SUNION

Syntax
SUNION key [key ...]
Available since:
1.0.0
Time complexity:
O(N) where N is the total number of elements in all given sets.
ACL categories:
@read, @set, @slow,

Returns the members of the set resulting from the union of all the given sets.

For example:

key1 = {a,b,c,d}
key2 = {c}
key3 = {a,c,e}
SUNION key1 key2 key3 = {a,b,c,d,e}

Keys that do not exist are considered to be empty sets.

Examples

redis> SADD key1 "a"
(integer) 3
redis> SADD key1 "b"
1) "one"
2) "two"
3) "three"
redis> SADD key1 "c"
1) "three"
redis> SADD key2 "c"
1) "two"
2) "three"
redis> SADD key1 "a"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key1 "b"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key1 "c"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key2 "c"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key2 "d"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key2 "e"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SUNION key1 key2
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis>

RESP2 Reply

Array reply: a list with members of the resulting set.

RESP3 Reply

Set reply: a set with the members of the resulting set.
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