Redis Eval Command

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Redis Eval Command

Redis Scripting

The Redis Eval command executes scripts using the Lua interpreter.

Syntax

The basic syntax of the redis Eval command is as follows:

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

Parameter Description:

• script: The parameter is a Lua 5.1 script. The script does not need to (and should not) 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, these represent the Redis keys used in the script. These key name parameters can be accessed in Lua through the global variable KEYS array, with a base address of 1 (KEYS, KEYS, etc.).
• arg [arg ...]: Additional arguments, accessible in Lua through the global variable ARGV array, similar to the KEYS variable (ARGV, ARGV, etc.).

Available Version

>= 2.6.0

Example

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

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