PostgreSQL PGVector extensions

Last update: September 28 2026Open in Markdown

You can connect extensions to PostgreSQL PGVector databases. Extensions allow you to add functionality to the database without modifying the source code of the DBMS itself.

The list of extensions available in Managed Databases can be found in the Extension descriptions table.

Some extensions require connecting a shared library.

Some extensions depend on others — dependent extensions will not work without the parent extension. The list of dependent and parent extensions can be found in the Dependent extensions table.

You can add an extension in the control panel, via the Managed Databases API, and via Terraform.

Enable shared preload libraries for extensions

Some extensions require connecting shared libraries. To connect a library, when creating a cluster or changing settings in an existing cluster, specify its name in the shared_preload_libraries setting.

The following libraries are supported in the PostgreSQL PGVector cluster:

• pg_cron — for the pg_cron extension to work;

• pg_prewarm — for the pg_prewarm extension to work.

Add extension

Extensions are connected separately to each database. If you connect a dependent extension and the parent extension is not yet connected, the parent extension will be connected automatically first, followed by the dependent extension.

1. In the Control panel, in the top menu, click Products and select Managed Databases.
2. Open the Active tab.
3. Open the cluster page → Databases tab → database card.
4. In the Extensions block, click Add extension.
5. Select an extension. The list of available extensions and their descriptions can be found in the Extension descriptions table.
6. Click Add.

Delete extension

A dependent extension can be deleted separately. To delete the parent extension, first delete the dependent one. The list of dependent and parent extensions can be found in the Dependent extensions table.

1. In the Control panel, in the top menu, click Products and select Managed Databases.
2. Open the Active tab.
3. Open the cluster page → Databases tab → database card.
4. In the Extensions block, in the extension row, click .

