Additional Supplied Modules

This section describes additional modules available in the Greenplum Database installation. These modules may be PostgreSQL- or Greenplum-sourced.

contrib modules are typically packaged as extensions. You register a module in a database using the CREATE EXTENSION command. You remove a module from a database with DROP EXTENSION.

The following Greenplum Database and PostgreSQL contrib modules are installed; refer to the linked module documentation for usage instructions.

• advanced_password_check Provides password quality checking and policy definition for Greenplum Database.
• auto_explain Provides a means for logging execution plans of slow statements automatically.
• btree_gin - Provides sample generalized inverted index (GIN) operator classes that implement B-tree equivalent behavior for certain data types.
• citext - Provides a case-insensitive, multibyte-aware text data type.
• dblink - Provides connections to other Greenplum databases.
• diskquota.md# - Allows administrators to set disk usage quotas for Greenplum Database roles and schemas.
• fuzzystrmatch - Determines similarities and differences between strings.
• gp_exttable_fdw - Built-in foreign-data wrapper that internally converts an external table to a foreign table.
• gp_legacy_string_agg - Implements a legacy, single-argument string_agg() aggregate function that was present in Greenplum Database 5.
• gp_sparse_vector - Implements a Greenplum Database data type that uses compressed storage of zeros to make vector computations on floating point numbers faster.
• greenplum_fdw - Provides a foreign data wrapper (FDW) for accessing data stored in one or more external Greenplum Database clusters.
• hstore - Provides a data type for storing sets of key/value pairs within a single PostgreSQL value.
• h3 - Provides hexagonal hierarchical geospatial indexing.
• ip4r - Provides data types for operations on IPv4 and IPv6 IP addresses.
• ltree - Provides data types for representing labels of data stored in a hierarchical tree-like structure.
• orafce - Provides Greenplum Database-specific Oracle SQL compatibility functions.
• pageinspect - Provides functions for low level inspection of the contents of database pages; available to superusers only.
• pg_cron - Provides a cron-based job scheduler that runs inside the database.
• pg_hint_plan - Provides functions for tweaking PostgreSQL execution plans with hints in SQL comments.
• pg_trgm - Provides functions and operators for determining the similarity of alphanumeric text based on trigram matching. The module also provides index operator classes that support fast searching for similar strings.
• pg_buffercache - Provides access to five views for obtaining cluster-wide shared buffer metrics.
• pgcrypto - Provides cryptographic functions for Greenplum Database.
• postgresml - Provides functions for using tens of thousands of pre-trained open source AI/machine learning models in VMware Greenplum.
• pgvector - Provides vector similarity search capabilities for Greenplum Database that enable searching, storing, and querying machine language-generated embeddings at large scale.
• postgres_fdw - Provides a foreign data wrapper (FDW) for accessing data stored in an external PostgreSQL or Greenplum database.
• postgresql-hll - Provides HyperLogLog data types for PostgreSQL and Greenplum Database.
• sslinfo - Provides information about the SSL certificate that the current client provided when connecting to Greenplum.
• tablefunc - Provides various functions that return tables (multiple rows).
• timestamp9 - Provides an efficient nanosecond-precision timestamp data type for Greenplum Database.
• tsm_system_rows - Implements the SYSTEM_ROWS table sampling method.
• tsm_system_time - implements the SYSTEM_TIME table sampling method.
• uuid-ossp - Provides functions to generate universally unique identifiers (UUIDs).