[
https://issues.apache.org/jira/browse/DERBY-5525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13165351#comment-13165351
]
Rick Hillegas commented on DERBY-5525:
--------------------------------------
Thanks, Knut. There is a parallel problem in the lcase() function. Appendix D
of the JDBC spec doesn't give any guidance about what the return type of
lcase() and ucase() should be. Since the methods are supposed to operate on any
character expression (including CLOB-typed expressions), it may make sense to
type the return values as CLOB. We may already raise an exception if the result
doesn't fit in the maximum length for a CLOB.
It would be a shame if fixing this bug caused queries to perform worse because
a ucase() or lcase() expression became un-indexable. I am not sure that this is
an important enough bug to warrant a performance regression. Thanks.
> Precision for UPPER function is wrong if the returned value is longer than
> the literal argument
> -----------------------------------------------------------------------------------------------
>
> Key: DERBY-5525
> URL: https://issues.apache.org/jira/browse/DERBY-5525
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.8.2.2
> Reporter: Knut Anders Hatlen
>
> Seen in ij in a database with territory based collation and German locale:
> ==vv= COPIED FROM IJ CONSOLE =vv==
> ij> VALUES UCASE('Straßenbahn');
> 1
> -----------
> STRASSENBA&
> 1 Zeile ausgewählt
> ==================================
> And with JDBC calls:
> Connection c = DriverManager.getConnection(
> "jdbc:derby:memory:db;create=true;territory=de_DE;" +
> "collation=TERRITORY_BASED");
> Statement s = c.createStatement();
> ResultSet rs = s.executeQuery("values upper('Straße')");
> System.out.println(rs.getMetaData().getPrecision(1));
> rs.next();
> System.out.println(rs.getString(1));
> This prints
> 6
> STRASSE
> The precision is wrong, since the returned value is 7 characters long.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
