[jira] [Assigned] (CALCITE-1382) ClassCastException in JDBC Adapter

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

     [ https://issues.apache.org/jira/browse/CALCITE-1382?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde reassigned CALCITE-1382:
------------------------------------

    Assignee: Julian Hyde

> ClassCastException in JDBC Adapter
> ----------------------------------
>
>                 Key: CALCITE-1382
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1382
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.9.0
>         Environment: This bug was detected using a postgresql database and the calcite version 1.9.0.
>            Reporter: Miguel Oliveira
>            Assignee: Julian Hyde
>            Priority: Major
>              Labels: adapters, jdbc
>
> This query:
> {code}
> SELECT count(*) FROM (SELECT count(emp.empno) `Count Emp`, dept.dname `Department Name` FROM Calcite.emp emp JOIN Calcite.dept dept ON emp.deptno = dept.deptno JOIN Calcite.salgrade salgrade ON emp.comm = salgrade.hisal WHERE dept.dname LIKE '%O%' GROUP BY emp.deptno, dept.dname)
> {code}
> generates a ClassCastException: "org.apache.calcite.adapter.jdbc.JdbcRules$JdbcJoin cannot be cast to org.apache.calcite.adapter.enumerable.EnumerableRel".
> The plan is the following:
> {code}
> [TABLE, #ID {PLAN=EnumerableAggregate(group=[{}], EXPR$0=[COUNT()])
>   EnumerableAggregate(group=[{2, 4}])
>     JdbcJoin(condition=[=($1, $0)], joinType=[inner])
>       JdbcProject(hisal=[$2])
>         JdbcTableScan(table=[[Calcite, salgrade]])
>       JdbcJoin(condition=[=($1, $2)], joinType=[inner])
>         JdbcProject(comm=[$6], deptno=[$7])
>           JdbcTableScan(table=[[Calcite, emp]])
>         JdbcProject(deptno=[$0], dname=[$1])
>           JdbcFilter(condition=[LIKE($1, '%O%')])
>             JdbcTableScan(table=[[Calcite, dept]])
> , }]
> {code}
> Runnable test:
> {code}
> /** Test case for
>  * <a href="https://issues.apache.org/jira/browse/CALCITE-1382">[CALCITE-1382]
>  * ClassCastException in JDBC adapter</a>. */
> @org.junit.Test
> public void testJoinPlan3() throws DataSourceManagerException {
>     final String sql = "SELECT count(*) FROM (SELECT count(emp.empno) `Count Emp`, dept.dname `Department Name`\n"
>             + "FROM emp emp JOIN dept dept ON emp.deptno = dept.deptno\n"
>             + "JOIN salgrade salgrade ON emp.comm = salgrade.hisal\n"
>             + "WHERE dept.dname LIKE '%A%' GROUP BY emp.deptno, dept.dname)";
>     final String expected = "SELECT COUNT(*) FROM (\n" +
>             "SELECT count(\"emp\".empno) AS \"Count Emp\", \"dept\".dname AS \"Department Name\"\n" +
>             "FROM emp AS \"emp\"\n" +
>             "INNER JOIN (\n" +
>             "SELECT deptno, dname\n" +
>             "FROM dept\n" +
>             "WHERE dname LIKE '%A%'\n" +
>             ") AS \"dept\" ON \"emp\".deptno = \"dept\".deptno\n" +
>             "INNER JOIN (\n" +
>             "SELECT hisal \n" +
>             "FROM salgrade \n" +
>             ") AS \"salgrade\" ON \"emp\".comm = \"salgrade\".hisal " +
>             "GROUP BY \"emp\".deptno, \"dept\".dname" +
>             ") AS \"t\"";
>     sql(sql)
>             .schema(CalciteAssert.SchemaSpec.JDBC_SCOTT)
>             .ok(expected);
> }
> {code}



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