Bitwise XOR

All functions > BITWISE > Bitwise XOR

Returns the bitwise XOR (exclusive OR) of two bitstrings.

Syntax

BITWISE_XOR(left, right)

BITWISE_XOR(left, right)

Notes

• Both operands must have the same length
• Each bit position is XORed independently: different bits = 1, same bits = 0
• XOR is its own inverse: BITWISE_XOR(BITWISE_XOR(a, b), b) = a for the same-length bitstrings a, b
• Returns NULL if either input is NULL
• The ^ token is numeric exponentiation in FeatureQL, not bitstring XOR—use BITWISE_XOR

Related Functions

• BITWISE_XOR()

Examples

SELECT
    f1 := BITWISE_XOR('1010'::BITSTRING, '0110'::BITSTRING)::VARCHAR, -- Different bits become 1
    f2 := BITWISE_XOR('1111'::BITSTRING, '1111'::BITSTRING)::VARCHAR, -- Same bits cancel out
    f3 := BITWISE_XOR('1010'::BITSTRING, '0000'::BITSTRING)::VARCHAR -- XOR with zero preserves bits
;