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https://issues.apache.org/jira/browse/CALCITE-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17060576#comment-17060576
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fa zheng commented on CALCITE-3850:
-----------------------------------
queru1: select * from (select * from emps)e join (select * from depts)d on
(case when e.deptno=1 then e.deptno else e.deptno end) = d.deptno join (select
* from sdepts)f on (case when e.deptno=1 then e.deptno else e.deptno end)
=f.deptno;
query2: select * from (select * from emps)e join (select
{color:red}deptno{color} from depts)d on (case when e.deptno=1 then e.deptno
else e.deptno end) = d.deptno join (select * from sdepts)f on (case when
e.deptno=1 then e.deptno else e.deptno end) =f.deptno;
query3: select * from (select {color:red}empno,name,deptno {color}from emps)e
join (select * from depts)d on (case when e.deptno=1 then e.deptno else
e.deptno end) = d.deptno join (select * from sdepts)f on (case when e.deptno=1
then e.deptno else e.deptno end) =f.deptno;
I distinguish the differences of SQL with red color. For query1, both them can
run successfully. For query2, only calcite can run successfully. For query3,
both them run failed.
> AssertionError when converts a SQL parse tree into a relational algebra
> expression
> ----------------------------------------------------------------------------------
>
> Key: CALCITE-3850
> URL: https://issues.apache.org/jira/browse/CALCITE-3850
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.21.0
> Reporter: fa zheng
> Priority: Major
>
> I execute following sql with calcite 1.21.0 in flink 1.10. When the two
> conditions of left outer join are like"ON t1.a=t2.a" and "ON t1.a=t3.a ", it
> execute successfully. However, when the two conditions of left outer join are
> like "ON IF(t1.a='...',CAST(RAND(123) AS STRING),t1.a)=t2.a" and "ON
> IF(t1.a='...',CAST(RAND(123) AS STRING),t1.a)=t3.a", it gets a assert error
> in method getRootField.
> It also can execute successfully with "ON t1.a=t2.a" and "ON
> IF(t1.a='...',CAST(RAND(123) AS STRING),t1.a)=t3.a".
> But failed with "ON IF(t1.a='...',CAST(RAND(123) AS STRING),t1.a)=t2.a" and
> "ON t1.a=t3.a"
> SELECT
> ...
> FROM
> (
> SELECT
> ...
> ) t1
> LEFT OUTER JOIN
> (
> SELECT
> ...
> ) t2
> ON ...
> LEFT OUTER JOIN
> (
> SELECT
> ...
> ) t3
> ON ...
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