ISALLNULL Aggregate Function extension

Megha Nidhi Dahal

Hello Community,<br />
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The attached aggregate function extension returns true if all the values supplied are null.<br />
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This becomes very useful while handling visibility expressions. Eg: If all values for a particular column are null, the ISALLNULL("column") will return true. This lets you hide the entire column along with the header.<br />
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I'll be checking in the code along with some other set of functions in some weeks time.<br />
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To make this function available for your use, download the attached jar and place it in the plugins/dropins folder of your eclipse (BIRT designer). Later while creating a computed column in dataSet, you can find the ISALLNULL function in the list.<br />
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Please evaluate it and let me know if you like to see any other aggregate function extension.<br />
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[Update: 05-Dec-2011:] Added the source code.<br />
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Best Regards<br />
Megha