db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4411) Scalar subquery erroneously rejected for not returning exactly one row
Date Thu, 15 Oct 2009 20:51:31 GMT
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: 10.6.0.0
            Reporter: Knut Anders Hatlen


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.


Mime
View raw message