[
https://issues.apache.org/jira/browse/DERBY-6037?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Unai Vivi updated DERBY-6037:
-----------------------------
Priority: Minor (was: Major)
Description:
ResultSet.getString() doesn't return null on SQL NULL columns of type VARCHAR;
it returns the string "null" instead.
I tried derby versions 10.8.2.2 and 10.9.1.0 (derby.jar - embedded) and both
show the same behaviour.
ResultSet javadocs state that the returned value shall be "the column value; if
the value is SQL NULL, the value returned is null" (null, not the String
containing n-u-l-l of .length() 4).
I'm not sure if this bug report belongs here or on Oracle's ResultSet
implementation.
was:
ResultSet.wasNull() returns false after a ResultSet.getString("COLUMNNAME") on
a null VARCHAR field.
I tried derby versions 10.8.2.2 and 10.9.1.0 (derby.jar - embedded) and both
show the same behaviour.
E.g.
<pre>
ResultSet rs = null;
//[...]
rs = s.executeQuery("select EXAMPLE_PK,BLAHBLAH,COLUMN from MYTABLE
order by EXAMPLE_PK desc");
while (rs.next())
{
//[...]
String myStr = rs.getString("COLUMN");//all rows have SQL null
for field COLUMN
if (rs.wasNull())
{//never gets here
//[...]
}
//[...]
</pre>
Urgency: Low (was: Normal)
Summary: ResultSet.getString() doesn't return null on SQL NULL columns
(was: ResultSet.wasNull() returns false for null VARCHAR columns)
> ResultSet.getString() doesn't return null on SQL NULL columns
> -------------------------------------------------------------
>
> Key: DERBY-6037
> URL: https://issues.apache.org/jira/browse/DERBY-6037
> Project: Derby
> Issue Type: Bug
> Components: JDBC, SQL
> Affects Versions: 10.8.2.2, 10.9.1.0
> Environment: Java 7u7
> Reporter: Unai Vivi
> Priority: Minor
>
> ResultSet.getString() doesn't return null on SQL NULL columns of type
> VARCHAR; it returns the string "null" instead.
> I tried derby versions 10.8.2.2 and 10.9.1.0 (derby.jar - embedded) and both
> show the same behaviour.
> ResultSet javadocs state that the returned value shall be "the column value;
> if the value is SQL NULL, the value returned is null" (null, not the String
> containing n-u-l-l of .length() 4).
> I'm not sure if this bug report belongs here or on Oracle's ResultSet
> implementation.
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