DBMS > EJDB vs. Greenplum
System Properties Comparison EJDB vs. Greenplum
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|Editorial information provided by DB-Engines|
|Name||EJDB Xexclude from comparison||Greenplum Xexclude from comparison|
|Description||Embeddable document-store database library with JSON representation of queries (in MongoDB style)||Analytic Database platform built on PostgreSQL. Full name is Pivotal Greenplum Database A logical database in Greenplum is an array of individual PostgreSQL databases working together to present a single database image.|
|Primary database model||Document store||Relational DBMS|
|Secondary database models||Document store|
|Developer||Softmotions||Pivotal Software Inc.|
|Current release||7.0.0, September 2023|
|License Commercial or Open Source||Open Source GPLv2||Open Source Apache 2.0|
|Cloud-based only Only available as a cloud service||no||no|
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|Server operating systems||server-less||Linux|
|Typing predefined data types such as float or date||yes string, integer, double, bool, date, object_id||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 since Version 4.2|
|SQL Support of SQL||no||yes|
|APIs and other access methods||in-process shared library||JDBC|
|Supported programming languages||Actionscript|
|Server-side scripts Stored procedures||no||yes|
|Partitioning methods Methods for storing different data on different nodes||none||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||none||Source-replica replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||yes|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency|
|Foreign keys Referential integrity||no typically not needed, however similar functionality with collection joins possible||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID|
|Concurrency Support for concurrent manipulation of data||yes Read/Write Locking||yes|
|Durability Support for making data persistent||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||no||fine grained access rights according to SQL-standard|
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