DBMS > EXASOL vs. Heroic vs. PostgreSQL
System Properties Comparison EXASOL vs. Heroic vs. PostgreSQL
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|Editorial information provided by DB-Engines|
|Name||EXASOL Xexclude from comparison||Heroic Xexclude from comparison||PostgreSQL Xexclude from comparison|
|Description||High-performance, in-memory, MPP database specifically designed for in-memory analytics.||Time Series DBMS built at Spotify based on Cassandra or Google Cloud Bigtable, and ElasticSearch||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL|
|Primary database model||Relational DBMS||Time Series 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||Exasol||Spotify||PostgreSQL Global Development Group www.postgresql.org/developer|
|Initial release||2000||2014||1989 1989: Postgres, 1996: PostgreSQL|
|Current release||14.3, May 2022|
|License Commercial or Open Source||commercial||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||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||no||yes specific XML-type available, but no XML query functionality.|
|Secondary indexes||yes||yes via Elasticsearch||yes|
|SQL Support of SQL||yes||no||yes standard with numerous extensions|
|APIs and other access methods||.Net|
|HQL (Heroic Query Language, a JSON-based language)|
native C library
streaming API for large objects
|Supported programming languages||Java|
|Server-side scripts Stored procedures||user defined functions||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding||partitioning by range, list and (since PostgreSQL 11) by hash|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||Source-replica replication other methods possible by using 3rd party extensions|
|MapReduce Offers an API for user-defined Map/Reduce methods||yes Hadoop integration||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Eventual Consistency|
|Foreign keys Referential integrity||yes||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||no||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.||yes||no||no|
|User concepts Access control||Access rights for users, groups and roles according to SQL-standard||fine grained access rights according to SQL-standard|
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