Function	Description
element_at(array, index)	Returns element of array at given (1-based) index. If Index is 0, Spark will throw an error. If index < 0, accesses elements from the last to the first. The function returns NULL if the index exceeds the length of the array and `spark.sql.ansi.enabled` is set to false. If `spark.sql.ansi.enabled` is set to true, it throws ArrayIndexOutOfBoundsException for invalid indices.
element_at(map, key)	Returns value for given key. The function returns NULL if the key is not contained in the map and `spark.sql.ansi.enabled` is set to false. If `spark.sql.ansi.enabled` is set to true, it throws NoSuchElementException instead.
map(key0, value0, key1, value1, ...)	Creates a map with the given key/value pairs.
map_concat(map, ...)	Returns the union of all the given maps
map_contains_key(map, key)	Returns true if the map contains the key.
map_entries(map)	Returns an unordered array of all entries in the given map.
map_from_arrays(keys, values)	Creates a map with a pair of the given key/value arrays. All elements in keys should not be null
map_from_entries(arrayOfEntries)	Returns a map created from the given array of entries.
map_keys(map)	Returns an unordered array containing the keys of the map.
map_values(map)	Returns an unordered array containing the values of the map.
str_to_map(text[, pairDelim[, keyValueDelim]])	Creates a map after splitting the text into key/value pairs using delimiters. Default delimiters are ',' for `pairDelim` and ':' for `keyValueDelim`. Both `pairDelim` and `keyValueDelim` are treated as regular expressions.
try_element_at(array, index)	Returns element of array at given (1-based) index. If Index is 0, Spark will throw an error. If index < 0, accesses elements from the last to the first. The function always returns NULL if the index exceeds the length of the array.
try_element_at(map, key)	Returns value for given key. The function always returns NULL if the key is not contained in the map.