Juergen E. Fischer c6a4bb86aa context_help/function_help:
- remove en_US postfix
- remove translated files (translation were moved to ts files earlier)
- remove unused jQuery (python help doesn't use it anymore)
- change expression label in QgsQueryBuilder and add context help (partly fixes
  #8129)
2013-06-21 23:59:40 +02:00

29 lines
826 B
Plaintext

<h3>CASE expression</h3>
A conditional expression that can be used to evaluate multiple expressions and
return a result.
<h4>Syntax</h4>
<pre>
CASE
WHEN <i>condition</i> THEN <i>result</i>
[ ...n ]
[ ELSE <i>result</i> ]
END
</pre>
[ ] marks optional components
<h4>Arguments</h4>
<!-- List args for functions here-->
<i> WHEN condition</i> - The condition expression to evaluate. <br>
<i> THEN result</i> - If <i>condition</i> evaluates to True then <i>result</i> is evaluated and returned. <br>
<i> ELSE result</i> - If none of the above conditions evaluated to True then <i>result</i> is evaluated and returned. <br>
<h4>Example</h4>
<!-- Show example of function.-->
<pre>
CASE
WHEN <i>"column" IS NULL</i> THEN <i>'None'</i>
ELSE <i>"column"</i>
END
</pre>