--- title: First Beta of ArangoDB 2.3 is out - ArangoDB description: This version is deprecated. Download the new version of ArangoDB We are proud to present ArangoDB 2.3. The first beta version is now available for download from our web-site or you can use “brew install –unstable arangodb” under Mac OS X. You can also look into the nightly documentation for more information. Please note that… --- ArangoDB 3.12 Product Release Announcement! Read the blog for details. [Read Blog](https://arangodb.com/2024/03/arangodb-3-12-performance-for-all-your-data-models/) [![logo](https://blog.arangodb.com/hs-fs/hubfs/Imported_Blog_Media/logo.png?width=301&height=50&name=logo.png "logo")](https://arango.ai) ### Why Graph [The Rise of Graph](https://arangodb.com/the-rise-of-graph/) [The Graph ML Gamechanger](https://arangodb.com/the-graph-ml-gamechanger/) [Consolidate to Graph](https://arangodb.com/graph-vs-relational/) [Graph DB Basics](https://arangodb.com/graph-database/) ### Products [Managed Graph DB](https://arangodb.com/arangograph-managedgraphdb/) [Self-Managed Graph DB](https://arangodb.com/arangograph-selfmanaged/) [Managed Graph ML](https://arangodb.com/managed-ml-graph/) [Community Edition](https://arangodb.com/community-server/) [Compare Products](https://arangodb.com/subscriptions/) ### Solutions Use Cases Industries Solution Accelerators - [Cyber/Threat Mgmt](https://arangodb.com/solutions/use-cases/cyber-threat-management/) - [Fraud Detection](https://arangodb.com/solutions/use-cases/fraud-detections/) - 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[Recommendations](https://arangodb.com/solutions/use-cases/recommendations/) - [Case Management](https://arangodb.com/solutions/use-cases/case-management/) - [Geospatial Analysis](https://arangodb.com/solutions/use-cases/geospatial/) - [Master Data Mgmt](https://arangodb.com/solutions/use-cases/master-data-management/) - Industries - [Software & Technology](https://arangodb.com/arangodb-for-software-tech/) - [Financial Services](https://arangodb.com/arangodb-for-financial-services/) - [Tele Communication](https://arangodb.com/telecommunications-and-network/) - [E-commerce](https://arangodb.com/arangodb-for-e-commerce/) - [Healthcare](https://arangodb.com/arangodb-for-healthcare/) - [Government](https://arangodb.com/arangodb-for-government/) - [Aerospace & Defence](https://arangodb.com/arangodb-for-aerospace-defense/) - [Manufacturing](https://arangodb.com/arangodb-for-manufacturing/) - Solution Accelerators - [Enterprise Knowledge Graphs](https://arangodb.com/resources/white-papers/enterprise-knowledge-graphs/) - 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Learn - [Documentation](https://docs.arangodb.com/stable/) - [Developer Hub](https://developer.arangodb.com/) - [ArangoDB University](https://university.arangodb.com/) - [Blog](https://arangodb.com/blog/) - [Certification](https://arangodb.com/learn/certification/) - [Community](https://arangodb.com/community/) - [Events](https://arangodb.com/events/) - [Resources](https://arangodb.com/resources/) - [Training Center](https://arangodb.com/learn/) - Company - [About Us](https://arangodb.com/about-us/) - [Team](https://arangodb.com/about-arangodb/) - [Partners](https://arangodb.com/partners/) - [News](https://arangodb.com/news/) - [Careers](https://arangodb.applytojob.com/apply) - [Pricing](https://arangodb.com/download-major/pricing/) [**Start Free** ArangoGraph Cloud](https://dashboard.arangodb.cloud/signup?acceptedTermsAndConditions=1) [**Download Now** ArangoDB Enterprise](https://arangodb.com/download-arangodb-enterprise/) ![Vector-5](https://blog.arangodb.com/hubfs/Imported_Blog_Media/search.svg) # First Beta of ArangoDB 2.3 is out November 03, 2014 Tags: [Query Language](https://blog.arangodb.com/blog/topic/query-language), [Releases](https://blog.arangodb.com/blog/topic/releases), [General](https://blog.arangodb.com/blog/topic/general), [Release](https://blog.arangodb.com/blog/topic/release) [Twitter](https://twitter.com/intent/tweet?url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3) [LinkedIn](http://www.linkedin.com/shareArticle?mini=true&url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3) [Reddit](https://www.reddit.com/share?url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3) [Yahoo](https://plus.google.com/share?url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3%3Futm_medium%3Dsocial%26utm_source%3Dgoogle_plus) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 7 minutes *This version is deprecated. [Download the new version](https://www.arangodb.com/download) of ArangoDB* We are proud to present ArangoDB 2.3. The first beta version is now available for download from our web-site or you can use “brew install –unstable arangodb” under Mac OS X. You can also look into the [nightly documentation](https://www.arangodb.com/docs/devel/) for more information. Please note that the main feature of this release contains a complete rewrite of the query engine, allowing much more optimizations than before – especially in the cluster case. It would be very helpful for us, if you could test this query engine as much as possible. If you find any unexpected behavior, please let us know. The data-files can be upgraded from 2.x to 2.3. You should, however, backup the database directory beforehand, as this is a beta-release. ### Features and improvements The following list shows in detail which features have been added or improved in ArangoDB 2.3. ArangoDB 2.3 also contains several bug-fixes that are not listed here. ### AQL improvements **Framework improvements** AQL queries are now sent