| org.axiondb.functions.BaseFunction
 org.axiondb.functions.SubstringFunction
| SubstringFunction | | public class SubstringFunction extends BaseFunction implements ScalarFunction,FunctionFactory(Code) | | Syntax: SUBSTRING(str, m [,n]) -- m is one(1) based index.)
version:
$Revision: 1.10 $ $Date: 2005/05/10 00:15:21 $
author:
Sudhendra Seshachala
author:
Ahimanikya Satapathy
author:
Rupesh Ramachandran |
| SubstringFunction | | public SubstringFunction()(Code) | | Creates a new instance of Class
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| evaluate | | public Object evaluate(RowDecorator row) throws AxionException(Code) | | Returns substring of str, beginning at character m, n characters long.
If m is 0, it is treated as 1. If m is positive, it counts from the beginning
of str to find the first character. If m is negative, it counts backwards from the
end of str.
If n is omitted, it returns all characters to the end of str. If n is less
than 1, a null is returned.
Floating-point numbers passed as arguments to substr are automatically
converted to integers.
If m greater than length of str, return null. If m+n is bigger than length of
str, ignore n. if str is null, return null.
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| isValid | | public boolean isValid()(Code) | | |
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