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ReGenerate NTree from SQL

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Hi there


Has anyone had any success in managing this from SQL ? We have an external ERP system which handles all categorization which is then updated in the Prestashop database. This is done using Inserts and updates. However, this does not take care of the calculation of depth and nleft and nright, and eventhough I know a little PHP, I can't seem to get my head around the function that generates the ntree and how it works.


So have anyone tried to achieve this using SQL ?




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