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Sql Server dynamic filtering in a Stored procedure

Posted on 2008-10-10
5
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Last Modified: 2012-05-05
Hello,
I am writing the following stored procedure, i want depending on the input parameter to set the filter expression of the where clause,
But i am getting errors, can someone help please?
ALTER PROCEDURE [dbo].[interConfParam] 
(
 
@PType nvarchar(20)
)
 
AS
BEGIN
DECLARE @ProductType nvarchar(50)
SELECT @ProductType = CASE @PType WHEN 'ALL' THEN 'IN ('Body', 'Plug')' ELSE @Ptype END 
SELECT     S2ID, ProductType
FROM         SrDDW
WHERE     (ProductType = @ProductType)
 
END

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Question by:Nyana22
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5 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 22686333
this will do:
ALTER PROCEDURE [dbo].[interConfParam] 
(
 
@PType nvarchar(20)
)
 
AS
BEGIN 
SELECT     S2ID, ProductType
FROM         SrDDW
WHERE   (   ( @PType = 'ALL' AND ProductType IN ('Body', 'Plug'))
         OR ( ProductType =  @PType )
        )

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0
 
LVL 60

Expert Comment

by:chapmandew
ID: 22686348
ALTER PROCEDURE [dbo].[interConfParam]
(
 
@PType nvarchar(20)
)
 
AS
BEGIN
DECLARE @sql nvarchar(4000)
DECLARE @ProductType nvarchar(50)
SELECT @ProductType = CASE @PType WHEN 'ALL' THEN 'IN ('Body', 'Plug')' ELSE @Ptype END
SET @sql = 'SELECT     S2ID, ProductType
FROM         SrDDW
WHERE     (ProductType IN(' + CASE @Ptype When 'ALL' THEN '''Body'', ''Plug''' ELSE @PType END + ')'
exec sp_executesql @sql
END
 
0
 
LVL 92

Expert Comment

by:Patrick Matthews
ID: 22686377
ALTER PROCEDURE [dbo].[interConfParam]
(
 
@PType nvarchar(20)
)
 
AS
BEGIN
DECLARE @ProductType nvarchar(50), @sql varchar(max)

SET @sql = 'SELECT S2ID, ProductType FROM SrDDW WHERE ProductType '

IF @PType = 'ALL'
    SET @sql = @sql + 'IN (''Body'', ''Plug'')'
ELSE
    SET @sql = @sql + '= ''' + @Ptype + ''''
END

EXEC(@sql)
 
END
0
 
LVL 92

Expert Comment

by:Patrick Matthews
ID: 22686382
Guess I need more coffee :)
0
 

Author Comment

by:Nyana22
ID: 22686400
:D
0

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