Do you want to learn MySQL stored procedure?
This post has every detail that a mysql expert would
tell you about the stored procedure in MySQL.
So, let’s start right away!
MySQL stored procedure in a glance
An SQL query batch is known as a stored procedure if it can be
included in the storage of the server.
Initial approval and execution of the stored procedure allow a
batch to get optimized and securely saved on a server. After that, you can
simply use the designated name of the stored procedure to get the whole batch
of queries for execution quickly in a secured manner.
Importance of utilizing stored
procedure
ü Increased pace of
execution:
The inclusion of a stored procedure allows the server to
optimize and safely secure that particular batch of queries. This stored query
set becomes available for future execution right away without making any
effort. Hence, it saves time and increases the pace of form execution.
ü Reduced redundancy
of work:
Instead of doing the same thing again and again, you can use the
stored procedure to smartly utilize your work. The compilation of queries
becomes a one-time task. Then, it gets stored for every situation when you need
to execute the same batch of queries.
ü Decreased
communication costs:
Communicating the statement lines becomes easier across a
network. The server and a client receive lesser traffic due to the batch of
queries. A single line statement communicates the whole stored procedure.
Otherwise, the network has to process every query individually.
ü Improved
security:
When it comes to preventing SQL injection, this process serves
exceptionally. The optimization of queries in batches and storage safety delivers
excellent security.
ü Authenticated
access:
The security factor also improves due to the limited direct
access provided to a user to tables. A user’s role is defined, which grants
limited access to a particular procedure. This way, a user can access a procedure,
even if that particular user has no direct accessibility in the created tables
in a database.
Using MySQL stored procedure
With MySQL 5.0 or going beyond it, you can get the support of
the stored procedure. These are the steps required to utilize stored procedure:
§ The statement “Create Procedure” is used
to design one stored procedure. You need to specify the database name as well
as the name of the stored procedure when creating.
§ Generally, a stored procedure gets
surrounded by a command called DELIMITER. The purpose of this step is to ensure
that MySQL uses a separate delimiter whenever creating a stored procedure. For
that, the last semicolon in the command gets replaced with 2 forward slashes.
§ Run the created statement, and then,
crate the proc_name of the stored procedure. Then, you can use the CALL
statement to bring the stored procedure for execution.
§
The
statement DROP PROCEDURE proc_name; allows you to eliminate a procedure that is
not being used.
The use of stored procedure along with
parameters
When using stored procedures in MySQL, it is possible to use
three parameters.
1. IN
This mode of parameter requires your application to surpass the
value of this parameter whenever you call a particular stored procedure. The
parameters stay protected, which allows the stored procedure to retain its
original value after every execution. The changes in the value of a stored
procedure occur only in regards to its parameter. This works as the default
parameter mode. So, if you don’t add any parameter, the server uses IN
parameter mode.
2. OUT
The OUT parameter allows the change of its value within a stored
procedure. Then, the value reaches the calling application.
3. INOUT
As the name suggests, this parameter mode combines the features
of the IN as well as OUT modes. It is possible to surpass the initial value and
the utilized stored procedure holds the ability to change it. Also, the value
reaches a particular calling application.
Now, you have a better understanding of how the stored procedure
works in your favor. However, it would be wise to get in touch with a mysql database consultant to get a strategy prepared regarding your specific
needs related to the use of MySQL stored procedure. Choose an experienced
consultant to ensure the best utilization.
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