How to increase length of Customer id column

Hello everybody,

today I want to describe interesting case. Recently I was asked to increase length of Customer ID at page AR303000.

As usually such tasks can be achieved via creating extension to DAC class with setting new length, 

and with SQL statement that increases length of column. But that is not the case with Customer ID. That is because

Customer ID is Segmented Selector. And everything related to segmented selectors should be managed 

at page Segmented Keys page ( CS202000 ). All that is needed to be done is increasing the Length field of segmented keys.

Other approaches can lead to corruption of segmented keys. Especially if you decide to do it in database with DB scripts. 

At screenshot below you can see how to change field length to 30:

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