This is the first in a series of tips that present SQL code for a variety of utility stored procedures. These stored procedures are intended primarily for administrative purposes, and they are designed to be installed as system stored procedures. A system stored procedure is created in the master database with a prefix of "sp_". A system stored procedure is invoked like any other, but the "sp_" prefix tells SQL Server to look for the routine in the master database before looking elsewhere. Therefore, do not use the "sp_" prefix on a typical application stored procedure. A system stored procedure executes in the context of the current database even though it exists in the master database. This behavior makes system stored procedures great for implementing generic solutions to common tasks. It's helpful to use routines like these in any database.
I will start this series of tips by presenting a very simple stored procedure.
The SQL code in
The sp_ListObjects stored procedure references SQL Server system tables. You may find it's prudent to reject this approach for production application routines, but it should be fine for administrative work.
The sp_ListObjects stored procedure accepts three parameters. All three are optional. The first parameter is a list of specific object types to be included. The second parameter is a list of specific object types to be excluded. The third parameter selects between two default sets of object types to be included.
The first and second parameters are lists of object types separated by pipes (vertical bars). The effects of the parameters are combined with an AND operator, so typically only one of them would be used for a given call.
The third parameter takes effect only when the first two parameters are not specified (NULL). In that case, a zero (0) returns code objects and a one (1) returns structure objects. Code objects are defined as types V|P|FN|IF|TF|TR because such objects typically consist of SQL code. Structure objects are defined as types U|K|F|C|D|I because such objects define the structure of a database.
The object types are:
V - view
P - stored procedure
FN - user-defined function, scalar
IF - user-defined function, table-valued, in-line
TF - user-defined function, table-valued, multi-statement
TR - trigger
U - user table
K - constraint, primary key (or unique constraint)
F - constraint, foreign key
C - constraint, check
D - constraint, default
I - index
Refer to Books Online for more information about the different types of objects in a SQL Server database.
This example lists the structure objects from the Northwind database:
USE Northwind EXECUTE sp_ListObjects NULL,NULL,1
This example lists the views and stored procedures from the Northwind database:
USE Northwind EXECUTE sp_ListObjects 'V|P'
I hope you find this system stored procedure to be useful.
About the author: Brian Walker is a senior database architect in an IS department that uses SQL Server 2000 and the .NET Framework. He has over 25 years of experience in the IT industry with the last several years focused on databases and SQL Server. Brian is a software developer, database developer, database administrator, and database consultant. He develops utility software as a hobby, including a large collection of SQL Server utilities.
This was first published in May 2005