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https://issues.apache.org/jira/browse/DERBY-5557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kim Haase updated DERBY-5557:
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Attachment: DERBY-5557-2.zip
DERBY-5557-2.stat
DERBY-5557-2.diff
Attaching DERBY-5557-2.diff, DERBY-5557-2.stat, and DERBY-5557-2.zip, with the
following changed files:
M src/ref/rrefcase.dita
M src/ref/rrefcasenullif.dita
M src/ref/rrefsqlj19433.dita
M src/ref/refderby.ditamap
I created reltable entries in the map file for the three conditional expression
topics so that they cross-reference each other, and included the COALESCE topic
output in the zip so you can see that it too contains the reference.
Thanks in advance!
> NULLIF topic in reference manual should explain NULLIF
> ------------------------------------------------------
>
> Key: DERBY-5557
> URL: https://issues.apache.org/jira/browse/DERBY-5557
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 10.8.2.2
> Reporter: Knut Anders Hatlen
> Assignee: Kim Haase
> Attachments: DERBY-5557-2.diff, DERBY-5557-2.stat, DERBY-5557-2.zip,
> DERBY-5557.diff, rrefcasenullif.html
>
>
> The section describing NULLIF in the reference manual is a bit cryptic.
> http://db.apache.org/derby/docs/10.8/ref/rrefcasenullif.html
> It says that NULLIF is used for conditional expressions, and that it is
> similar to CASE, but it doesn't say in plain words how it works. It would be
> good if it could mention that NULLIF returns NULL if the two arguments are
> equal, and that it returns the first argument if they are not equal.
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