The following table describes the arguments for this command:

Argument	Required/Optional	Description
map_keys	Required	Array type with elements of primitive data type. Array of elements that you want to add as keys of the map data. You can enter any valid transformation expression.
map_values	Required	Array type with elements of any data type. Array of elements that you want to add as values for keys of the map data. You can enter any valid transformation expression.

The number of elements in the map_keys array and map_values array must match. If you use the MAP function in an output expression for a map port, the data type of the function arguments must match the data type of the map elements specified in the type configuration for the map port.

Map.

The data type of arguments determines the data type of the map elements. For example, if you pass integer arguments as key and struct arguments as value, the function generates map data with a key-value pair of integer and struct types.

The following expression generates a map from the array elements of string type.