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EXISTS

Last updated 
EXISTS key [key ...]
Group
Keys
Complexity
O(N) for N keys
Arity
-2 (at least 2 words, counting the command name)
Flags
read-only, fast
Keys
first 1, last final argument, step 1
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EXISTS tells you whether keys exist. With several keys it returns how many of them exist, and a key named twice is counted twice. Checking a key does not count as an access to it, so it does not change the key’s idle time or access frequency.

Return value

Section titled “Return value”
Case RESP2 RESP3
Always Integer: the number of named keys that exist Integer

Examples

Section titled “Examples”
127.0.0.1:6379> SET user:1 "ada"
OK
127.0.0.1:6379> EXISTS user:1
(integer) 1
127.0.0.1:6379> EXISTS user:1 user:1 user:2
(integer) 2

Compatibility

Section titled “Compatibility”

Same as Redis 7 and Valkey 8.

See also

Section titled “See also”

TOUCH, TYPE, DEL, SCAN