jinxing64 commented on issue #1468: [CALCITE-3366] RelDecorrelator supports Union URL: https://github.com/apache/calcite/pull/1468#issuecomment-535932476 Hi @hsyuan @danny0405 In previous change, I failed the decorrelation of Union when input frames have different correlated variables or different old-new output mappings. Now in the current one, I resolve the limitation: 1. when input frames with different correlated variables, I widen the frame by "value generator" 2. when input frames with different old-new output mappings, I permute by a 'Project' Really appreciate if you can take another look when you have time. Also gentle ping @julianhyde . Please give some advice if I'm on the right direction.
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