The postgresql-hll module provides native HyperLogLog data types and relation functions, operators, and aggregates.

The Greenplum Database postgresql-hll module is equivalent to version 2.16 of the postgresql-hll used with PostgreSQL. There are no Greenplum Database or MPP-specific considerations for the module.

Installing and Registering the Module

The postgresql-hll module is installed when you install Greenplum Database. Before you can use the data types defined in the module, you must register the hll extension in each database in which you want to use the types:


Refer to Installing Additional Supplied Modules for more information.

Module Documentation

Refer to the postgresql-hll github documentation for detailed information about using the module.

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