Here's a patch to add enable_material, per previous discussion. I still think we should add enable_joinremoval also, but there wasn't a clear consensus for that.
I'd appreciate it if someone could check this over for sanity - like, did I get all the places where materialize nodes can be created? and, did i prevent them from being inserted anywhere that they are necessary for correctness? Thanks, ...Robert
enable-material.patch
Description: Binary data
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