Databases with Not Supported Concurrency Control


4D	1984	Relational	Not Supported
ActorDB Abandoned	2014	Relational	Not Supported, Multi-version Concurrency Control (MVCC)	Abandoned
Aerospike NoSQL AI-Assisted	2009	Document / XML, Key/Value, Vector	Not Supported	NoSQL AI-Assisted
AlaSQL AI-Assisted	2014	Document / XML, Relational	Not Supported	AI-Assisted
AllegroGraph	2004	Triplestore / RDF	Not Supported
BlazingSQL OLAP Abandoned Failed Company	2015	Relational	Not Supported	OLAP Abandoned Failed Company
BlinkDB Abandoned	2012	Relational	Not Supported	Abandoned
BoJack Abandoned	2016	Key/Value	Not Supported	Abandoned
chDB OLAP Acquired Company AI-Assisted	2023	Relational	Not Supported	OLAP Acquired Company AI-Assisted
ClickHouse OLAP AI-Assisted	2016	Relational	Not Supported	OLAP AI-Assisted
Cloud BigTable	2005	Column Family / Wide-Column	Not Supported
CloverDB NoSQL AI-Assisted	2022	Document / XML	Not Supported	NoSQL AI-Assisted
Hadapt OLAP Acquired Company Middleware	2009	Relational	Not Supported	OLAP Acquired Company Middleware
HStreamDB Streaming	2020	Relational	Not Supported	Streaming
Impala OLAP AI-Assisted	2013	Relational	Not Supported	OLAP AI-Assisted
IoTDB Time-Series AI-Assisted	2017	Hierarchical	Not Supported	Time-Series AI-Assisted
JanusGraph Acquired Company	2012	Graph	Not Supported	Acquired Company
Kyoto Cabinet	2009	Key/Value	Not Supported
LedisDB Abandoned NoSQL	2014	Key/Value	Not Supported	Abandoned NoSQL
LinDB	2019	Column Family / Wide-Column	Not Supported
LonaDB NoSQL	2023	Document / XML	Not Supported	NoSQL
MammothDB OLAP Acquired Company	2012	Relational	Not Supported	OLAP Acquired Company
Materialize Streaming AI-Assisted	2019	Relational	Not Supported	Streaming AI-Assisted
Memcached Cache	2003	Key/Value	Not Supported	Cache
NeDB Abandoned	2013	Document / XML	Not Supported	Abandoned
nessDB Abandoned	2011	Key/Value	Not Supported	Abandoned
ObsessionDB OLAP Hosting Service	2024	Relational	Not Supported	OLAP Hosting Service
OlegDB MMAP NoSQL	2014	Key/Value	Not Supported	MMAP NoSQL
OnceDB Cache Abandoned Failed Company	2016	Document / XML	Not Supported	Cache Abandoned Failed Company
OrbitDB Peer-to-Peer	2015	Document / XML, Key/Value	Not Supported	Peer-to-Peer
Paper Abandoned NoSQL	2015	Key/Value, Object-Oriented	Not Supported	Abandoned NoSQL
Pika AI-Assisted	2014	Key/Value	Not Supported	AI-Assisted
Pinot OLAP AI-Assisted	2014	Relational	Not Supported	OLAP AI-Assisted
PosDB OLAP	2017	Relational	Not Supported	OLAP
PrestoDB OLAP AI-Assisted	2013	Document / XML, Key/Value, Column Family / Wide-Column, Relational	Not Supported	OLAP AI-Assisted
Prometheus Time-Series AI-Assisted	2012	Key/Value	Not Supported	Time-Series AI-Assisted
PumpkinDB Abandoned Immutable	2017	Key/Value	Not Supported	Abandoned Immutable
PupDB Abandoned	2019	Key/Value	Not Supported	Abandoned
PysonDB Abandoned NoSQL	2020	Document / XML	Not Supported	Abandoned NoSQL
Redis Cache OLTP AI-Assisted	2009	Key/Value	Not Supported	Cache OLTP AI-Assisted
ReductStore Time-Series AI-Assisted	2021	Key/Value	Not Supported	Time-Series AI-Assisted
Riak Abandoned Failed Company NoSQL	2010	Key/Value	Not Supported	Abandoned Failed Company NoSQL
RisingLight	2021	Relational	Not Supported
RisingWave Streaming AI-Assisted	2021	Relational	Not Supported	Streaming AI-Assisted
SenseiDB Abandoned	2012	Relational	Not Supported	Abandoned
SequoiaDB	2011	Document / XML	Not Supported
SimpleDB NoSQL	2007	Key/Value	Not Supported	NoSQL
Sled	2016	Key/Value	Not Supported
Spark SQL OLAP AI-Assisted	2014	—	Not Supported	OLAP AI-Assisted
SSDB Abandoned	2013	Key/Value	Not Supported	Abandoned
SwayDB Abandoned	2018	Key/Value	Not Supported	Abandoned
TieredMemDB Cache Forked Code Abandoned NoSQL	2020	Key/Value	Not Supported	Cache Forked Code Abandoned NoSQL
TileDB NoSQL	2014	Array / Matrix	Not Supported	NoSQL
TinyDB	2013	Document / XML	Not Supported
Tokyo Cabinet	2006	Key/Value	Not Supported
TrailDB Abandoned	2014	Relational	Not Supported	Abandoned
Velox OLAP Query Engine AI-Assisted	2020	Relational	Not Supported	OLAP Query Engine AI-Assisted
Zookeeper	2008	Hierarchical	Not Supported