Query Optimization By Rick Mason, SeedChoices.com

Just because you can do something in ColdFusion Doesn’t always mean ColdFusion is the best way to do it

Always have the database do as much of the work as possible - Ben Forta

First step : Create Indexes Greatest performance boost with the least effort MS Access automatically indexes primary keys and foreign keys SQL Server doesn’t – you must do it yourself

SQL Server indexes Clustered Non-Clustered

Clustered Indexes Mostly for tables primary key Only one clustered index per table Orders tables data in order you specify

Non-Clustered Indexes You can have multiple non-clustered indexes An important tool in query optimization All non-clustered indexes go through tables clustered index if one is available

Using SQL Server query analyzer

Second step: Stored procedures What is a stored procedure? Pre-compiled SQL statement residing in the database You can pass parameters in You can receive result sets(s) out

Why use stored procedures? Pre-compile once, use many times Stored procedure is a re-usable object Reduce network traffic Separate business rules and logic from presentation layer They’re faster

Writing stored procedures Create procedure[name] Input parameters Output parameters AS Declare local variables SQL statement

Stored procedure example

Calling stored procedures – Using CFQuery {CALL USP_CompanyProductList('#CompanyDistrictID#')}

Calling Stored Procedures - Using cfstoredproc <cfstoredproc procedure=“DealInv” Datasource=“MyData”> <cfprocparam type=“IN” Cfsql type = “CF_SQL_Integer” Value=‘#CompanyDistrictID#’>

You need to use cfstoredproc If you need more than one result set You’re using Oracle or DB2

Running a stored procedure CFQuery or CFStoredProc goes here Your query produced an error #Catch.Detail#

Stored procedure – Insert example Create Procedure varchar(20) AS INSERT Into Person(PersonUserName, Select AS PersonID

What about MS Access? CFStoredProc can call stored Access queries and pass variables CFQUERY CALL will run queries but not let you pass variables Make sure cfadministrator has execute remote procedures turned on for your data source

Calling a stored procedure in Access

Automating Stored Procedure Creation With the Stored Procedure Wizard ftp://ftp.productivityenhancement.com/storedprocwiz10.zip By the folks at ColdFusionTraining.com

Additional references Using Stored Procedures by Ian Rutherford in CF Dev. Journal – Oct, Dec 2001 & Feb, May 2002 Stored Procedures in Access by Charlie Arehart in CF Dev. Journal – Oct 1999 MS SQL Server 7 Administrators Guide by Ron Talmage – ISBN

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