BITOP

The BITOP command performs bitwise operations between strings and stores the result in a destination key.

Syntax

BITOP operation destkey key [key ...]

Parameters

• operation - The bitwise operation to perform. Can be one of: AND, OR, XOR, NOT
• destkey - The destination key where the result is stored
• key - One or more source keys (NOT operation accepts only one key)

Operations

• AND - Bitwise AND operation
• OR - Bitwise OR operation
• XOR - Bitwise XOR operation
• NOT - Bitwise NOT operation (requires exactly one source key)

Return

Integer reply: the length of the string stored in the destination key, which is equal to the length of the longest input string.

Examples

redis> SETBIT key1 0 1
(integer) 0
redis> SETBIT key1 1 0
(integer) 0
redis> SETBIT key2 0 1
(integer) 0
redis> SETBIT key2 1 1
(integer) 0
redis> BITOP AND result key1 key2
(integer) 1
redis> GETBIT result 0
(integer) 1
redis> GETBIT result 1
(integer) 0
redis> BITOP OR result_or key1 key2
(integer) 1
redis> BITOP NOT result_not key1
(integer) 1

Notes

• Non-existent keys are treated as empty strings (all bits set to 0).
• The result length is equal to the length of the longest input string.
• NOT operation requires exactly one source key.
• The operation is performed byte by byte.