DBMS > 4D vs. PostgreSQL vs. RDF4J
System Properties Comparison 4D vs. PostgreSQL vs. RDF4J
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|Editorial information provided by DB-Engines|
|Name||4D former name: 4th Dimension Xexclude from comparison||PostgreSQL Xexclude from comparison||RDF4J formerly known as Sesame Xexclude from comparison|
|Description||Application development environment with integrated database management system||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||RDF4J is a Java framework for processing RDF data, supporting both memory-based and a disk-based storage.|
|Primary database model||Relational DBMS||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||RDF store|
|Secondary database models||Document store|
|Developer||4D, Inc||PostgreSQL Global Development Group www.postgresql.org/developer||Since 2016 officially forked into an Eclipse project, former developer was Aduna Software.|
|Initial release||1984||1989 1989: Postgres, 1996: PostgreSQL||2004|
|Current release||v17.0, July 2018||12.2, February 2020|
|License Commercial or Open Source||commercial||Open Source BSD||Open Source Eclipse Distribution License (EDL), v1.0.|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||OS X|
|Data scheme||yes||yes||yes RDF Schemas|
|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.||yes||yes specific XML-type available, but no XML query functionality.|
|SQL Support of SQL||yes close to SQL 92||yes standard with numerous extensions||no|
|APIs and other access methods||ODBC|
RESTful HTTP API by using 4D Mobile
native C library
streaming API for large objects
RIO RDF Input/Output
SeRQL Sesame RDF Query Language
Sesame REST HTTP Protocol
|Supported programming languages||4D proprietary IDE|
|Server-side scripts Stored procedures||yes||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||yes|
|Partitioning methods Methods for storing different data on different nodes||none||partitioning by range, list and (since PostgreSQL 11) by hash||none|
|Replication methods Methods for redundantly storing data on multiple nodes||Master-master replication||Master-slave replication other methods possible by using 3rd party extensions||none|
|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||yes||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||ACID Isolation support depends on the API used|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes in-memory storage is supported as well|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||no|
|User concepts Access control||Users and groups||fine grained access rights according to SQL-standard||no|
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|4D former name: 4th Dimension||PostgreSQL||RDF4J formerly known as Sesame|
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