The following table describes the arguments for this command:

Argument	Required/Optional	Description
map	Required	Map data type. Map with key-value pair elements from which you want to retrieve the values. You can enter any valid transformation expression.

Array.

The data type of values in the map determines the data type of the array elements. For example, if the value is of integer type, the function generates array data with integer elements.

Returns -1 if the map value is null.

Returns NULL if the map is null.

The following expression generates an array with elements of string type.