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.
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:
CREATE EXTENSION hll;
Refer to Installing Additional Supplied Modules for more information.
Refer to the postgresql-hll github documentation for detailed information about using the module.