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https://issues.apache.org/jira/browse/DERBY-4712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dag H. Wanvik updated DERBY-4712:
---------------------------------
Attachment: derby4712a.diff
derby4712a.stat
Uploading a patch which embodies the proposed fix, and a new test case fixture
in OuterJoinTest; testDerby_4712_NPEs, which contains the original queries that
received the NPEs.
Regressions ran OK. Please review.
> Complex nested joins problems
> -----------------------------
>
> Key: DERBY-4712
> URL: https://issues.apache.org/jira/browse/DERBY-4712
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.6.1.0
> Reporter: Thomas Mueller
> Assignee: Dag H. Wanvik
> Priority: Minor
> Fix For: 10.7.0.0
>
> Attachments: assert-bind-opt-trees.log, assert-bind-opt-trees.txt,
> derby.log.analyzed, derby.log.simpler, derby4712a.diff, derby4712a.stat,
> drawing.txt
>
>
> I ran a randomized test for nested joins against PostgreSQL, Derby, and H2,
> and found some problems with Derby. The queries below throw
> NullPointerExceptions; the last query an assertion. The test case is here:
> http://code.google.com/p/h2database/source/browse/trunk/h2/src/test/org/h2/test/db/TestNestedJoins.java
> . There are probably shorter queries that are problematic, but I can't test
> it because Derby closes the connection after the assertion.
> create table t0(x int);
> create table t1(x int);
> create table t2(x int);
> create table t3(x int);
> create table t4(x int);
> insert into t4 values(0);
> insert into t4 values(1);
> insert into t4 values(2);
> insert into t4 values(3);
> create table t5(x int);
> insert into t5 values(0);
> insert into t5 values(1);
> insert into t5 values(2);
> insert into t5 values(3);
> insert into t5 values(4);
> create table t6(x int);
> insert into t6 values(0);
> insert into t6 values(1);
> insert into t6 values(2);
> insert into t6 values(3);
> insert into t6 values(4);
> insert into t6 values(5);
> create table t7(x int);
> insert into t7 values(0);
> insert into t7 values(1);
> insert into t7 values(2);
> insert into t7 values(3);
> insert into t7 values(4);
> insert into t7 values(5);
> insert into t7 values(6);
> create table t8(x int);
> insert into t8 values(0);
> insert into t8 values(1);
> insert into t8 values(2);
> insert into t8 values(3);
> insert into t8 values(4);
> insert into t8 values(5);
> insert into t8 values(6);
> insert into t8 values(7);
> create table t9(x int);
> insert into t9 values(0);
> insert into t9 values(1);
> insert into t9 values(2);
> insert into t9 values(3);
> insert into t9 values(4);
> insert into t9 values(5);
> insert into t9 values(6);
> insert into t9 values(7);
> insert into t9 values(8);
> insert into t0 values(1);
> insert into t1 values(2);
> insert into t0 values(3);
> insert into t1 values(3);
> insert into t2 values(4);
> insert into t0 values(5);
> insert into t2 values(5);
> insert into t1 values(6);
> insert into t2 values(6);
> insert into t0 values(7);
> insert into t1 values(7);
> insert into t2 values(7);
> insert into t3 values(8);
> insert into t0 values(9);
> insert into t3 values(9);
> insert into t1 values(10);
> insert into t3 values(10);
> insert into t0 values(11);
> insert into t1 values(11);
> insert into t3 values(11);
> insert into t2 values(12);
> insert into t3 values(12);
> insert into t0 values(13);
> insert into t2 values(13);
> insert into t3 values(13);
> insert into t1 values(14);
> insert into t2 values(14);
> insert into t3 values(14);
> insert into t0 values(15);
> insert into t1 values(15);
> insert into t2 values(15);
> insert into t3 values(15);
> select t0.x , t1.x , t2.x , t3.x , t4.x , t5.x , t6.x , t7.x , t8.x from
> (((t0 inner join ((t1 right outer join (t2 inner join t3 on t2.x = t3.x ) on
> t1.x = t2.x ) left outer join (t4 inner join t5 on t4.x = t5.x ) on t1.x =
> t4.x ) on t0.x = t2.x ) left outer join (t6 inner join t7 on t6.x = t7.x ) on
> t1.x = t6.x ) inner join t8 on t5.x = t8.x );
> select t0.x , t1.x , t2.x , t3.x , t4.x , t5.x , t6.x , t7.x from ((t0 right
> outer join t1 on t0.x = t1.x ) inner join (((t2 inner join (t3 left outer
> join t4 on t3.x = t4.x ) on t2.x = t3.x ) right outer join t5 on t2.x = t5.x
> ) left outer join (t6 inner join t7 on t6.x = t7.x ) on t4.x = t6.x ) on t0.x
> = t5.x );
> select t0.x , t1.x , t2.x , t3.x , t4.x , t5.x , t6.x , t7.x from ((((t0 left
> outer join t1 on t0.x = t1.x ) right outer join t2 on t0.x = t2.x ) right
> outer join t3 on t0.x = t3.x ) inner join ((t4 inner join t5 on t4.x = t5.x )
> right outer join (t6 right outer join t7 on t6.x = t7.x ) on t4.x = t6.x ) on
> t1.x = t4.x );
> select t0.x , t1.x , t2.x , t3.x , t4.x , t5.x from (((t0 inner join t1 on
> t0.x = t1.x ) right outer join (t2 right outer join t3 on t2.x = t3.x ) on
> t0.x = t2.x ) inner join (t4 left outer join t5 on t4.x = t5.x ) on t1.x =
> t4.x );
> select t0.x , t1.x , t2.x , t3.x , t4.x , t5.x , t6.x from ((t0 right outer
> join (t1 right outer join (t2 left outer join (t3 left outer join t4 on t3.x
> = t4.x ) on t2.x = t3.x ) on t1.x = t3.x ) on t0.x = t1.x ) left outer join
> (t5 inner join t6 on t5.x = t6.x ) on t2.x = t5.x );
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