TRANSFORM_KEYS
Applies a lambda expression to transform the keys of a map.
Analyze Syntax
func.transform_keys(get_column(table, 'map_col'), lambda k, v: upper(k))
Analyze Examples
func.transform_keys(MAP{'a':1,'b':2}, lambda k,v: upper(k))
┌───────────────┐
│ {'A':1,'B':2} │
└───────────────┘
SQL Syntax
TRANSFORM_KEYS(<map_col>, lambda k, v: upper(k))
SQL Examples
SELECT TRANSFORM_KEYS((k, v) -> UPPER(k), MAP{'a':1, 'b':2});
┌───────────────┐
│ {"A":1,"B":2} │
└───────────────┘