map_from_entries function
Applies to: 
Databricks SQL Databricks Runtime
Creates a map created from the specified array of entries.
Syntax
map_from_entries(expr)
Arguments
expr: An ARRAY expression of STRUCT with two fields.
Returns
A MAP where keys are the first field of the structs and values the second. There must be no duplicates or nulls in the first field (the key).
Examples
SQL
> SELECT map_from_entries(array(struct(1, 'a'), struct(2, 'b')));
{1 -> a, 2 -> b}