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function to return table name

Posted on 2008-10-01
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Last Modified: 2012-08-14
From a stored procedure, can I call a custom function that will return the table name I want to use in my SQL syntax?

thanks in advance,
Bill
ALTER FUNCTION [GetTableName](@Criteria VARCHAR(1))

RETURNS varchar(50)

AS

BEGIN

DECLARE @Output varchar(50)

SET @Output = ''
 

SELECT @Output = 

CASE WHEN @Criteria = 'A' THEN 'TABLE_A'

WHEN @Criteria = 'B' THEN 'TABLE_B'

WHEN @Criteria = 'C' THEN 'TABLE_C'

END
 

RETURN @Output

END
 
 
 

Create PROCEDURE [dbo].[sp_TestStoreProc]

 SELECT TOP 1 * FROM + GetTableName('B') 

END

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Question by:woyler
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LVL 60

Expert Comment

by:chapmandew
ID: 22618645
have to change your proc around bit:

Create PROCEDURE [dbo].[sp_TestStoreProc]
BEGIN
declare @x nvarchar(3000)
set @x = ' SELECT TOP 1 * FROM '+ GetTableName('B')
exec sp_executesql @x
END
0
 
LVL 60

Accepted Solution

by:
chapmandew earned 250 total points
ID: 22618653
also, have to include dbo. on your function call

Create PROCEDURE [dbo].[sp_TestStoreProc]
BEGIN
declare @x nvarchar(3000)
set @x = ' SELECT TOP 1 * FROM '+ dbo.GetTableName('B')
exec sp_executesql @x
END
0
 

Author Closing Comment

by:woyler
ID: 31502150
Perfect.  Thank you for the quick response.
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