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reverse

Description​

Reverses a string or array. Returns a string or array with the characters in the string or array elements in reverse order.

Syntax​

reverse(param)

Parameters​

param: the string or array to reverse. It can be of the VARCHAR, CHAR, or ARRAY type.

Currently, this function supports only one-dimensional arrays and the array elements cannot be of the DECIMAL type. This function supports the following types of array elements: BOOLEAN, TINYINT, SMALLINT, INT, BIGINT, LARGEINT, FLOAT, DOUBLE, VARCHAR, DECIMALV2, DATETIME, DATE, and JSON. JSON is supported from 2.5.

Return value​

The return type is the same as param.

Examples​

Example 1: Reverse a string.

MySQL > SELECT REVERSE('hello');
+------------------+
| REVERSE('hello') |
+------------------+
| olleh            |
+------------------+
1 row in set (0.00 sec)

Example 2: Reverse an array.

MYSQL> SELECT REVERSE([4,1,5,8]);
+--------------------+
| REVERSE([4,1,5,8]) |
+--------------------+
| [8,5,1,4]          |
+--------------------+