array_reverse_sort
array_reverse_sort
array_reverse_sort
description
Syntax
ARRAY<T> array_reverse_sort(ARRAY<T> arr)
Return the array which has been sorted in descending order. Return NULL for NULL input. If the element of array is NULL, it will be placed in the last of the sorted array.
notice
Only supported in vectorized engine
example
mysql> set enable_vectorized_engine=true;
mysql> select k1, k2, array_reverse_sort(k2) from array_test;
+------+-----------------------------+-----------------------------+
| k1 | k2 | array_reverse_sort(`k2`) |
+------+-----------------------------+-----------------------------+
| 1 | [1, 2, 3, 4, 5] | [5, 4, 3, 2, 1] |
| 2 | [6, 7, 8] | [8, 7, 6] |
| 3 | [] | [] |
| 4 | NULL | NULL |
| 5 | [1, 2, 3, 4, 5, 4, 3, 2, 1] | [5, 4, 4, 3, 3, 2, 2, 1, 1] |
| 6 | [1, 2, 3, NULL] | [3, 2, 1, NULL] |
| 7 | [1, 2, 3, NULL, NULL] | [3, 2, 1, NULL, NULL] |
| 8 | [1, 1, 2, NULL, NULL] | [2, 1, 1, NULL, NULL] |
| 9 | [1, NULL, 1, 2, NULL, NULL] | [2, 1, 1, NULL, NULL, NULL] |
+------+-----------------------------+-----------------------------+
mysql> select k1, k2, array_reverse_sort(k2) from array_test01;
+------+------------------------------------------+------------------------------------------+
| k1 | k2 | array_reverse_sort(`k2`) |
+------+------------------------------------------+------------------------------------------+
| 1 | ['a', 'b', 'c', 'd', 'e'] | ['e', 'd', 'c', 'b', 'a'] |
| 2 | ['f', 'g', 'h'] | ['h', 'g', 'f'] |
| 3 | [''] | [''] |
| 3 | [NULL] | [NULL] |
| 5 | ['a', 'b', 'c', 'd', 'e', 'a', 'b', 'c'] | ['e', 'd', 'c', 'c', 'b', 'b', 'a', 'a'] |
| 6 | NULL | NULL |
| 7 | ['a', 'b', NULL] | ['b', 'a', NULL] |
| 8 | ['a', 'b', NULL, NULL] | ['b', 'a', NULL, NULL] |
+------+------------------------------------------+------------------------------------------+
keywords
ARRAY, SORT, REVERSE, ARRAY_SORT, ARRAY_REVERSE_SORT
