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From "jin xing (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CALCITE-3223) Non-RexInputRef may fails the matching of FilterToProjectUnifyRule during 'invert' by mistake.
Date Thu, 01 Aug 2019 04:56:00 GMT
jin xing created CALCITE-3223:
---------------------------------

             Summary: Non-RexInputRef may fails the matching of FilterToProjectUnifyRule during
'invert' by mistake.
                 Key: CALCITE-3223
                 URL: https://issues.apache.org/jira/browse/CALCITE-3223
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: jin xing


In current code of {{FilterToProjectUnifyRule::invert}}(https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/plan/SubstitutionVisitor.java#L1124),
 the implementation 
1. Fails the matching when there is Non-RexInputRef  in the projects
2. Didn't check if all {{exprList}} has already ben set correctly.
As a result below tests  fails.

{code:java}
  @Test public void testFilterToProject0() {
    String union =
        "select * from \"emps\" where \"empid\" > 300\n"
            + "union all select * from \"emps\" where \"empid\" < 200";
    String mv = "select *, \"empid\" * 2 from (" + union + ")";
    String query = "select * from (" + union + ") where (\"empid\" * 2) > 3";
    checkMaterialize(mv, query);
  }

  @Test public void testFilterToProject1() {
    String agg =
        "select \"deptno\", count(*) as \"c\", sum(\"salary\") as \"s\"\n"
            + "from \"emps\" group by \"deptno\"";
    String mv = "select \"c\", \"s\", \"s\" from (" + agg + ")";
    String query = "select * from (" + agg + ") where (\"s\" * 0.8) > 10000";
    checkNoMaterialize(mv, query, HR_FKUK_MODEL);
  }
{code}




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