DBMS > Amazon DocumentDB vs. PostgreSQL vs. searchxml
System Properties Comparison Amazon DocumentDB vs. PostgreSQL vs. searchxml
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|Editorial information provided by DB-Engines|
|Name||Amazon DocumentDB Xexclude from comparison||PostgreSQL Xexclude from comparison||searchxml Xexclude from comparison|
|Description||Fast, scalable, highly available, and fully managed MongoDB-compatible database service||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||DBMS for structured and unstructured content wrapped with an application server|
|Primary database model||Document store||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Native XML DBMS|
|Secondary database models||Document store|
|Developer||PostgreSQL Global Development Group www.postgresql.org/developer||informationpartners gmbh|
|Initial release||2019||1989 1989: Postgres, 1996: PostgreSQL||2015|
|Current release||12.2, February 2020||1.0|
|License Commercial or Open Source||commercial||Open Source BSD||commercial|
|Cloud-based only Only available as a cloud service||yes||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||hosted||FreeBSD|
|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.||yes|
|SQL Support of SQL||no||yes standard with numerous extensions||no|
|APIs and other access methods||proprietary protocol using JSON (MongoDB compatible)||ADO.NET|
native C library
streaming API for large objects
|RESTful HTTP API|
|Supported programming languages||Go|
|C++ most other programming languages supported via APIs|
|Server-side scripts Stored procedures||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||yes on the application server|
|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||Multi-availability zones for high availability, asynchronous replication for up to 15 read replicas||Master-slave replication other methods possible by using 3rd party extensions||yes sychronisation to multiple collections|
|MapReduce Offers an API for user-defined Map/Reduce methods||no may be implemented via Amazon Elastic MapReduce (Amazon EMR)||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no typically not used, however similar functionality with DBRef possible||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||Atomic single-document operations||ACID||multiple readers, single writer|
|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||no|
|User concepts Access control||Access rights for users and roles||fine grained access rights according to SQL-standard||Domain, group and role-based access control at the document level and for application services|
More information provided by the system vendor
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|DB-Engines blog posts|
PostgreSQL is the DBMS of the Year 2018
|Conferences and events|
PGCon 2020, PostgreSQL Conference for Users and Developers
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