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DBMS > HyperSQL vs. OpenMLDB vs. OrientDB vs. Realm

System Properties Comparison HyperSQL vs. OpenMLDB vs. OrientDB vs. Realm

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Editorial information provided by DB-Engines
NameHyperSQL infoalso known as HSQLDB  Xexclude from comparisonOpenMLDB  Xexclude from comparisonOrientDB  Xexclude from comparisonRealm  Xexclude from comparison
DescriptionMultithreaded, transactional RDBMS written in Java infoalso known as HSQLDBAn open-source machine learning database that provides a feature platform for training and inferenceMulti-model DBMS (Document, Graph, Key/Value)A DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core Data
Primary database modelRelational DBMSTime Series DBMSDocument store
Graph DBMS
Key-value store
Document store
Secondary database modelsRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score3.49
Rank#87  Overall
#47  Relational DBMS
Score0.02
Rank#367  Overall
#37  Time Series DBMS
Score3.19
Rank#93  Overall
#16  Document stores
#7  Graph DBMS
#14  Key-value stores
Score7.60
Rank#52  Overall
#9  Document stores
Websitehsqldb.orgopenmldb.aiorientdb.orgrealm.io
Technical documentationhsqldb.org/­web/­hsqlDocsFrame.htmlopenmldb.ai/­docs/­zh/­mainwww.orientdb.com/­docs/­last/­index.htmlrealm.io/­docs
Developer4 Paradigm Inc.OrientDB LTD; CallidusCloud; SAPRealm, acquired by MongoDB in May 2019
Initial release2001202020102014
Current release2.7.2, June 20232024-2 February 20243.2.29, March 2024
License infoCommercial or Open SourceOpen Source infobased on BSD licenseOpen SourceOpen Source infoApache version 2Open Source
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaC++, Java, ScalaJava
Server operating systemsAll OS with a Java VM infoEmbedded (into Java applications) and Client-Server operating modesLinuxAll OS with a Java JDK (>= JDK 6)Android
Backend: server-less
iOS
Windows
Data schemeyesFixed schemaschema-free infoSchema can be enforced for whole record ("schema-full") or for some fields only ("schema-hybrid")yes
Typing infopredefined data types such as float or dateyesyesyesyes
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.nononono
Secondary indexesyesyesyesyes
SQL infoSupport of SQLyesyesSQL-like query language, no joinsno
APIs and other access methodsHTTP API infoJDBC via HTTP
JDBC
ODBC
JDBC
SQLAlchemy
Tinkerpop technology stack with Blueprints, Gremlin, Pipes
Java API
RESTful HTTP/JSON API
Supported programming languagesAll languages supporting JDBC/ODBC
Java
C++
Go
Java
Python
Scala
.Net
C
C#
C++
Clojure
Java
JavaScript
JavaScript (Node.js)
PHP
Python
Ruby
Scala
.Net
Java infowith Android only
Objective-C
React Native
Swift
Server-side scripts infoStored proceduresJava, SQLnoJava, Javascriptno inforuns within the applications so server-side scripts are unnecessary
TriggersyesnoHooksyes infoChange Listeners
Partitioning methods infoMethods for storing different data on different nodesnonehorizontal partitioningShardingnone
Replication methods infoMethods for redundantly storing data on multiple nodesnoneSource-replica replicationMulti-source replicationnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono infocould be achieved with distributed queriesno
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesnoyes inforelationship in graphsno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDnoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyes infoIn-Memory realm
User concepts infoAccess controlfine grained access rights according to SQL-standardfine grained access rights according to SQL-standardAccess rights for users and roles; record level security configurableyes

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More resources
HyperSQL infoalso known as HSQLDBOpenMLDBOrientDBRealm
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