map_entries function
Applies to: 
Databricks SQL Databricks Runtime
Returns an unordered array of all entries in map.
Syntax
map_entries(map)
Arguments
map: A MAP expression.
Returns
An ARRAY of STRUCTs holding key-value pairs.
Examples
> SELECT map_entries(map(1, 'a', 2, 'b'));
[{1, a}, {2, b}]