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                                            Xiening Dai

[CALCITE-3455] Redundant rule firing for both logical and physical nodes

For ProjectMergeRule, EnumerableLimitRule and SortRemoveConstantKeysRule, once they are done with the transformation on logical nodes, there's no need to fire these rules on physical nodes again. So limit these rule...

discussion-in-jira

[CALCITE-3963] Maintains logical properties at RelSet (equivalent gro…

…up) instead of RelNode 1. Add new LogicalNode interface that supports reporting stats estimation confidence. 2. Re-purpose set.rel and rename it into set.originalRel to report logical properties of RelSet. 3....