hi all, Upsert is usually defined [1] in reference to a violating a unique key: > Insert, if unique constraint violation then update; or update, if not found then insert. Is this theoretically preferable to just looking for a row that matches certain criteria, updating it if found or inserting otherwise? For an example of the latter approach, see MongoDB's flavor of upsert [2]. You just give it a "query" and an "update". It seems to me this is better because it functions correctly whether or not an index is in place. Best, thanks, Seamus [1] http://postgresql.uservoice.com/forums/21853-general/suggestions/245202-merge-upsert-replace [2] http://docs.mongodb.org/manual/reference/method/db.collection.update/ -- Seamus Abshere, SCEA https://github.com/seamusabshere
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