El 15/10/16 a les 20:53, Jens Alfke ha escrit:

[*] I have to insert records in the given order but the user may occasionally 
rearrange them.

What happens if the user makes a series of rearrangements that triggers a 
collision? It’s not that far fetched; all I have to do is, one at a time, drag 
ten records to right after one particular record. This is the kind of thing a 
good [read: malicious] tester will quickly figure out :)

I show a message "sorry, not enough internal space to complete the operation", but in around 10 years of several of these systems working 24x7 it never happened.

Luca Olivetti
Wetron Automation Technology http://www.wetron.es/
Tel. +34 93 5883004 (Ext.3010)  Fax +34 93 5883007
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