DS_HLL_COMBINE (Lakehouse v2)

Combines multiple DataSketches HLL sketches into a single sketch.

Analyze Syntax

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

Analyze Examples

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

┌───────────────────┐
│ (combined sketch) │
└───────────────────┘

SQL Syntax

DS_HLL_COMBINE(<sketch_column>)

SQL Examples

SELECT DS_HLL_ESTIMATE(DS_HLL_COMBINE(sketch_col)) FROM daily_sketches;

┌───────┐
│ 25000 │
└───────┘