CARDINALITY (Map, Lakehouse v2)

Returns the number of key-value pairs in a map.

Analyze Syntax

func.cardinality(get_column(table, 'map_col'))

Analyze Examples

func.cardinality(MAP{'a':1,'b':2,'c':3})

┌───┐
│ 3 │
└───┘

SQL Syntax

CARDINALITY(<map_col>)

SQL Examples

SELECT CARDINALITY(MAP{'a':1, 'b':2, 'c':3});

┌───┐
│ 3 │
└───┘