I’m a freshman called Cherry from China. I want to ask 6 questions.
- Do JoinArray and crossJoinArray implement with Hash Join or any other join?
- What’s the differences between JoinArray and crossJoinArray according to the usage?
- What’s the differences between Physical Join and Logical Join?
- Does Join Array run all in memory?
- Is there any refenences to JoinArray in SciDB,such as paper and so on?
- How to create a array,such as [(1,3),(2,5),(3,null),(null,null)]?
Thank you very much.