EVAL_RO · Valkey

EVAL_RO

Executes a read-only server-side Lua script.

Usage

EVAL_RO script numkeys key [key…] arg [arg…]

Description

This is a read-only variant of the EVAL command that cannot execute commands that modify data.

For more information about when to use this command vs EVAL, please refer to Read-only scripts.

For more information about EVAL scripts please refer to Introduction to Eval Scripts.

Reply

The return value depends on the script that was executed.

Complexity

Depends on the script that is executed.

ACL Categories

@scripting @slow

Examples

> SET mykey "Hello"
OK

> EVAL_RO "return server.call('GET', KEYS[1])" 1 mykey
"Hello"

> EVAL_RO "return server.call('DEL', KEYS[1])" 1 mykey
(error) ERR Error running script (call to b0d697da25b13e49157b2c214a4033546aba2104): @user_script:1: @user_script: 1: Write commands are not allowed from read-only scripts.

History

See also

EVAL, EVALSHA, EVALSHA_RO, FCALL, FCALL_RO, FUNCTION, FUNCTION DELETE, FUNCTION DUMP, FUNCTION FLUSH, FUNCTION HELP, FUNCTION KILL, FUNCTION LIST, FUNCTION LOAD, FUNCTION RESTORE, FUNCTION STATS, SCRIPT, SCRIPT DEBUG, SCRIPT EXISTS, SCRIPT FLUSH, SCRIPT HELP, SCRIPT KILL, SCRIPT LOAD, SCRIPT SHOW.