Variable SQL in a CURSOR declaration

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Hi,

I have encounter a tricky problem today. I am trying to do the following....

1..Depending on a variable depends on what SQL statement I run
2..Where the problem is that I want to change the Select statement within the cursor
3..I am running a function

An example is as follows

SQL

DECLARE dupCursor CURSOR FAST_FORWARD

FOR SELECT IdNum, Name, Address, AgentName FROM vwEmployee where IdNum = @AidNum 

OPEN dupCursor
.
.
.

How can you put something like this in

SQL

DECLARE @sql VARCHAR(MAX)

IF IdNum = 0
SET @SQL = 'SELECT IdNum, IdNum2, Name, Address, AgentName FROM vwPRINTValuationNotice where IdNum = @AidNum
 
ELSE SET @SQL = 'SELECT IdNum, Name, Address, AgentName FROM vwPRINTValuationNotice where IdNum2 = @AidNum 


DECLARE dupCursor CURSOR FAST_FORWARD

FOR @sql

OPEN dupCursor
.
.
.

Posted 19-Feb-13 3:12am

Central_IT

Updated 19-Feb-13 3:19am

CHill60

v2

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Central_IT 19-Feb-13 10:56am

When I run the followiing I get the following error message

Incorrect syntax near '@SQL'. Expecting SELECT, or ')'

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CHill60 · Answer 1 · 2013-02-19T03:24:00

You will need to include the cursor declaration in the @SQL dynamic variable e.g.

SQL

DECLARE @SQL NVARCHAR(1024) -- or what ever the size
SET @SQL = 'DECLARE dupCursor CURSOR FOR SELECT IdNum, IdNum2, Name, Address, AgentName FROM vwPRINTValuationNotice where '

IF IdNum = 0
     SET @SQL = @SQL + 'IdNum = ' + @AidNum
ELSE 
     SET @SQL = SQL + 'IdNum2 = ' + @AidNum

Then use EXEC to execute the SQL

SQL

EXEC sp_executesql @SQL
OPEN dupCursor
FETCH NEXT FROM dupCursor INTO @NEWREF
WHILE @@FETCH_STATUS = 0
BEGIN
	PRINT @REF + ' ' + @NEWREF
	FETCH NEXT FROM dupCursor INTO @NEWREF
END
CLOSE dupCursor
DEALLOCATE dupCursor		
FETCH NEXT FROM CUR1 INTO @REF