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https://issues.apache.org/jira/browse/CALCITE-4683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
yanjing.wang updated CALCITE-4683:
----------------------------------
Fix Version/s: 1.30.0
Description:
The sql query is
{code:java}
SELECT * FROM (
SELECT '20210101' AS dt, deptno
FROM emp
GROUP BY deptno
) t
WHERE cast(deptno as varchar) in ('1')
{code}
When Calcite converts the in list to a join, the original leave rel will be
replaced by a new rel, but the new rel hasn't been set as a leave rel, This
will cause mismatched field type.
Finally, the query results java.lang.AssertionError: Conversion to relational
algebra failed to preserve datatypes.
was:
The sql query is
{code:java}
SELECT * FROM (SELECT '20210101' AS dt, deptno, max(cast(deptno2 as
varchar(200))) as m FROM (SELECT emp.deptno as deptno, dept.deptno as deptno2
FROM emp
JOIN dept on emp.deptno = dept.deptno) tmp GROUP BY deptno) WHERE cast(deptno as
varchar) in ('1', '3', '5')
{code}
When Calcite converts the in list to a join, the original relational algebra
root will be replaced by a new project, for example
When we set InSubQueryThreshold value to 2, then the relational algebra tree
will be converted from
{code:java}
LogicalProject(DT=['20210101'], DEPTNO=[$0], M=[$1])
LogicalAggregate(group=[{0}], M=[MAX($1)])
LogicalProject(DEPTNO=[$7], $f1=[CAST($9):VARCHAR(200) NOT NULL])
LogicalJoin(condition=[=($7, $9)], joinType=[inner])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
{code}
to
{code:java}
LogicalJoin(condition=[=($3, $4)], joinType=[inner])
LogicalProject(DT=['20210101'], DEPTNO=[$0], M=[$1],
DEPTNO0=[CAST($0):VARCHAR NOT NULL])
LogicalAggregate(group=[{0}], M=[MAX($1)])
LogicalProject(DEPTNO=[$7], $f1=[CAST($9):VARCHAR(200) NOT NULL])
LogicalJoin(condition=[=($7, $9)], joinType=[inner])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
LogicalAggregate(group=[{0}])
LogicalValues(tuples=[[{ '1' }, { '3' }, { '5' }]])
{code}
We can see that LogicalProject(DT=['20210101'], DEPTNO=[$0], M=[$1]) with
leaves being true has been replaced by LogicalProject(DT=['20210101'],
DEPTNO=[$0], M=[$1], DEPTNO0=[CAST($0):VARCHAR NOT NULL]) with leaves being
false.
Finally, the query results java.lang.AssertionError: Conversion to relational
algebra failed to preserve datatypes.
Due Date: 28/Jan/22
> In-list to join causes field datatypes not matched
> --------------------------------------------------
>
> Key: CALCITE-4683
> URL: https://issues.apache.org/jira/browse/CALCITE-4683
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.26.0, 1.27.0
> Environment: jdk8
>
> Reporter: yanjing.wang
> Assignee: yanjing.wang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.30.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The sql query is
> {code:java}
> SELECT * FROM (
> SELECT '20210101' AS dt, deptno
> FROM emp
> GROUP BY deptno
> ) t
> WHERE cast(deptno as varchar) in ('1')
> {code}
> When Calcite converts the in list to a join, the original leave rel will be
> replaced by a new rel, but the new rel hasn't been set as a leave rel, This
> will cause mismatched field type.
> Finally, the query results java.lang.AssertionError: Conversion to relational
> algebra failed to preserve datatypes.
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