DS_HLL_ESTIMATE (Lakehouse v2)

Estimates the cardinality from a DataSketches HLL sketch.

Analyze Syntax

func.ds_hll_estimate(get_column(table, 'hll_sketch'))

Analyze Examples

func.ds_hll_estimate(get_column(table, 'hll_sketch'))

┌──────┐
│ 9856 │
└──────┘

SQL Syntax

DS_HLL_ESTIMATE(<sketch>)

SQL Examples

SELECT DS_HLL_ESTIMATE(DS_HLL_ACCUMULATE(user_id)) FROM visits;

┌──────┐
│ 9856 │
└──────┘