[FEAT] convert blocking rules to DNF

[NickCrews]

In the docs it suggests to avoid blocking rules with OR, because that prevents the engine from using a hash join.

But I think we can take care of this for users. can we use https://sqlglot.com/sqlglot/optimizer/normalize.html#normalize to convert whatever rules they give us into DNF, and then split this up on the ORs to get our disjoint blocking rules, all which contain only ANDs?

[RossKen]

Hey @NickCrews - this is really cool! I wasn't aware of that function in sqlglot - this is definitely something that would be great to implement under the hood then we can change the docs 😊

[RossKen]

Possibility to use this normalize function to flag more performant blocking rules to users, rather than fixing it under the hood. Slightly hesitant to just fix things in the background.

[NickCrews]

yeah that is a good thing to think about. But, I'm trying to think of a situation where just optimizing it for users wouldn't be the correct thing to do, and I'm drawing a blank...can you think of one?