DBMS > Apache Jena - TDB vs. Dgraph vs. PostgreSQL
System Properties Comparison Apache Jena - TDB vs. Dgraph vs. PostgreSQL
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|Name||Apache Jena - TDB Xexclude from comparison||Dgraph Xexclude from comparison||PostgreSQL Xexclude from comparison|
|Description||A RDF storage and query DBMS, shipped as an optional-use component of the Apache Jena framework||Distributed and scalable native Graph DBMS||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL|
|Primary database model||RDF store||Graph DBMS||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.|
|Secondary database models||Document store|
|Developer||Apache Software Foundation originally developed by HP Labs||Dgraph Labs, Inc.||PostgreSQL Global Development Group www.postgresql.org/developer|
|Initial release||2000||2016||1989 1989: Postgres, 1996: PostgreSQL|
|Current release||4.5.0, May 2022||14.4, June 2022|
|License Commercial or Open Source||Open Source Apache License, Version 2.0||Open Source Apache 2.0||Open Source BSD|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||All OS with a Java VM||Linux|
|Data scheme||yes RDF Schemas||schema-free||yes|
|Typing predefined data types such as float or date||yes||yes||yes|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||yes specific XML-type available, but no XML query functionality.|
|SQL Support of SQL||no||no||yes standard with numerous extensions|
|APIs and other access methods||Fuseki REST-style SPARQL HTTP Interface|
Jena RDF API
RIO RDF Input/Output
|GraphQL query language|
gRPC (using protocol buffers) API
native C library
streaming API for large objects
|Supported programming languages||Java||C#|
|Server-side scripts Stored procedures||yes||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Triggers||yes via event handler||no||yes|
|Partitioning methods Methods for storing different data on different nodes||none||yes||partitioning by range, list and (since PostgreSQL 11) by hash|
|Replication methods Methods for redundantly storing data on multiple nodes||none||Synchronous replication via Raft||Source-replica replication other methods possible by using 3rd party extensions|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID TDB Transactions||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no|
|User concepts Access control||Access control via Jena Security||no Planned for future releases||fine grained access rights according to SQL-standard|
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|Apache Jena - TDB||Dgraph||PostgreSQL|
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