DBMS > LevelDB vs. PostgreSQL vs. SAP Advantage Database Server
System Properties Comparison LevelDB vs. PostgreSQL vs. SAP Advantage Database Server
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|Editorial information provided by DB-Engines|
|Name||LevelDB Xexclude from comparison||PostgreSQL Xexclude from comparison||SAP Advantage Database Server former name: Sybase ADS Xexclude from comparison|
|SAP Advantage Database Server seems to be discontinued. Therefore it is excluded from the DB-Engines Ranking.|
|Description||Embeddable fast key-value storage library that provides an ordered mapping from string keys to string values||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||Low-cost RDBMS with access to ISAM and FoxPro data structures|
|Primary database model||Key-value store||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Relational DBMS|
|Secondary database models||Document store|
Graph DBMS with Apache Age
Vector DBMS with pgvector extension
|Developer||PostgreSQL Global Development Group www.postgresql.org/developer||Sybase, SAP|
|Initial release||2011||1989 1989: Postgres, 1996: PostgreSQL||1993|
|Current release||1.23, February 2021||16.0, September 2023|
|License Commercial or Open Source||Open Source BSD||Open Source BSD||commercial|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Aiven for PostgreSQL: Fully managed and hosted PostgreSQL® with 70+ extensions and orchestration tooling included.|
|Server operating systems||Illumos|
|Typing predefined data types such as float or date||no||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||yes specific XML-type available, but no XML query functionality.||no|
|SQL Support of SQL||no||yes standard with numerous extensions||yes|
|APIs and other access methods||ADO.NET|
native C library
streaming API for large objects
|.NET Client API|
|Supported programming languages||C++|
Java 3rd party binding
Python 3rd party binding
|Server-side scripts Stored procedures||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||yes|
|Partitioning methods Methods for storing different data on different nodes||none||partitioning by range, list and (since PostgreSQL 11) by hash||none|
|Replication methods Methods for redundantly storing data on multiple nodes||none||Source-replica replication other methods possible by using 3rd party extensions||Multi-source replication CONFLICT Trigger to resolve replication conflicts|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes with automatic compression on writes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||no||no caching of (temporary) tables can be configured|
|User concepts Access control||no||fine grained access rights according to SQL-standard||fine grained access rights according to SQL-standard|
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|LevelDB||PostgreSQL||SAP Advantage Database Server former name: Sybase ADS|
|DB-Engines blog posts|
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