uncleflo
Registered since September 28th, 2017
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MySQL Table Locking
Saved by uncleflo on May 9th, 2018.
In this tutorial, you will learn how to use MySQL locking for cooperating table access between sessions. MySQL allows a client session to acquire a table lock explicitly for preventing other sessions from accessing the table during a specific period. A client session can acquire or release table locks only for itself. It cannot acquire or release table locks for other sessions. Before going into detail, we will create a sample database named sampledb that includes a simple table named tbl to practice the table locking statements.
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Locking for Concurrency in MySQL
Saved by uncleflo on May 9th, 2018.
The first and most important point is that the primary use of locking is to solve concurrency problems. If scripts are being implemented that write to the database but aren't multistep operations susceptible to the problems described in the last section, locks aren't needed. Simple scripts that insert one row, delete one row, or update one row, and that don't use results of a previous SELECT or data entered by the user as input, don't require a lock.
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