polarnero.blogg.se - Arangodb aql functions

#Arangodb aql functions movie#
#Arangodb aql functions driver#

Functions can be called at any query position where an expression is allowed.

#Arangodb aql functions movie#

We will start with one movie at a time to get the names of the actors db. Functions AQL supports functions to allow more complex computations. Suppose, we want to find the names of all the actors who acted in "TheMatrix" OR "TheDevilsAdvocate" − Let us take the first question: All actors who acted in "movie1" OR "movie2". Now we have saved the data, so we will construct the AQL queries to answer the specific questions raised in the beginning of this chapter. Supply the password when prompted as you can see in the above screenshot. $ arangosh -javascript.execute dataset.js I want to calculate the indegree and outdegree of a node in a graph given the vertex and the edge collection. Now execute the following command on the shell − Finally, it could have some sort of 'put it all together'-button which could serialize everything into a JSON object which has the correct structure for the HTTP REST API. Instead of copying and pasting the commands one by one, we will use the -javascript.execute option on Arangosh to execute the multiple commands non-interactively. Ideally the web interface would also allow to define AQL user-defined functions and also bind variables. This file contains the Arangosh commands to create the dataset in the database. You can see in the output above that we have downloaded a JavaScript file dataset.js. The ‘citizen data scientist’ (CDS) concept was invented with good intentionsto promote data, machine learning and AI literacybut it has done more harm than good, the former Forrester analyst writes in a recent blog piece on the Domino Data Lab website. 200 OKĭataset.js 115.14K -.-KB/s in 0.01s Another perspective on the topic comes from Kjell Carllson, who is head of data science strategy and evangelism at Domino Data Lab. Let us start by creating a Test Dataset in Arangosh.

#Arangodb aql functions driver#

All the AQL queries are strings and can simply be copied over to your favorite driver instead of Arangosh.

The number of movies acted in between 20 by actor?ĭuring the process of solving and obtaining the answers to the above queries, we will use Arangosh to create the dataset and run queries on that.

All movies where exactly 6 actors acted in?.

All actors who acted in 3 or more movies?.

All common movies between "actor1" and "actor2”?.

All actors who acted in both "movie1" AND "movie2”?.

All actors who acted in "movie1" OR "movie2"?.

Given a collection of actors and a collection of movies, and an actIn edges collection (with a year property) to connect the vertex as indicated below − In this chapter, we will consider a few AQL Example Queries on an Actors and Movies Database.