DBMS > Alibaba Cloud AnalyticDB for PostgreSQL vs. EJDB vs. openGemini vs. SAP Advantage Database Server vs. XTDB

System Properties Comparison Alibaba Cloud AnalyticDB for PostgreSQL vs. EJDB vs. openGemini vs. SAP Advantage Database Server vs. XTDB

Editorial information provided by DB-Engines
Name	Alibaba Cloud AnalyticDB for PostgreSQL former name was HybridDB  Xexclude from comparison	EJDB  Xexclude from comparison	openGemini  Xexclude from comparison	SAP Advantage Database Server former name: Sybase ADS  Xexclude from comparison	XTDB formerly named Crux  Xexclude from comparison
				SAP Advantage Database Server seems to be discontinued. Therefore it is excluded from the DB-Engines Ranking.
Description	An online MPP (Massively Parallel Processing) data warehousing service based on Greenplum	Embeddable document-store database library with JSON representation of queries (in MongoDB style)	An open source distributed Time Series DBMS with high concurrency, high performance, and high scalability	Low-cost RDBMS with access to ISAM and FoxPro data structures	A general purpose database with bitemporal SQL and Datalog and graph queries
Primary database model	Relational DBMS	Document store	Time Series DBMS	Relational DBMS	Document store
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.76 Rank #220   Overall #102   Relational DBMS	Score 0.31 Rank #296   Overall #44   Document stores	Score 0.09 Rank #361   Overall #37   Time Series DBMS		Score 0.18 Rank #332   Overall #46   Document stores
Website	www.alibabacloud.com/­product/­hybriddb-postgresql	github.com/­Softmotions/­ejdb	www.opengemini.org github.com/­openGemini	www.sap.com/products/advantage-database-server.html	github.com/­xtdb/­xtdb www.xtdb.com
Technical documentation	www.alibabacloud.com/­help/­en/­analyticdb-for-postgresql/­latest/­product-introduction-overview	github.com/­Softmotions/­ejdb/­blob/­master/­README.md	docs.opengemini.org/­guide		www.xtdb.com/­docs
Developer	Alibaba / Pivotal Software Inc. / PostgreSQL Global Development Group	Softmotions	Huawei and openGemini community	Sybase, SAP	Juxt Ltd.
Initial release	2016	2012	2022	1993	2019
Current release			1.1, July 2023		1.19, September 2021
License Commercial or Open Source	commercial	Open Source GPLv2	Open Source Apache Version 2.0	commercial	Open Source MIT License
Cloud-based only Only available as a cloud service	yes	no	no	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language		C	Go		Clojure
Server operating systems	hosted	server-less	Linux Windows	Linux Windows	All OS with a Java 8 (and higher) VM Linux
Data scheme	yes	schema-free	schema-free	yes	schema-free
Typing predefined data types such as float or date	yes	yes string, integer, double, bool, date, object_id	Integer, Float, Boolean, String	yes	yes, extensible-data-notation format
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		no	no	no
Secondary indexes	yes	no	yes	yes	yes
SQL Support of SQL	yes	no	SQL-like query language	yes	limited SQL, making use of Apache Calcite
APIs and other access methods	JDBC ODBC	in-process shared library	HTTP REST	.NET Client API ADO.NET JDBC ODBC OLE DB	HTTP REST JDBC
Supported programming languages	C Java Perl Python R	Actionscript C C# C++ Go Java JavaScript (Node.js) Lua Objective-C Pike Python Ruby	C C++ Go Java JavaScript (Node.js) Python Rust	Delphi Perl PHP	Clojure Java
Server-side scripts Stored procedures	yes	no	no	yes	no
Triggers	yes	no	no	yes	no
Partitioning methods Methods for storing different data on different nodes	Sharding Implicit feature of the cloud service	none	Sharding	none	none
Replication methods Methods for redundantly storing data on multiple nodes	yes Implicit feature of the cloud service	none	yes	Multi-source replication CONFLICT Trigger to resolve replication conflicts Source-replica replication	yes, each node contains all data
MapReduce Offers an API for user-defined Map/Reduce methods	no	no	no	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency			Immediate Consistency
Foreign keys Referential integrity	yes	no typically not needed, however similar functionality with collection joins possible	no	yes	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	ACID	no	no	ACID	ACID
Concurrency Support for concurrent manipulation of data	yes	yes Read/Write Locking	yes	yes	yes
Durability Support for making data persistent	yes	yes	yes	yes	yes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no		yes	no caching of (temporary) tables can be configured
User concepts Access control	fine grained access rights according to SQL-standard	no	Administrators and common users accounts	fine grained access rights according to SQL-standard
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More resources
	Alibaba Cloud AnalyticDB for PostgreSQL former name was HybridDB	EJDB	openGemini	SAP Advantage Database Server former name: Sybase ADS	XTDB formerly named Crux
Recent citations in the news	Alibaba Cloud upgrades AnalyticDB with vector database engine 25 July 2023, CloudTech News Two Critical Flaws Found in Alibaba Cloud's PostgreSQL Databases 20 April 2023, The Hacker News Accidental ‘write’ Permissions In Alibaba PostgreSQL Let Attackers Access Sensitive Data 22 April 2023, GBHackers Two critical vulnerabilities spotted in Alibaba Cloud's PostgreSQL databases 21 April 2023, TEISS Alibaba Cloud ignites AI innovation in Singapore with recent hackathon | KrASIA 27 March 2024, KrASIA provided by Google News		About HUAWEI Open Source 9 February 2022, Huawei provided by Google News	SAP Announces Q3 2023 Results: Asia Pacific and Japan View 19 October 2023, SAP News provided by Google News

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