Help Center/ Data Lake Insight/ Spark SQL Syntax Reference/ Built-In Functions/ Mathematical Functions/ shiftleft
Updated on 2023-10-25 GMT+08:00
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shiftleft

This function is used to perform a signed bitwise left shift. It takes the binary number a and shifts it b positions to the left.

Syntax

shiftleft(BIGINT a, BIGINT b)

Parameters

Table 1 Parameters

Parameter

Mandatory

Type

Description

a

Yes

DOUBLE, BIGINT, DECIMAL, or STRING

The value can be a float, integer, or string.

If the value is not of the BIGINT type, the system will implicitly convert it to the BIGINT type for calculation.

b

Yes

DOUBLE, BIGINT, DECIMAL, or STRING

The value can be a float, integer, or string.

If the value is not of the BIGINT type, the system will implicitly convert it to the BIGINT type for calculation.

Return Values

The return value is of the INT type.

If the value of a or b is NULL, NULL is returned.

Example Code

The value 8 is returned.

select shiftleft(1,3);

The value 48 is returned.

select shiftleft(6,3);

The value 48 is returned.

select shiftleft(6.123456,3.123456);

The value NULL is returned.

select shiftleft(null,3);
Parent topic: Mathematical Functions