FCALL_RO

This is a read-only variant of the [FCALL]({{< relref "/commands/fcall" >}}) command that cannot execute commands that modify data.

For more information about when to use this command vs [FCALL]({{< relref "/commands/fcall" >}}), please refer to [Read-only scripts]({{< relref "develop/programmability/#read-only_scripts" >}}).

For more information please refer to [Introduction to Redis Functions]({{< relref "/develop/programmability/functions-intro" >}}).

Redis Software and Redis Cloud compatibility

| Redis Software | Redis Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> | |:----------------------|:-----------------|:------| | <span title="Supported">✅ Standard</span> <span title="Supported"><nobr>✅ Active-Active</nobr></span> | <span title="Supported">✅ Standard</span> <span title="Supported"><nobr>✅ Active-Active</nobr></span> | |

Return information

{{< multitabs id="fcall-ro-return-info" tab1="RESP2" tab2="RESP3" >}}

The return value depends on the function that was executed.

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The return value depends on the function that was executed.

{{< /multitabs >}}