Hello,
You should use REST API.
https://docs.arangodb.com/3.3/HTTP/AqlQueryCursor/QueryResults.html
To fetch a big index from ArangoDb you need to use the cursors and make a loop in the script to fetch all data. The blocking point here is that arangoDb use PUT method to scroll over data and in Qlik sense only POST and GET methods are allowed.
So, if you need to use a ArangoDb cursors you should develop your own custom connector to allow PUT method.
https://help.qlik.com/en-US/sense-developer/September2018/Subsystems/QVXSDKAPI/Content/Sense_QVXSDKA...
For information : I already did this and I was able to retrieve any data from arangoDb easily with our custom connector.
