Shifts the bits in the first argument to the left by n bits, where n is the second argument. Shifting left by n positions is equivalent to multiplying the number by 2^n.
Syntax
BIT_SHIFT_LEFT(<value>, <bits>)
Parameters
| Parameter | Description | Supported input types |
|---|
<value> | Specifies the value to shift. | INT, BIGINT |
<bits> | The number of bits to shift. | INT |
Return Types
The BIT_SHIFT_LEFT function returns a result of either type INT or BIGINT, depending on the type of the input <expression>.
Examples
Example
The following code example shifts 0001, the binary representation of 1, to the left by two bits, which yields 0100, the binary representation for 4:
SELECT bit_shift_left(1, 2) AS res;
Rows: 1Execution time: 6.13ms
00101, the binary representation of 5, to the left by two bits, which yields 10100, the binary representation of 20:
SELECT bit_shift_left(5, 2) AS res;
Rows: 1Execution time: 6.22ms
-3, which is 1111111111111101 in signed two’s complement, one bit to the left, resulting in 1111111111111010, the binary signed two’s complement of -6:
SELECT bit_shift_left(-3, 1) AS res;
Rows: 1Execution time: 5.09ms
