How do I lock a stored procedure in SQL Server?
A better solution is available: SQL Server provides an application manageable lock mechanism through the sp_getapplock / sp_releaseapplock pair of system stored procedures. They provide a way for application code to use SQL’s underlying locking mechanism, without having to lock database rows.
How do I schedule a stored procedure in mysql?
Creating new MySQL events First, specify the name of the event that you want to create the CREATE EVENT keywords. The event names must be unique within the same database. Second, specify a schedule after the ON SCHEDULE keywords. Third, place SQL statements after the DO keyword.
What is MySQL Stored Procedure?
The stored procedure is SQL statements wrapped within the CREATE PROCEDURE statement. The stored procedure may contain a conditional statement like IF or CASE or the Loops. This way, a stored procedure makes the database more consistent. If any change is required, you need to make a change in the stored procedure only.
When does SQL Server execute a stored procedure?
The dbo schema in the current database. Procedures marked for automatic execution are executed every time SQL Server starts and the master database is recovered during that startup process.
What happens if two persons run a SQL procedure at the same time?
If two persons run a stored procedure at the same time, the database consistency may be violated. To protect against various kinds of database inconsistencies, the SQL standard has four transaction isolation levels: READ UNCOMMITTED where basically transactions lose their value, other transactions seeing dirty data.
Can a procedure be run by multiple people at the same time?
I want to avoid multiple people from doing that at the same time. While this procedure is running, I don’t want anyone else to be able to start it, however I don’t want serialization, the other person to run the procedure after I am done with it.
How to set a lock timeout in SQL Proc?
To add to @Tibor-Karaszi’s answer, setting a lock timeout doesn’t actually produce an error (I’ve submitted a PR against the docs). sp_getapplock just returns -1, so you have to check the return value. So like this: Use sp_getapplock in the beginning of the proc, and set a lock timeout to a very low value.