root | % | | Adam Smith | localhost | | User1 | localhost | | am | localhost | +------------------+-----------+ 9 rows in set (0.03 sec)
Here, let us create a definer as Adam Smith. The query to create a stored procedure is as follows −
mysql> delimiter // mysql> CREATE DEFINER = 'Adam Smith'@'localhost' procedure Sp_Definer() -> begin -> select 'Hello MySQL'; -> end; -> // Query OK, 0 rows affected (0.14 sec) mysql> delimiter ;
Call the stored procedure using CALL command. The syntax is as follows −
CALL yourStoredProcedureName();
Call the above stored procedure.
mysql> call Sp_Definer();
The following is the output.
+-------------+ | Hello MySQL | +-------------+ | Hello MySQL | +-------------+ 1 row in set (0.00 sec) Query OK, 0 rows affected (0.01 sec)
Updated on: 30-Jun-2020
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