Automatically re-write non-sargable isnulls into sargable code in SSDT

Ed Elliott, 2015-12-10

“where ISNULL(column, ‘DontMatch’) = ‘Match’” – is kind of a bad thing to do in SQL as it means that any index on column can’t be used. It is a really simple thing that is a waste of time, fixing it is pretty simple but I see it a lot and so I thought it would be a perfect candidate for some SSDT Dev Pack t-sql re-writing :).

So the dev pack now has the ability to re-write any non-sargable IsNull statements into ones that are sargable (if you don’t know what sargable means and you are a SQL dev, look it up, it is really important!

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