troubleshooting Question

Error handling in a stored procedure

Avatar of YZlat
YZlatFlag for United States of America asked on
Microsoft SQL ServerMicrosoft SQL Server 2008
5 Comments1 Solution256 ViewsLast Modified:
In my database i have a temp table that contains index information, including database name, schema name, table name, index name, index fragmentation percentage

based on fragmentation percentage I either rebuild or reorganize the index using the following code:




-- reorganize or rebuild indexes
	SET @sSQL = ''

	SELECT @sSQL = @sSQL + 
           CASE WHEN FragPercent > 30 THEN
		' ALTER INDEX ' + QUOTENAME(IndexName) + ' ON '
		+ QUOTENAME(DatabaseName) + '.'
		+ QUOTENAME(SchemaName) + '.'
		+ QUOTENAME(TableName) + ' REBUILD WITH ( SORT_IN_TEMPDB = ON, ONLINE = ON );'
            ELSE
                ' ALTER INDEX ' + QUOTENAME(IndexName) + ' ON '
		+ QUOTENAME(DatabaseName) + '.'
	        + QUOTENAME(SchemaName) + '.'
                + QUOTENAME(TableName) + ' REORGANIZE;'
            END
                
	FROM ##IndexFragmentation
	WHERE (FragPercent <= 30) OR (FragPercent > 30 AND [IsComplex]=0)
	--WHERE FragPercent > 5

	SELECT @sSQL

	EXECUTE sp_executesql @sSQL

The issue here is that if at some point in time one of the indexes is removed before this code it executed, that would throw an exception and my stord procedure would crash. So I wanted to add an error handling in the form of try catch to trap the error. What I need help with is how to ensure that whenever the error is trapped, the code continues to run for all the remaining indexes.

Can anyone help?
ASKER CERTIFIED SOLUTION
Steve Wales
Senior Database Administrator

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