DBMS > Adabas vs. PostgreSQL vs. RethinkDB
System Properties Comparison Adabas vs. PostgreSQL vs. RethinkDB
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|Editorial information provided by DB-Engines|
|Name||Adabas denotes "adaptable data base" Xexclude from comparison||PostgreSQL Xexclude from comparison||RethinkDB Xexclude from comparison|
|Description||OLTP - DBMS for mainframes and Linux/Unix/Windows environments used typically together with the Natural programming platform||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||DBMS for the Web with a mechanism to push updated query results to applications in realtime.|
|Primary database model||Multivalue DBMS||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Document store|
|Secondary database models||Document store|
|Developer||Software AG||PostgreSQL Global Development Group www.postgresql.org/developer||The Linux Foundation since July 2017|
|Initial release||1971||1989 1989: Postgres, 1996: PostgreSQL||2009|
|Current release||14.4, June 2022||2.4.1, August 2020|
|License Commercial or Open Source||commercial||Open Source BSD||Open Source Apache Version 2|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||BS2000|
|Typing predefined data types such as float or date||yes||yes||yes string, binary, float, bool, date, geometry|
|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.||no|
|SQL Support of SQL||yes with add-on product Adabas SQL Gateway||yes standard with numerous extensions||no|
|APIs and other access methods||HTTP API with add-on software Adabas SOA Gateway|
SOAP-based API with add-on software Adabas SOA Gateway
native C library
streaming API for large objects
|Supported programming languages||Natural||.Net|
|C community-supported driver|
C# community-supported driver
C++ community-supported driver
Clojure community-supported driver
Dart community-supported driver
Erlang community-supported driver
Go community-supported driver
Haskell community-supported driver
Java official driver
Lisp community-supported driver
Lua community-supported driver
Objective-C community-supported driver
Perl community-supported driver
PHP community-supported driver
Python official driver
Ruby official driver
Scala community-supported driver
|Server-side scripts Stored procedures||in Natural||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Triggers||no||yes||Client-side triggers through changefeeds|
|Partitioning methods Methods for storing different data on different nodes||yes, with additonal products like Adabas Cluster Services, Adabas Parallel Services, Adabas Vista||partitioning by range, list and (since PostgreSQL 11) by hash||Sharding range based|
|Replication methods Methods for redundantly storing data on multiple nodes||yes, with add-on product Event Replicator||Source-replica replication other methods possible by using 3rd party extensions||Source-replica replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||yes|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||Atomic single-document operations|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes MVCC based|
|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||no||no|
|User concepts Access control||only with OS-specific tools (e.g. IBM RACF, CA Top Secret)||fine grained access rights according to SQL-standard||yes users and table-level permissions|
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|Adabas denotes "adaptable data base"||PostgreSQL||RethinkDB|
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