SUBSTR (deprecated)
As of Redis version 2.0.0, this command is regarded as deprecated.
It can be replaced by GETRANGE
when migrating or writing new code.
Syntax
SUBSTR key start end
- Available since:
- 1.0.0
- Time complexity:
- O(N) where N is the length of the returned string. The complexity is ultimately determined by the returned length, but because creating a substring from an existing string is very cheap, it can be considered O(1) for small strings.
- ACL categories:
-
@read
,@string
,@slow
,
Returns the substring of the string value stored at key
, determined by the
offsets start
and end
(both are inclusive).
Negative offsets can be used in order to provide an offset starting from the end
of the string.
So -1 means the last character, -2 the penultimate and so forth.
The function handles out of range requests by limiting the resulting range to the actual length of the string.