11moon11 opened a new pull request #1637: [CALCITE-3571] Disable RelBuilder#shouldMergeProject by default due to an exception URL: https://github.com/apache/calcite/pull/1637 RelBuilder#shouldMergeProject should be false by default, due to causing an exception when JOINs with complex conditions are involved. By complex condition I mean when joining on fields indirectly, ex: `ON (cast(query.empno as Integer) = cast(emp.empno as Integer))`. CC: @julianhyde
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