Imho, the 2nd way is more normalized - you don't keep the same information (fullpath) twice. If you are afraid of join-effectivity, use some tool which imagines how is that query realized, in postgres it is 
explain analyze select fullpath...

[download]
Something about database normal form:
http://www.databasejournal.com/sqletc/article.php/26861_1428511_4

In reply to Re: Relation between tables by pajout
in thread Relation between tables by Ace128

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