yanlin-Lynn commented on issue #1478: [CALCITE-3378] AssertionError for checking RexNode implify URL: https://github.com/apache/calcite/pull/1478#issuecomment-536431021 > I think we get to answer if it's valid to remove the CAST in InputUsageFinder here. I don't understand why we need to check the remove of CAST. I think the remove of CAST is necessary for the later compare of RexNode.
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