# Activate Extensions Several PostgreSQL extensions are preinstalled and can be activated for your cluster. You can activate the extension by logging into your cluster and executing the following command: ```bash create extension CASCADE; ``` The following table shows extensions available for PostgreSQL. Extensions marked with ✅ indicate that they are active by default. Other extensions need to be activated manually and apply to PostgreSQL clusters with version 15 and above. | **Extension** | **Activated** | **Version** | **Description** | | -------------------- | :-----------: | :---------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `pg_stat_statements` | ✅ | 1.10 | Track execution statistics of all SQL statements executed. | | `intarray` | | 1.5 | Functions, operators, and index support for `1-D` arrays of integers. | | `pg_trgm` | | 1.6 | Text similarity measurement and index searching based on trigrams. | | `set_user` | ✅ | 4.0.1 | Similar to `SET ROLE` but with added logging. | | `timescaledb` | | 2.14.2 | Enables scalable inserts and complex queries for time-series data. | | `tablefunc` | | 1.0 | Functions that manipulate whole tables, including crosstab. | | `plpgsql` | ✅ | 1.0 | `PL/pgSQL` procedural language. | | `pg_partman` | | 5.1.0 | Extension to manage partitioned tables by time or ID. | | `hypopg` | | 1.4.1 | Hypothetical indexes for PostgreSQL. | | `btree_gin` | | 1.3 | Support for indexing standard datatypes in Generalized Inverted Index (GIN). | | `pg_stat_kcache` | ✅ | 2.3.0 | Kernel statistics gathering. | | `citext` | | 1.6 | Data type for case-insensitive character strings. | | `pgcrypto` | | 1.3 | Cryptographic functions. | | `earthdistance` | | 1.1 | Calculate great-circle distances on the surface of the Earth. | | `postgis` | | 3.5.0 | `PostGIS` geometry and geography spatial types and functions. | | `cube` | | 1.5 | Data type for multidimensional cubes. | | `vector` | | 0.8 | Vector data type and ivfflat and hnsw access methods. | | `uuid_ossp` | | 1.1 | Generate Universally Unique Identifiers (UUIDs). | | `hstore` | | 1.8 | Data type for storing sets of `key, value`. | | `btree_gist` | | 1.6 | Support indexing common datatypes in Generalized Search Tree (GiST). | | `pg_cron` | | 1.6 | Cron-based job scheduler for PostgreSQL to run periodic commands. The `cron_admin` role is space.vars.ionos\_cloud's mechanism for giving users the ability to manage `pg_cron` jobs without needing superuser privileges. | {% hint style="info" %} **Note:** With `select * from pg_available_extensions;` you will see more available extensions, but only those that can be activated or used with regular user rights are listed here. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ionos.com/cloud/databases/postgresql/overview/activate-extensions.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.