[jira] [Created] (CALCITE-5253) Join fields validation partially broken after CALCITE-5171

["Evgeny Stanilovsky (Jira)" <ji...@apache.org>]

Evgeny Stanilovsky created CALCITE-5253:
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             Summary: Join fields validation partially broken after CALCITE-5171
                 Key: CALCITE-5253
                 URL: https://issues.apache.org/jira/browse/CALCITE-5253
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.31.0
            Reporter: Evgeny Stanilovsky
            Assignee: Evgeny Stanilovsky


Such issue is not possible for now: 
{code:java}
CREATE TABLE t1(a INTEGER, b INTEGER, c INTEGER);
CREATE TABLE t2(b INTEGER, c INTEGER, d INTEGER);
CREATE TABLE t3(c INTEGER, d INTEGER, e INTEGER);

SELECT t1.c, t2.d, t1.b, t1.a, t3.e FROM t1 natural join t2 natural join t3 WHERE t1.a=1;
{code}

cause:


{noformat}
SqlValidatorException: Column name 'C' in NATURAL join or USING clause is not unique on one side of join
{noformat}


Was broken by:
[1] https://issues.apache.org/jira/browse/CALCITE-5171

So this is a regression.



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