kgyrtkirk commented on issue #1044: [CALCITE-2838] Simplification: Remove redundant IS TRUE/IS NOT FALSE … URL: https://github.com/apache/calcite/pull/1044#issuecomment-463748212 sure, I'll include a brief explanation about why these work. I think we can only add these 4 right now. > By the way, why don't you consider IS_TRUE+UnknownAs.TRUE and other Unknown.As.TRUE cases? I think in that case the `[UAT] x IS_TRUE` actualy marks that we are switching from `UnknownAs.TRUE` to `UnknownAs.FALSE` ; so it can't be removed.
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