Purge ALL from a collection RavenDB 4.0

[Ian Cross]

Hi guys,

I remember reading about a year ago that due to the way collections are now stored, one of the benefits of RavenDB 4.0 was it was very fast to purge all documents in a collection. Or maybe I was dreaming?

Previously we had something that would delete using DeleteByIndex on Raven/DocumentsByEntityName using the 'Tag' of the entity name. This would be done in a loop and waiting for WaitNonStaleResults until we were certain that the collection was 100% clear. Painful but it worked.

I can see examples in the documentation that use DeleteByIndex using a where clause and this is probably ok but if there is a really fast way that leverages the optimized thing potentially discussed a while ago that would be better.

We finally started our RavenDB 4.0 migration effort last night which is a bit daunting. We used RavenFS quite a bit and also RavenDB Authorization Bundle extensively for permisions - bit shocked to see that gone last night. 

Cheers,

Ian

[Derek den Haas]

DeleteByQueryOperation

https://github.com/ravendb/ravendb/blob/v4.0/src/Raven.Client/Documents/Operations/DeleteByQueryOperation.cs

store.Operations.Execute() or something

Or I guess DeletePrefixedCommandData

Op vrijdag 23 februari 2018 11:39:04 UTC+1 schreef Ian Cross:

[Andrej Krivulčík]

Have you seen this? https://groups.google.com/forum/#!msg/ravendb/-eX0Nun0xJE/SVwYpPawAgAJ

[Ian Cross]

Thanks Andrej / Derek,

We'll go down that road of using a DeleteByQuery - I wondered if there was anything new like a command to drop an entire collection without using a query but that's fine. 

Cheers,

Ian

[Arkadiusz Palinski]

Yes, that's the way to go. The query like:

from {CollectionName} 

doesn't require an index but it's handled directly by documents storage in very efficiently.

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