HLL_UNION (Lakehouse v2)

Returns the union of multiple HLL values.

Analyze Syntax

func.hll_union(get_column(table, 'hll_col'))

Analyze Examples

func.hll_union(get_column(table, 'hll_col'))

┌─────────────┐
│ (hll value) │
└─────────────┘

SQL Syntax

HLL_UNION(<hll_col>)

SQL Examples

SELECT HLL_CARDINALITY(HLL_UNION(hll_col)) FROM daily_sketches;

┌───────┐
│ 12500 │
└───────┘