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Zoltan Haindrich commented on CALCITE-2934: ------------------------------------------- I don't see any "error" in the description; can you describe that? The rational behind it is that we can "push" negation down further... note that a "real" comparision forces the simplification logic to drop all special modes. I'm not sure what index implementation are you refering to; but I think it's up to the implementor to handle cases like this that. "many types of indexes do not support negative conditions": I think it's not the "index api"-s job to translate this back - more like the thing interacting with the index... > Simplification of a filter =($0, false) to NOT($0) ($0 is boolean) > ------------------------------------------------------------------ > > Key: CALCITE-2934 > URL: https://issues.apache.org/jira/browse/CALCITE-2934 > Project: Calcite > Issue Type: Bug > Reporter: Stamatis Zampetakis > Priority: Major > Fix For: 1.20.0 > > > The errors occur due to the simplification of a filter =($0, false) to > NOT($0) ($0 is boolean). The transformation is valid so in principle the > tests should not fail. However it makes me wonder if adding negation is > really a simplification. If I want to push this expression into an index > (e.g., B+Tree) I would have to rewrite it again to something equivalent to > =($0, false) since many types of indexes do not support negative conditions. -- This message was sent by Atlassian JIRA (v7.6.3#76005)