Truncate Equivalent command for Azure DocumentDB - azure-cosmosdb

Question

I have a collection with over 1000 json documents. I want to now delete all the documents in that collection.
Is there any way of doing it from the portal using a query?
PS: I know I can delete the collection and re-create it or use a c# application to do it.

Answer 1

No, there is no equivalent to the SQL DELETE expression in DocumentDB so there is no way to do it with a query. Here is a stored procedure (CoffeeScript) that does this for me when I want to delete based upon a query.
deleteSomeDocuments = (memo) ->
collection = getContext().getCollection()
unless memo?
memo = {}
if memo.returnDeleted
unless memo.deleted?
memo.deleted = []
else
memo.returnDeleted = false
stillQueuingOperations = true
query = () ->
if stillQueuingOperations
responseOptions =
pageSize: memo.remaining
setBody()
if memo.filterQuery?
memo.stillQueueing = collection.queryDocuments(collection.getSelfLink(), memo.filterQuery, responseOptions, onReadDocuments)
else
memo.stillQueueing = collection.readDocuments(collection.getSelfLink(), responseOptions, onReadDocuments)
onReadDocuments = (err, resources, options) ->
if err
throw err
if resources.length isnt memo.remaining
throw new Error("Expected memo.remaining (#{memo.remaining}) and the number of rows returned (#{resources.length}) to match. They don't.")
memo.stillQueueing = true
while memo.remaining > 0 and memo.stillQueueing
oldDocument = resources[memo.remaining - 1]
documentLink = oldDocument._self
etag = oldDocument._etag
options = {etag} # Sending the etag per best practice, but not handling it if there is conflict.
getContext().getResponse().setBody(memo)
memo.stillQueueing = collection.deleteDocument(documentLink, options)
if memo.stillQueueing
if memo.returnDeleted
memo.deleted.push(oldDocument)
memo.remaining--
setBody = () ->
getContext().getResponse().setBody(memo)
query()
return memo
exports.deleteSomeDocuments = deleteSomeDocuments