usage-of-lua-scripts-in-redis.md

Usage of LUA scripts in Redis

redis-cli EVAL "return redis.call('get', KEYS[1]) + redis.call('get', KEYS[2]);" 2 key1 key2

• redis-cli - executes Redis command in bash
• EVAL - evaluates specified LUA code
• redis.call - call Redis method
• 'get' - gets value by Redis key
• KEYS[1] - refers to first argument passed to EVAL command (key1)
• KEYS[2] - refers to second argument passed to EVAL command (key2)
• 2 key1 key2 - number of arguments we'll pass to the command and the arguments themselves

group: eval

Example:

redis-cli EVAL "return redis.call('get', KEYS[1]) + redis.call('get', KEYS[2]);" 2 key1 key2

(integer) 138