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 - Allows administrators to set disk usage quotas for Greenplum Database roles and schemas.
    • fuzzystrmatch - Determines similarities and differences between strings.
    • gp_array_agg - Implements a parallel array_agg() aggregate function for Greenplum Database.
    • gp_legacy_string_agg - Implements a legacy, single-argument string_agg() aggregate function that was present in Greenplum Database 5.
    • gp_parallel_retrieve_cursor - Provides extended cursor functionality to retrieve data, in parallel, directly from Greenplum Database segments.
    • gp_percentile_agg - Improves GPORCA performance for ordered-set aggregate functions.
    • gp_pitr - Supports implementing Point-in-Time Recovery for Greenplum Database 6.
    • 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.
    • gp_subtransaction_overflow - Provides a view and user-defined function for querying for suboverflowed backends.
    • hstore - Provides a data type for storing sets of key/value pairs within a single PostgreSQL value.
    • 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_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.
    • pgcrypto - Provides cryptographic functions for Greenplum Database.
    • 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.
    • uuid-ossp - Provides functions to generate universally unique identifiers (UUIDs).