DBMS > MySQL vs. PouchDB vs. Spark SQL
System Properties Comparison MySQL vs. PouchDB vs. Spark SQL
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|Editorial information provided by DB-Engines|
|Name||MySQL Xexclude from comparison||PouchDB Xexclude from comparison||Spark SQL Xexclude from comparison|
|Primary database model||Relational DBMS Key/Value like access via memcached API||Document store||Relational DBMS|
|Secondary database models||Document store|
|Developer||Oracle since 2010, originally MySQL AB, then Sun||Apache Software Foundation||Apache Software Foundation|
|Current release||8.0.32, January 2023||7.1.1, June 2019||3.3.0 ( 2.13), June 2022|
|License Commercial or Open Source||Open Source GPL version 2. Commercial licenses with extended functionallity are available||Open Source||Open Source Apache 2.0|
|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||no||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||no||no|
|Secondary indexes||yes||yes via views||no|
|SQL Support of SQL||yes with proprietary extensions||no||SQL-like DML and DDL statements|
|APIs and other access methods||ADO.NET|
Proprietary native API
|HTTP REST only for PouchDB Server|
|Supported programming languages||Ada|
|Partitioning methods Methods for storing different data on different nodes||horizontal partitioning, sharding with MySQL Cluster or MySQL Fabric||Sharding with a proxy-based framework, named couchdb-lounge||yes, utilizing Spark Core|
|Replication methods Methods for redundantly storing data on multiple nodes||Multi-source replication|
|Multi-source replication also with CouchDB databases|
Source-replica replication also with CouchDB databases
|MapReduce Offers an API for user-defined Map/Reduce methods||no||yes|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Eventual Consistency|
|Foreign keys Referential integrity||yes not for MyISAM storage engine||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID not for MyISAM storage engine||no||no|
|Concurrency Support for concurrent manipulation of data||yes table locks or row locks depending on storage engine||yes|
|Durability Support for making data persistent||yes||yes by using IndexedDB, WebSQL or LevelDB as backend||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes||yes||no|
|User concepts Access control||Users with fine-grained authorization concept no user groups or roles||no||no|
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