List key-value pairs with keys in range (key_start, key_end].
("", ""] means no range limit.
This command can do wildchar * like search, but only prefix search, and the * char must never occur in key_start and key_end!
key_start - The lower bound(not included) of keys to be returned, empty string means -inf(no limit).key_end - The upper bound(inclusive) of keys to be returned, empty string means +inf(no limit).limit - Up to that many pairs will be returned.false on error, otherwise an associative array containing the key-value pairs.
ssdb 127.0.0.1:8888> scan "" "" 10
key value
-------------------------
a : 1
aa : 1
b : 2
c : 3
2 result(s) (0.000 sec)
ssdb 127.0.0.1:8888> scan "a" "" 10
key value
-------------------------
aa : 1
b : 2
c : 3
2 result(s) (0.000 sec)
# 'a' is not returned. while key_end is not set, 'b', 'c' are returned!
ssdb 127.0.0.1:8888> scan a a} 10
key value
-------------------------
aa : 1
1 result(s) (0.000 sec)
(0.000 sec)
# "real" prefix search
ssdb 127.0.0.1:8888> scan "a" "b" 10
key value
-------------------------
aa : 1
b : 2
2 result(s) (0.000 sec)
# set key_end as 'b'(inclusive), so 'b' is returned! 'c' is not.