15.6. 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.

See also bitwise_and_agg() and bitwise_or_agg().