Working with extensions and foreign data wrappers - Amazon Aurora
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Working with extensions and foreign data wrappers

To extend the functionality to your Aurora PostgreSQL-Compatible Edition DB cluster, you can install and use various PostgreSQL extensions. For example, if your use case calls for intensive data entry across very large tables, you can install the pg_partman extension to partition your data and thus spread the workload.


As of Aurora PostgreSQL 14.5, Aurora PostgreSQL supports Trusted Language Extensions for PostgreSQL. This feature is implemented as the extension pg_tle, which you can add to your Aurora PostgreSQL. By using this extension, developers can create their own PostgreSQL extensions in a safe environment that simplifies the setup and configuration requirements, as well as much of the preliminary testing for new extensions. For more information, see Working with Trusted Language Extensions for PostgreSQL.

In some cases, rather than installing an extension, you might add a specific module to the list of shared_preload_libraries in your Aurora PostgreSQL DB cluster's custom DB cluster parameter group. Typically, the default DB cluster parameter group loads only the pg_stat_statements, but several other modules are available to add to the list. For example, you can add scheduling capability by adding the pg_cron module, as detailed in Scheduling maintenance with the PostgreSQL pg_cron extension. As another example, you can log query execution plans by loading the auto_explain module. To learn more, see Logging execution plans of queries in the Amazon knowledge center.

An extension that provides access to external data is more specifically known as a foreign data wrapper (FDW). As one example, the oracle_fdw extension allows your Aurora PostgreSQL DB cluster to work with Oracle databases.

You can also specify precisely which extensions can be installed on your Aurora PostgreSQL DB instance, by listing them in the rds.allowed_extensions parameter. For more information, see Restricting installation of PostgreSQL extensions.

Following, you can find information about setting up and using some of the extensions, modules, and FDWs available for Aurora PostgreSQL. For simplicity's sake, these are all referred to as "extensions." You can find listings of extensions that you can use with the currently available Aurora PostgreSQL versions, see Extension versions for Amazon Aurora PostgreSQL in the Release Notes for Aurora PostgreSQL.