Proper way to handle 'optional' where clause filters in SQL?

Question

Let\'s say you have a stored procedure, and it takes an optional parameter. You want to use this optional parameter in the SQL query. Typically this is how I\'ve seen it don

Answer 1

This is another variation on the optional parameter technique:

SELECT * FROM dbo.MyTableName t1
WHERE t1.ThisField = 'test'
AND t1.MyField = COALESCE(@MyOptionalParam, t1.MyField)

I'm pretty sure it will have the same performance problem though. If performance is #1 then you'll probably be stuck with forking logic and near duplicate queries or building strings which is equally painful in TSQL.