Skip to main content

Restrict SP_ (Naming convention) with DDL Trigger

Sometimes naming convention also impact the performance problem in SQL SERVER. Whenever we creating the stored procedures we are giving the name just like SP_Get_Customer. SP_ it first checks the Master Database system procedures. All the system procedures stored in Master Database.
In this article we do not allow SP_ whenever stored procedure creating by using DDL Trigger.

--Create Student Table
create table Student
(             
                id int identity(1,1) ,
                Name varchar(100)
)

--Create DDL Trigger on Database
create  trigger Restrict_Sp_NameConvenction
on database
for create_Procedure
as
begin
declare @EventData XML = EVENTDATA(),@ObjectName Nvarchar(100);
select    @ObjectName=@EventData.value('(/EVENT_INSTANCE/ObjectName[1]','NVARCHAR(100)');
                if(substring(@ObjectName,1,3)='sp_')
                begin
                                raiserror('Procedure name can not be start with sp_',16,1)
                                rollback;
                end
end

--Create Stored Procedure Name starts with sp_
create procedure sp_Get_Student
 as
 begin
                select * from Student
 end

Msg 50000, Level 16, State 1, Procedure Restrict_Sp_NameConvenction, Line 10
Procedure name can not be start with sp_
Msg 3609, Level 16, State 2, Procedure sp_Get_Student, Line 1
The transaction ended in the trigger. The batch has been aborted.

--Create Stored Procedure Name does not starts with sp_
create procedure usp_Get_Student
 as
 begin
                select * from Student
 end

--Command(s) completed successfully.
  
 drop procedure sp_Get_Student

-- Disable trigger from Databse
disable trigger Restrict_Sp_NameConvenction on database

--Enable trigger from Databse
Enable trigger Restrict_Sp_NameConvenction on database

--Drop trigger from Databse
drop trigger Restrict_Sp_NameConvenction on database

--For more information about trigger event types
 select * from sys.trigger_event_types

Comments

Popular posts from this blog

Coalesce function

Coalesce function returns the first non-null value among the arguments. Syntax: Coalesce (expression [,..n]) Here is example using Coalesce function Example 1 DECLARE @Str1 varchar ( 10 ), @str2 varchar ( 20 ), @Str3 varchar ( 20 ) SET @Str2 = 'Sql' , @Str3 = 'Server' SELECT COALESCE ( @Str1 , @str2 , @Str3 ) As [Coalesce] In above example @Str2 value is ‘Sql’ , @str3 value is ‘Server’  and @str1 values is Null because it not assigned any value . Output: It return’s “Sql” because Coalesce function return’s first non null value. Example 2: Coalesce in select statement. IF OBJECT_ID ( 'Employee' , 'U' ) IS NOT NULL DROP TABLE Employee CREATE TABLE Employee (   ID INT IDENTITY ( 1 , 1 ) PRIMARY KEY ,   NAME VARCHAR ( 20 ),   SALARY INT ) INSERT INTO Employee   ( NAME , SALARY ) VALUES ( 'Rakesh' , 5000 ),(NULL, 6000 ),( 'Naresh...

IDENTITY COLUMNS

Identity column specifies when ever new value is inserted into table. Identity column automatically inserted value into column. Identity Column can be specified at the time of creation of table. CREATE TABLE Employee (  EMPID INT IDENTITY ( 1 , 1 ),  EMPNAME VARCHAR ( 50 ),  SALARY INT ) In above table creation script EMPID column specifies IDENTITY property i.e., whenever a new row inserted into a Employee table EMPID Column will automatically value is inserted. INSERT INTO Employee ( EMPNAME , SALARY ) VALUES ( 'RAKESH' , 7000 ) INSERT INTO Employee ( EMPNAME , SALARY ) VALUES ( 'ALI' , 12000 ) SELECT * FROM Employee When u run above select statement is the following result is if u are trying insert value into identify columns .it will give error. INSERT INTO Employee ( EMPID , EMPNAME , SALARY ) VALUES ( 1 , 'RAKESH' , 7000 ) Msg 5...

Variables in T-SQL

Variables can be used to store the data in temporally based on data type. Variable name begin with @ symbol. There are two types of variables in T-SQL. 1.   Local Variables (It must begin @ symbol). 2.   Global Variables (it must begin @@ symbol) this variables also known as system variables. Syntax Declare a Variable DECLARE   @Variable-Name   DATATYPE EXAMPLE: DECLARE   @Name   VARCHAR ( 100 ) In before 2008 versions of SQL SERVER we declare a variable and assign a value in 2 lines.                 DECLARE   @Name   VARCHAR ( 100 ) SET   @Name = 'LeadFirstSQL' In 2008 and Later versions of SQL SERVER we declare a variable and assign a value in single line. DECLARE   @Name   VARCHAR ( 100 )   = 'LeadFirstSQL' Variables must be declare and used with the same batch. DECLARE   @Name   VARCHAR ( 100 ) ...