DS_HLL_COMBINE (Lakehouse v2)

Combine plusieurs sketches HLL DataSketches en un seul sketch.

Syntaxe Analyze

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

Exemples Analyze

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

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

Syntaxe SQL

DS_HLL_COMBINE(<sketch_column>)

Exemples SQL

SELECT DS_HLL_ESTIMATE(DS_HLL_COMBINE(sketch_col)) FROM daily_sketches;

┌───────┐
│ 25000 │
└───────┘