postgresql-11-hll - 2.12-3 main

This PostgreSQL module introduces a new data type `hll` which is a HyperLogLog
data structure. HyperLogLog is a fixed-size, set-like structure used for
distinct value counting with tunable precision. For example, in 1280 bytes
`hll` can estimate the count of tens of billions of distinct values with only
a few percent error.