log2

Description

Calculates the base 2 logarithm of a number.

Syntax

log2(arg)

Parameters

• arg: The value whose logarithm you want to calculate. Only DOUBLE data type is supported.

NOTE

StarRocks returns NULL if arg is specified as a negative or 0.

Return value

Returns a value of the DOUBLE data type.

Example

Example 1: Calculate the base 2 logarithm of 8.

mysql> select log2(8);
+---------+
| log2(8) |
+---------+
|       3 |
+---------+
1 row in set (0.00 sec)