Manually created my collection with my edge collection name within the db interface. When I attempted to do an import as you would a document collection, it would create a document collection followed by related issues of import an edge to a document collection. My issue was that I was trying to do a bulk import of NSJ of my edges. I ended up going about this in a different way by using the API. Since that's the first step to selecting a collection to reference, I haven't actually gotten to the step of trying to add to an edge collection that already exists. The first step doesn't allow for changing the collection to any type other than document. However, when I try to adapt this to creating an edge collection or adding an edge to an edge collection, it doesn't work. UsersCollection= db.createCollection(name = "Users") The ArangoDB documentation includes how to create a document collection and a document in that collection: Shard key, as this allows the lookup to be restricted to a single shard.I'm trying to write a python script to create an edge collection and insert edges into my arango database. Ideally, the search expression contains the The lookup attribute(s) from the search expression should be indexed in order IntermediateCommit thresholds for data and operation counts. In order to avoid this issues you can increase the Would hit the same document multiple times, and only if you have large This will only be an issue if you write a query where your search condition Have the side-effect that atomicity of this operation cannot be guaranteedĪnymore and that ArangoDB cannot guarantee to that read your own writes in This intermediateĬommit will write the data that has been modified so far. UPSERT over all documents inĪ collection) an intermediate commit can be triggered. Using very large transactions in an UPSERT (e.g. Helps avoiding conflicts but is bad for throughput! It is equal to the shard key attribute of the collection or at least containsĪn alternative to making an UPSERT statement work atomically is to use theĮxclusive option to limit write concurrency for this collection to 1, which Note that in the cluster a unique index can only be created if To prevent this from happening, one should add a unique index to the lookupĪttribute(s). Note that due to this gap between the lookup and insert/update/replace,Įven with a unique index there may be duplicate key errors or conflicts.īut if they occur, the application/client code can execute the same query May all determine that the target document does not exist and then This means if multiple UPSERT queries run concurrently, they The lookup and the insert/update/replace parts are executed one afterĪnother, so that other operations in other threads can happen inīetween. Transactional, especially if it involves different shards and/or DB-Servers. That behavior can be controlled by adjusting the intermediateįor sharded collections, the entire query and/or upsert operation may not be In this case, the query’s operationsĬarried out so far will be committed and not rolled back in case of a laterĪbort/rollback. Query) hits the specified size thresholds. If the RocksDB engine is used and intermediate commits are enabled, a query mayĮxecute intermediate transaction commits in case the running transaction (AQL On a single server, upserts are executed transactionally in an all-or-nothing UPSERT searchExpression INSERT insertExpression REPLACE updateExpression IN collectionīoth variants can optionally end with an OPTIONS Transactionality The syntax for upsert and repsert operations is: UPSERT searchExpression INSERT insertExpression UPDATE updateExpression IN collection Traversal operations, or AQL functions that can read documents. It cannot be followed by read or write operations that access the same collection, by Only a single UPSERT statement per collection is allowed per AQL query, and The UPSERT keyword can be used for checking whether certain documents exist,Īnd to update/replace them in case they exist, or create them in case they do not exist.Įach UPSERT operation is restricted to a single collection, and the
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