[jira] [Created] (CALCITE-4366) LatticeSuggester should treat UNION / VALUES sub-expressions as tables

["Julian Hyde (Jira)" <ji...@apache.org>]

Julian Hyde created CALCITE-4366:
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             Summary: LatticeSuggester should treat UNION / VALUES sub-expressions as tables
                 Key: CALCITE-4366
                 URL: https://issues.apache.org/jira/browse/CALCITE-4366
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde


LatticeSuggester should treat UNION / VALUES sub-expressions as tables, and generate a LatticeTable for each.

If those expressions occur as a common-table expression (CTE; i.e. in the WITH clause) the LatticeTable should have the name and column names of that CTE.

For example, given the query
{code}
WITH SubDept (id, name) AS (SELECT deptno, dname FROM Dept)
SELECT *
FROM Emp AS e
JOIN SubDept AS d ON e.deptno = d.id
{code}
{{LatticeSuggester}} should generate {{LatticeTable(Emp (empno, deptno, ename, sal))}} and {{LatticeTable(SubDept (id, name))}}.



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