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https://issues.apache.org/jira/browse/DERBY-6037?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Unai Vivi closed DERBY-6037.
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Resolution: Not A Problem
Sorry guys, I screwed up, not a bug.
There were actually columns containing the "null" string in the DB. It took me
all afternoon to notice that (I should use more coffee!).
> 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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