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DBMS > JSqlDb vs. OpenMLDB vs. PostGIS vs. QuestDB

System Properties Comparison JSqlDb vs. OpenMLDB vs. PostGIS vs. QuestDB

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Editorial information provided by DB-Engines
NameJSqlDb  Xexclude from comparisonOpenMLDB  Xexclude from comparisonPostGIS  Xexclude from comparisonQuestDB  Xexclude from comparison
JSqlDB seems to be discontinued. Therefore it is excluded from the DB-Engines ranking.
DescriptionJavaScript Query Language Database, stores JavaScript objects and primitivesAn open-source machine learning database that provides a feature platform for training and inferenceSpatial extension of PostgreSQLA high performance open source SQL database for time series data
Primary database modelDocument store
Object oriented DBMS
Time Series DBMSSpatial DBMSTime Series DBMS
Secondary database modelsRelational DBMSRelational DBMSRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.11
Rank#339  Overall
#30  Time Series DBMS
Score20.16
Rank#29  Overall
#1  Spatial DBMS
Score2.81
Rank#98  Overall
#7  Time Series DBMS
Websitejsqldb.org (offline)openmldb.aipostgis.netquestdb.io
Technical documentationopenmldb.ai/­docs/­zh/­mainpostgis.net/­documentationquestdb.io/­docs
DeveloperKonrad von Backstrom4 Paradigm Inc.QuestDB Technology Inc
Initial release2018202020052014
Current release0.8, December 20182024-2 February 20243.4.2, February 2024
License infoCommercial or Open SourceOpen SourceOpen SourceOpen Source infoGPL v2.0Open Source infoApache 2.0
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC++, Java, ScalaCJava (Zero-GC), C++, Rust
Server operating systemsLinux
macOS
Windows
LinuxLinux
macOS
Windows
Data schemeschema-freeFixed schemayesyes infoschema-free via InfluxDB Line Protocol
Typing infopredefined data types such as float or datenoyesyesyes
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.nonoyesno
Secondary indexesnoyesyesno
SQL infoSupport of SQLnoyesyesSQL with time-series extensions
APIs and other access methodsJDBC
SQLAlchemy
HTTP REST
InfluxDB Line Protocol (TCP/UDP)
JDBC
PostgreSQL wire protocol
Supported programming languagesJavaScriptC++
Go
Java
Python
Scala
C infoPostgreSQL driver
C++
Go
Java
JavaScript (Node.js)
Python
Rust infoover HTTP
Server-side scripts infoStored proceduresfunctions in JavaScriptnouser defined functionsno
Triggersnonoyesno
Partitioning methods infoMethods for storing different data on different nodesnonehorizontal partitioningyes infobased on PostgreSQLhorizontal partitioning (by timestamps)
Replication methods infoMethods for redundantly storing data on multiple nodesnoneSource-replica replicationyes infobased on PostgreSQLSource-replica replication with eventual consistency
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACID for single-table writes
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyes infousing RocksDByesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesnoyes infothrough memory mapped files
User concepts infoAccess controlfine grained access rights according to SQL-standardyes infobased on PostgreSQL
More information provided by the system vendor
JSqlDbOpenMLDBPostGISQuestDB
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