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-6408) EXISTS returns NULL instead of FALSE
Date Fri, 08 Nov 2013 09:28:23 GMT
Knut Anders Hatlen created DERBY-6408:

             Summary: EXISTS returns NULL instead of FALSE
                 Key: DERBY-6408
                 URL: https://issues.apache.org/jira/browse/DERBY-6408
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions:
            Reporter: Knut Anders Hatlen

The reference manual topic on Boolean expressions - http://db.apache.org/derby/docs/10.10/ref/rrefsqlj23075.html
- says that EXISTS should return FALSE if the subquery returns no rows. In reality, it returns

ij> create table t(x int);
0 rows inserted/updated/deleted
ij> values exists(select * from t);

1 row selected

SQL:2011, part 2, 8.10 <exists predicate> also says that FALSE is the correct result
if the cardinality is 0.

This message was sent by Atlassian JIRA

View raw message