ArangoDB 2.4.2
This version is deprecated. Download the new version of ArangoDB
A maintenance release for ArangoDB 2.4.2 is available for download or via your favourite package manager.
v2.4.2 (2015-01-30)
- added custom visitor functionality for AQL traversals
This allows more complex result processing in traversals triggered by AQL. A few examples are shown in this article.
- improved number of results estimated for nodes of type
EnumerateListNodeandSubqueryNodein AQL explain output
Harness the Power of Custom Visitors for AQL Graph Traversals
Jan blogged about some recent extensions for the AQL graph traversal functionality in ArangoDB. These extensions allow invoking user-defined JavaScript code for filtering and results generation in AQL queries that contain traversals.
This should make AQL graph traversals much more powerful than before.
Additionally, AQL graph traversals get more configurable, allowing to write traversal functions with control-flow logic and complex filtering. As a side-effect, this change facilitates writing specialized traversal functions with much higher efficiency than the general-purpose, cover-all-cases default ones.
New Address for GitHub: ArangoDB Updates
We have moved our ArangoDB Github repository from triAGENS to arangodb.
The database:
triAGENS/ArangoDB –> arangodb/arangodb
We’ve also moved:
- arangodb-php –> arangodb/arangodb-php
- elasticsearch-river-arangodb –> arangodb/elasticsearch-river-arangodb
For a certain amount of time the old triAGENS – repositories will redirect to the new ones.
New Foxx Debugging Preview: ArangoDB Updates
We are working hard to improve usability and simplify the usage of Foxx which will be shipped with version 2.5. of ArangoDB.
We have learned from the past and collected a lot of feedback, thanks to all people using Foxx already. It helped us to identify the following three important areas of Foxx that should be improved:
- Debugging of Foxx apps
- Getting started with Foxx
- Development Mode
(more…)
Building a self-learning game with ArangoDB, io.js & AngularJS in half a day.
With the ArangoDB Foxx Microservice Framework we’ve introduced an easy way to create a Web API right on top of the NoSQL database.
In early January Max challenged Andreas (AngularJS / NodeJS) that they could build a full-stack application within half a day.
The web application – in short – is a guessing game, in which the computer tries to guess a thing or animal you think of by asking a series of questions, for which you provide the answers. (more…)
Explaining AQL Queries in a Fancier Way: ArangoDB Tutorial
I have been looking at many AQL queries during the last few weeks…
Looking back, I can say that the JSON query execution plans provided by the explain() method have provided me with a lot of useful information about how the AQL optimizer had transformed a given query. This has helped testing and improving the query optimizer a great deal.
However, the JSON output produced by explain() is so detailed that even for the simplest cases queries it will span multiple screens. This is far too much for quickly assessing what a query will be doing and how it will be executed.
I therefore quickly put together a function that provides a much more compact explain output. Its input parameter is a query string, which it will send to the ArangoDB server to have it explained.
But it doesn’t print a voluminous JSON object. This one is for developers with a full schedule.
ArangoDB 2.4.1 Release: Enhancements & Bug Fixes
This version is deprecated. Download the new version of ArangoDB
A maintenance release for ArangoDB 2.4.1 is available for download or via your favourite package manager.
v2.4.1 (2015-01-19)
- improved WAL recovery output
- fixed certain OR optimizations in AQL optimizer
- better diagnostics for arangoimp
- fixed invalid result of HTTP REST API method
/_admin/foxx/rescan - fixed possible segmentation fault when passing a Buffer object into a V8 function as a parameter
- updated AQB module to 1.8.0.
ArangoDB 2.3.5: Maintenance Release & Bug Fixes
This version is deprecated. Download the new version of ArangoDB
A new maintenance release for the 2.3 branch of ArangoDB is available.
Changes in v2.3.5 (2015-01-16)
- fixed intermittent 404 errors in Foxx apps after mounting or unmounting apps
- fixed issue #1200: Expansion operator results in “Cannot call method ‘forEach’ of null”
- fixed issue #1199: Cannot unlink root node of plan
Note: The latest version is 2.4, released last week.
ArangoDB AQL Optimization: Returning & Modifying in v2.4
ArangoDB provides many options for finding and modifying data. Though there are several more specialized operation, data-modification AQL queries are the most general solution in ArangoDB. They allow to find documents using arbitrary filter criteria, and to modify or remove the documents once found.
Read in Jan’s blog how INSERT, UPDATE, REMOVE and REPLACE operations can now return modified documents and allow to find, modify and return documents from the same AQL query. Read on
ArangoDB 2.4 Release: New Features & Enhancements
This version is deprecated. Download the new version of ArangoDB
We are proud to announce the release of Version 2.4 of our multi-model database ArangoDB. It’s ready for download now and available for all major platforms.
This release is a major step forward. Use Foxx to create your favorite microservice with a few clicks, dockerize it and access it via a REST/Web API from everywhere. – Dr. Frank Celler (CTO)
You can now use EcmaScript 6 features like iterators, symbols, maps and sets by default and enable even more ES6 features with ArangoDB start options. The V8 engine upgrade in ArangoDB 2.4 also improves performance and speeds up V8 garbage collections.
The ArangoDB query language (AQL) gets more efficient group count calculation queries, an optional return value for AQL data-modification queries and improved index handling in filtering AQL queries.
Foxx 2.0: The new Foxx-Generator is a framework that enables developers to build Hypermedia APIs easily. Developers can create Web APIs based on a semantic description of entities and transitions using a statechart alike design approach. Additional to the recently added job queues and authentication services, Foxx got a new web-frontend to easily create new or install Foxx applications from Github or the ArangoDB Store.
Try the new tutorial Foxx in 10 Minutes to build your first Foxx application. Starting with a new Foxx app has never been easier.
Along with ArangoDB the new light-weight JavaScript driver arangojs 3.0 is ready to use.
Download the current 2.4 release and start building your own applications on top of ArangoDB!