Redis Eval Command

Redis Scripts

Redis Eval Command uses the Lua interpreter to execute scripts.

Syntax

Basic Syntax of Redis Eval Command

redis　127.0.0.1:6379> EVAL script numkeys key [key ...] arg [arg ...]

Parameter Description:

• script: The parameter is a Lua 5.1 : The script program. The script does not need (nor should it) be defined as a Lua function.

• numkeys: Used to specify the number of key name parameters.

• key [key ...]: Starting from the third parameter of EVAL, it represents the Redis keys (key) used in the script, these key name parameters can be accessed in Lua through the global variable KEYS array, using 1 : Access in the form of base address ( KEYS[1] , KEYS[2] , and so on).

• arg [arg ...]: Additional parameters, accessible in Lua through the global variable ARGV array, accessed in a similar manner to KEYS variable ( ARGV[1] , ARGV[2] , such as this).

Available Versions

>= 2.6.0

Online Examples

redis　127.0.0.1:6379> eval "return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]"　2　key1　key2　first second
1) "key1"
2) "key2"
3) "first"
4) "second"

Redis Scripts