Extension descriptions

address_standardizer	Used to parse postal addresses passed as a string
address_standardizer_data_us	Used to parse US and Canadian postal addresses for the address_standardizer extension
autoinc	Contains the autoinc() function. This function returns the next value for a sequence stored in an integer field. Unlike built-in sequence management types, autoinc(): blocks attempts to insert a value from the query into the field; allows modifying the value in the field when updating a record
bloom	Adds access to database indexes based on Bloom filters, which require significantly less memory than hash tables but allow false positives
btree_gin	Contains example operator classes for GIN (Generalized Inverted Index), which is used for inverted search
btree_gist	Contains GiST (Generalized Search Tree) operator classes. Unlike B-tree indexes, GiST supports the <> (not equal) and < - > (distance) operators, although it does not guarantee the uniqueness of returned values
citext	Contains the citext data type used for case-insensitive string operations
cube	Contains the cube data type used to represent multidimensional cubes
dblink	Supports connecting to other PostgreSQL databases from the current session
dict_int	Contains an example of an add-on dictionary template for full-text search, which can be used to prevent excessive growth of unique word lists and increase search speed
dict_xsyn	Contains an example of an add-on Extended Synonym Dictionary template for full-text search: when searching for a word, all of its synonyms will be found
fuzzystrmatch	Contains functions used to determine the similarities and differences between strings
h3-pg	Provides an API for H3, an open-source indexing system for geographic objects in a grid of hexagonal zones (tiles). It allows you to divide a territory into identical tiles for spatial data analysis, such as generating heatmaps, analyzing traffic, and mobility. Can be used together with PostGIS for advanced spatial data analysis. The extension is available for PostgreSQL PGVector versions 15 and higher
hstore	Contains the hstore data type, which allows storing key/value pairs in a single table field and working with them efficiently
intarray	Contains functions and operators for working with integer arrays that do not contain null (NULL) values
ip4r	Supports indexing IPv4 and IPv6 addresses to improve query performance
isn	Contains data types for international product numbering standards: EAN13, UPC, ISBN, ISMN, and ISSN. Number validation and generation are performed based on a specified list of prefixes
jsonb_plperl	Adds support for json and jsonb data types to the PL/Perl procedural language. Allows you to directly use JSON data when writing functions and triggers in Perl
jsquery	Allows using the JsQuery language to work with jsonb data. JsQuery provides efficient searching in nested objects and includes additional comparison operators with index support
lo	Contains the lo data type and the lo_manage() function, which are used to manage Binary Large Objects (BLOBs) in accordance with the JDBC and ODBC driver specification requirements (standard PostgreSQL behavior does not match them)
ltree	Contains the ltree data type for representing labels of data stored in a tree-like hierarchical structure
moddatetime	Contains the moddatetime() function, which tracks the last modification time of a table row
mysql_fdw	Allows direct connection from a PostgreSQL PGVector cluster to MySQL databases using a Foreign Data Wrapper. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner; it cannot be assigned to other users. The extension is available for PostgreSQL PGVector versions 15 and higher
oracle_fdw	Allows direct connection from a PostgreSQL PGVector cluster to Oracle databases using a Foreign Data Wrapper. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner; it cannot be assigned to other users. The extension is available for PostgreSQL PGVector versions 15 and higher
pg_buffercache	Allows monitoring the state of the shared buffer cache in real time. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner; it cannot be assigned to other users. The extension is available for PostgreSQL PGVector versions 15 and higher
pg_clickhouse	Allows direct connection from a PostgreSQL PGVector cluster to ClickHouse databases using a Foreign Data Wrapper. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner; it cannot be assigned to other users. The extension is available for PostgreSQL PGVector versions 15 and higher
pg_cron	Allows you to run scheduled SQL queries inside the database. Requires connecting the shared library pg_cron. The extension can only be connected to one database in a cluster. To connect the extension to another database, first delete it from the current one. Enabling the extension will restart the cluster. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner; it cannot be assigned to other users. The extension is available for PostgreSQL PGVector versions 15 and higher
pg_prewarm	Allows you to load relation data into the operating system cache or the PostgreSQL buffer cache. Requires connecting the shared library pg_prewarm. Enabling the extension will restart the cluster. The extension is available for PostgreSQL PGVector versions 15 and higher
pg_repack	Allows you to reorganize tables and indexes without locks to reduce their size and fragmentation. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner, and cannot be assigned to other users
pg_stat_statements	Adds the ability to track planning and collect execution statistics for all SQL queries executed in the cluster. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner, and cannot be assigned to other users
pg_tm_aux	Allows creating logical replication slots in the past. The extension is available for PostgreSQL PGVector versions 15, 16, and 17
pg_trgm	Contains tools for fast similarity searches based on trigram matching. The extension is available for PostgreSQL PGVector versions 15 and higher
pg_uuidv7	Contains functions for generating UUID version 7. The extension is available for PostgreSQL PGVector version 15 and higher
pgcrypto	Provides a set of cryptographic functions for data protection. For more information about data encryption using the pgcrypto extension and usage examples, see the Data encryption instructions
pgrowlocks	Contains the pgrowlocks() function, which returns information about row locking in a specified table
pgstattuple	Provides detailed disk space usage statistics and allows you to analyze index bloat, the number of dead tuples, and free space. The extension is useful for performance diagnostics, index optimization, scheduling VACUUM operations, and using pg_repack
pgTAP	Provides a suite of tools for testing database schemas and SQL functions
plpgsql	Allows you to use the PL/pgSQL procedural language to create functions, procedures, and triggers. The extension is enabled by default and automatically available in all databases created in the cluster. You do not need to enable it separately in the control panel
plv8	Allows you to use JavaScript to write stored procedures and triggers
postgis	Allows you to store and process Geographic Information System (GIS) objects in PostgreSQL databases. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner and cannot be assigned to other users
postgis_raster	Allows you to work with raster images and analyze Geographic Information System (GIS) objects in databases
postgres_fdw	Allows direct access from a PostgreSQL PGVector cluster to data stored on external PostgreSQL servers (other clusters) using the Foreign Data Wrapper. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner and cannot be assigned to other users
prefix	Allows you to use prefixes and masks to optimize queries
rum	Adds an access method for working with RUM indexes
seg	Contains the seg data type for representing line segments or floating point intervals
tablefunc	Contains a set of functions that return tables (row sets)
tcn	Provides a trigger function for generating notifications about changes to tables to which the trigger is attached. The extension is available for PostgreSQL PGVector version 15 and higher
tsm_system_rows	Provides the SYSTEM_ROWS sampling method, which can be used in the TABLESAMPLE clause of a SELECT command. The extension is available for PostgreSQL PGVector version 15 and higher
tsm_system_time	Provides the SYSTEM_TIME sampling method, which can be used in the TABLESAMPLE clause of a SELECT command. The extension is available for PostgreSQL PGVector version 15 and higher
unaccent	Contains a dictionary for searching text without regard to diacritical marks
uuid-ossp	Contains functions for generating UUIDs using standard algorithms
xml2	Allows you to use XPath queries and the XSLT language

Dependent extensions

earthdistance	Contains a module for calculating distances between points on the surface of the Earth. Works only together with the main extension cube
pg_stat_kcache	Adds the ability to collect statistics on read and write operations performed at the file system level. Works only together with the main extension pg_stat_statements. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner and cannot be assigned to other users
pgrouting	Contains functions for geospatial routing for the PostGIS database. Works only together with the main extension postgis
postgis_tiger_geocoder	Contains functions for geocoding based on TIGER data. Works only together with the main extension postgis
postgis_topology	Contains data types and functions of the postgis extension for managing topological objects. Works only together with the main extension postgis. To use this extension, the dbaas_admin role is required. This role is automatically granted to the database owner and cannot be assigned to other users