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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