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DBMS > Apache Druid vs. EXASOL vs. PostgreSQL

System Properties Comparison Apache Druid vs. EXASOL vs. PostgreSQL

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Editorial information provided by DB-Engines
NameApache Druid  Xexclude from comparisonEXASOL  Xexclude from comparisonPostgreSQL  Xexclude from comparison
DescriptionOpen-source analytics data store designed for sub-second OLAP queries on high dimensionality and high cardinality dataHigh-performance, in-memory, MPP database specifically designed for in-memory analytics.Widely used open source RDBMS infoDeveloped as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL
Primary database modelRelational DBMS
Time Series DBMS
Relational DBMSRelational DBMS infowith object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.
Secondary database modelsDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.59
Rank#111  Overall
#54  Relational DBMS
#7  Time Series DBMS
Score3.65
Rank#89  Overall
#45  Relational DBMS
Score547.57
Rank#4  Overall
#4  Relational DBMS
Websitedruid.apache.orgwww.exasol.comwww.postgresql.org
Technical documentationdruid.apache.org/­docs/­latest/­designwww.exasol.com/­resourceswww.postgresql.org/­docs
DeveloperApache Software Foundation and contributorsExasolPostgreSQL Global Development Group infowww.postgresql.org/­developer
Initial release201220001989 info1989: Postgres, 1996: PostgreSQL
Current release0.20.0, October 202013.1, November 2020
License infoCommercial or Open SourceOpen Source infoApache license v2commercialOpen Source infoBSD
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaC
Server operating systemsLinux
OS X
Unix
FreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows
Data schemeyes infoschema-less columns are supportedyesyes
Typing infopredefined data types such as float or dateyesyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nonoyes infospecific XML-type available, but no XML query functionality.
Secondary indexesyesyesyes
SQL infoSupport of SQLSQL for queryingyesyes infostandard with numerous extensions
APIs and other access methodsJDBC
RESTful HTTP/JSON API
.Net
JDBC
ODBC
WebSocket
ADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Supported programming languagesClojure
JavaScript
PHP
Python
R
Ruby
Scala
Java
Lua
Python
R
.Net
C
C++
Delphi
Java infoJDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl
Server-side scripts infoStored proceduresnouser defined functionsuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.
Triggersnoyesyes
Partitioning methods infoMethods for storing different data on different nodesSharding infomanual/auto, time-basedShardingpartitioning by range, list and (since PostgreSQL 11) by hash
Replication methods infoMethods for redundantly storing data on multiple nodesyes, via HDFS, S3 or other storage enginesSource-replica replication infoother methods possible by using 3rd party extensions
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyes infoHadoop integrationno
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyesno
User concepts infoAccess controlRBAC using LDAP or Druid internals for users and groups for read/write by datasource and systemAccess rights for users, groups and roles according to SQL-standardfine grained access rights according to SQL-standard

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More resources
Apache DruidEXASOLPostgreSQL
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Conferences and events

PostgreSQL Online Trainings
Online Training Courses, 4 May 2020 - 11 December 2020

Recent citations in the news

Study: Big Data Saves Lives, And Patient Safeguards Are Needed
2 December 2020, insideBIGDATA

Apache Druid Adds Ranger Integration
24 August 2020, iProgrammer

Apache Druid Improves Compaction
4 February 2020, iProgrammer

Imply Simplifies Cloud Deployment & Operations for Apache Druid
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Introducing Apache Druid
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Exasol Names Andreas Walter General Manager of North America and Asia Pacific Regions
2 December 2020, Business Wire

Exasol AG trading update for Q3 2020: continued solid Annual Recurring Revenue growth
13 November 2020, Yahoo Eurosport UK

87 Percent of US Retailers Race to Achieve Faster Data-Driven Insights to Support Online Sales
26 November 2020, insideBIGDATA

88% of financial services firms in the UK are under pressure to make decisions faster
23 November 2020, Bdaily

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2 December 2020, TechHQ

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Amazon just open sourced an easier path to PostgreSQL
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MEDIA ALERT: Swarm64 Webinar to Introduce PG Nitrous, New PostgreSQL Cloud, Hosted on AWS and Accelerated by Swarm64 DA
30 November 2020, Business Wire

Developers increasingly pair MongoDB with PostgreSQL, survey finds
23 November 2020, CTOvision

EDB Drives Further Postgres Innovation with Release of EDB 13
17 November 2020, DevOps.com

Postgres Professional and Zabbix to Co-Host Complimentary Virtual PostgreSQL Monitoring Day
30 November 2020, Yahoo Finance

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