through a query optimizer framework before execution. The query optimizer framework will first convert the internal representation of the query, the abstract syntax tree, into an initial execution plan. The execution plan is then send through optimizer rules that may directly modify the plan in place or create a new variant of the plan. New plans might again be optimized, allowing the optimizer to carry out several optimizations. After creating plans, the optimizer will estimate the costs for each plan and pick the plan with the lowest cost (termed the *optimal plan*) for the actual query execution. With the `explain()` method of `ArangoStatement` users can check which execution plan the optimizer picks, or retrieve a list of other plans that optimizer did not choose. The plan will reveal many details about which indexes are used etc. `explain()` will also return the of optimizer rules applied so users can validate whether or not a query allows using a specific optimization. Execution of AQL queries has been rewritten in C++, allowing many queries to avoid the conversion of documents between ArangoDB’s internal low-level data structure and the V8 object representation format. The framework for optimizer rules is now also generally cluster-aware, allowing specific optimizations for queries that run in a cluster. Additionally, the optimizer was designed to be extensible in order to add more optimizations in the future. **Language improvements** **Alternative operator syntax** ArangoDB 2.3 allows you to write the following alternative forms for the logical operators: - `AND`: logical and - `OR`: logical or - `NOT`: negation This new syntax is just an alternative to the old syntax, allowing easier migration from SQL. The old syntax is still fully supported and will be: - `&&`: logical and - `||`: logical or - `!`: negation **NOT IN operator** AQL now has a dedicated `NOT IN` operator. Previously, a `NOT IN` was only achievable by writing a negated `IN` condition: ``` FOR i IN ... FILTER ! (i IN [ 23, 42 ]) ... ``` In ArangoDB 2.3, the same result can now alternatively be achieved by writing the more intuitive variant: ``` FOR i IN ... FILTER i NOT IN [ 23, 42 ] ... ``` **AQL queries throw less exceptions** In previous versions of ArangoDB, AQL queries aborted with an exception in many situations and threw a runtime exception. For example, exceptions were thrown when trying to find a value using the `IN` operator in a non-list element, when trying to use non-boolean values with the logical operands `&&` or `||` or `!`, when using non-numeric values in arithmetic operations or when passing wrong parameters into functions etc. The fact that many AQL operators could throw exceptions led to a lot of questions from users, and a lot of more-verbose-than-necessary queries. For example, the following query failed when there were documents that did not have a `topics` attribute at all: ``` FOR doc IN mycollection FILTER doc.topics IN [ "something", "whatever" ] RETURN doc ``` This forced users to rewrite the query as follows: ``` FOR doc IN mycollection FILTER IS_LIST(doc.topics) && doc.topics IN [ "something", "whatever" ] RETURN doc ``` In ArangoDB 2.3 this has been changed to make AQL easier to use. The change provides an extra benefit, and that is that non-throwing operators allow the query optimizer to perform much more transformations in the query without changing its overall result. Here is a summary of changes: - when a non-list value is used on the right-hand side of the `IN` operator, the result will be `false` in ArangoDB 2.3, and no exception will be thrown. - the boolean operators `&&` and `||` do not throw in ArangoDB 2.3 if any of the operands is not a boolean value. Instead, they will perform an implicit cast of the values to booleans. Their result will be as follows: - `lhs && rhs` will return `lhs` if it is `false` or would be `false` when converted into a boolean. If `lhs` is `true` or would be `true` when converted to a boolean, `rhs` will be returned. - `lhs || rhs` will return `lhs` if it is `true` or would be `true` when converted into a boolean. If `lhs` is `false` or would be `false` when converted to a boolean, `rhs` will be returned. - `! value` will return the negated value of `value` converted into a boolean - the arithmetic operators (`+`, `-`, `*`, `/`, `%`) can be applied to any value and will not throw exceptions when applied to non-numeric values. Instead, any value used in these operators will be casted to a numeric value implicitly. If no numeric result can be produced by an arithmetic operator, it will return `null` in ArangoDB 2.3. This is also true for division by zero. - passing arguments of invalid types into AQL functions does not throw a runtime exception in most cases, but may produce runtime warnings. Built-in AQL functions that receive invalid arguments will then return `null`. **Performance improvements** **Non-unique hash indexes** The performance of insertion into *non-unique* hash indexes has been improved significantly. This fixes performance problems in case attributes were indexes that contained only very few distinct values, or when most of the documents did not even contain the indexed attribute. This also fixes problems when loading collections with such indexes. The insertion time now scales linearly with the number of documents regardless of the cardinality of the indexed attribute. **Reverse iteration over skiplist indexes** AQL queries can now use a sorted skiplist index for reverse iteration. This allows several queries to run faster than in previous versions of ArangoDB. For example, the