[
https://issues.apache.org/jira/browse/DERBY-4411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Knut Anders Hatlen updated DERBY-4411:
--------------------------------------
Issue & fix info: [Repro attached] (was: [Repro attached, Patch Available])
Fix Version/s: 10.6.0.0
Committed revision 829022.
I'll leave the issue open until the fix has been back-ported to 10.5.
> Scalar subquery erroneously rejected for not returning exactly one row
> ----------------------------------------------------------------------
>
> Key: DERBY-4411
> URL: https://issues.apache.org/jira/browse/DERBY-4411
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.5.3.1, 10.6.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Fix For: 10.6.0.0
>
> Attachments: constantRestriction.diff, derby-4411-1a.diff
>
>
> This sequence of statements causes an error because the scalar sub-query
> supposedly doesn't return exactly one row, even though it does return exactly
> one row:
> ij> create table t (x int unique, y int);
> 0 rows inserted/updated/deleted
> ij> insert into t values (1,2);
> 1 row inserted/updated/deleted
> ij> select * from t where x > (values 1 union select y from t where 1=0);
> ERROR 21000: Scalar subquery is only allowed to return a single row.
> ij> values 1 union select y from t where 1=0;
> 1
> -----------
> 1
> 1 row selected
> Before DERBY-4391, the problematic statement would have caused a
> NullPointerException.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
