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https://issues.apache.org/jira/browse/DERBY-4380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-4380:
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Attachment: on_subquery.diff
Attached is a patch (not for commit) that removes the restriction that ON
clauses can't contain subqueries. It also adds a test case to JoinTest and
updates negative test cases in lang/outerjoin.sql, lang/innerjoin.sql and
lang/lojreorder.sql so that they expect results to be returned instead of an
exception.
With this patch, two of the test cases in lang/lojreorder.sql that used to
raise ERROR 42972, now raise a NullPointerException. The stack trace looks
similar to DERBY-4342. The patch should not be committed until this has been
investigated and dealt with.
> SOME not allowed in ON clause
> -----------------------------
>
> Key: DERBY-4380
> URL: https://issues.apache.org/jira/browse/DERBY-4380
> Project: Derby
> Issue Type: Bug
> Components: Store
> Reporter: Bernt M. Johnsen
> Attachments: on_subquery.diff
>
>
> SOME is not allowed in ON-clause:
> ij> create table t1 (i integer);
> 0 rows inserted/updated/deleted
> ij> create table t2 (i integer);
> 0 rows inserted/updated/deleted
> ij> create table t3 (i integer);
> 0 rows inserted/updated/deleted
> ij> insert into t1 values (1);
> 1 row inserted/updated/deleted
> ij> insert into t2 values (2);
> 1 row inserted/updated/deleted
> ij> insert into t3 values 2,3,4;
> 3 rows inserted/updated/deleted
> ij> select * from t1 where t1.i = some (select i from t3);
> I
> -----------
> 0 rows selected
> ij> select * from t1 inner join t2 on t1.i = some (select i from t3);
> ERROR 42972: An ON clause associated with a JOIN operator is not valid.
> ij>
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