following AQL query can now use the index on `doc.value`: ``` FOR doc IN mycollection FILTER doc.value > 23 SORT doc.values DESC RETURN doc ``` Previous versions of ArangoDB did not use the index because of the descending (`DESC`) sort. Additionally, the new AQL optimizer can use an index for sorting now even if the AQL query does not contain a `FILTER` statement. This optimization was not available in previous versions of ArangoDB. ### Added basic support for handling binary data in Foxx Buffer objects can now be used when setting the response body of any Foxx action. This allows Foxx actions to return binary data. Requests with binary payload can be processed in Foxx applications by using the new method `res.rawBodyBuffer()`. This will return the unparsed request body as a Buffer object. Additionally, the `res.send()` method has been added as a convenience method for returning strings, JSON objects or Buffers from a Foxx action. It provides some auto-detection based on its parameter value: ``` res.send(" some HTML "); // returns an HTML string res.send({ success: true }); // returns a JSON object res.send(new Buffer("some binary data")); // returns binary data ``` The convenience method `res.sendFile()` can now be used to return the contents of a file from a Foxx action. They file may contain binary data: ``` res.sendFile(applicationContext.foxxFilename("image.png")); ``` The filesystem methods `fs.write()` and `fs.readBuffer()` can be used to work with binary data, too: `fs.write()` will perform an auto-detection of its second parameter’s value so it works with Buffer objects: ``` fs.write(filename, "some data"); // saves a string value in file fs.write(filename, new Buffer("some binary data")); // saves (binary) contents of a buffer ``` `fs.readBuffer()` has been added as a method to read the contents of an arbitrary file into a Buffer object. ### Web interface Batch document removal and move functionality has been added to the web interface, making it easier to work with multiple documents at once. Additionally, basic JSON import and export tools have been added. ### Command-line options added The command-line option `--javascript.v8-contexts` was added to arangod to provide better control over the number of V8 contexts created in arangod. Previously, the number of V8 contexts arangod created at startup was equal to the number of server threads (as specified by option `--server.threads`). In some situations it may be more sensible to create different amounts of threads and V8 contexts. This is because each V8 contexts created will consume memory and each one requires CPU resources for periodic garbage collection. Contrary, server threads do not have such high memory or CPU footprint. If the option `--javascript.v8-contexts` is not specified, the number of V8 contexts created at startup will remain equal to the number of server threads. Thus no change in configuration is required to keep the same behavior as in previous ArangoDB versions. The command-line option `--log.use-local-time` was added to print dates and times in ArangoDB’s log in the server-local timezone instead of UTC. If it is not set, the timezone will default to UTC. The option `--backslash-escape` has been added to arangoimp. Specifying this option will use the backslash as the escape character for literal quotes when parsing CSV files. The escape character for literal quotes is still the double quote character. ### Miscellaneous improvements ArangoDB’s built-in HTTP server now supports HTTP pipelining. The ArangoShell tutorial from the arangodb.com website is now integrated into the ArangoDB shell. [Twitter](https://twitter.com/intent/tweet?url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3) [LinkedIn](http://www.linkedin.com/shareArticle?mini=true&url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3) [Reddit](https://www.reddit.com/share?url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3) [Yahoo](https://plus.google.com/share?url=https://blog.arangodb.com/blog/2014/11/first-beta-arangodb-2-3%3Futm_medium%3Dsocial%26utm_source%3Dgoogle_plus) ![Picture of Frank Celler](https://blog.arangodb.com/hubfs/Imported_Blog_Media/Authors/Author-avatar.png) November 03, 2014 , [Frank Celler](https://blog.arangodb.com/blog/author/frank-celler) Frank is both entrepreneur and backend developer, developing mostly memory databases for two decades. He is the CTO and co-founder of ArangoDB. Try to challenge Frank asking him questions on C, C++ and MRuby. Besides Frank organizes Cologne’s NoSQL group & is an active member of NoSQL community. ### Leave a Comment Tags - [General](https://blog.arangodb.com/blog/topic/general) - [Release](https://blog.arangodb.com/blog/topic/release) - [Community](https://blog.arangodb.com/blog/topic/community) - [Releases](https://blog.arangodb.com/blog/topic/releases) - [Performance](https://blog.arangodb.com/blog/topic/performance) - [Tutorial](https://blog.arangodb.com/blog/topic/tutorial) - [Foxx](https://blog.arangodb.com/blog/topic/foxx) - [AQL](https://blog.arangodb.com/blog/topic/aql) - [API](https://blog.arangodb.com/blog/topic/api) - [Newsletter](https://blog.arangodb.com/blog/topic/newsletter) - [Cluster](https://blog.arangodb.com/blog/topic/cluster) - [Graph](https://blog.arangodb.com/blog/topic/graph) - [Graphs](https://blog.arangodb.com/blog/topic/graphs) - [Documentation](https://blog.arangodb.com/blog/topic/documentation) - [Javascript](https://blog.arangodb.com/blog/topic/javascript) - [Query Language](https://blog.arangodb.com/blog/topic/query-language) - 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