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Presto 350 Documentation Bitwise Functions

Bitwise Functions#

bit_count(x, bits) → bigint#

Count the number of bits set in x (treated as bits-bit signed integer) in 2’s complement representation:

SELECT bit_count(9, 64); -- 2
SELECT bit_count(9, 8); -- 2
SELECT bit_count(-7, 64); -- 62
SELECT bit_count(-7, 8); -- 6

bitwise_and(x, y) → bigint#: Returns the bitwise AND of x and y in 2’s complement representation.

bitwise_not(x) → bigint#: Returns the bitwise NOT of x in 2’s complement representation.

bitwise_or(x, y) → bigint#: Returns the bitwise OR of x and y in 2’s complement representation.

bitwise_xor(x, y) → bigint#: Returns the bitwise XOR of x and y in 2’s complement representation.

bitwise_left_shift(value, shift) → [same as value]#: Returns the left shifted value of value.

bitwise_right_shift(value, shift, digits) → [same as value]#: Returns the logical right shifted value of value.

bitwise_right_shift_arithmetic(value, shift) → [same as value]#: Returns the arithmetic right shifted value of value.

See also bitwise_and_agg() and bitwise_or_agg().