[ovs-discuss] JSON RPC Requests -mutate and "where" condition

Ben Pfaff blp at nicira.com
Thu Jul 18 22:06:35 UTC 2013


On Thu, Jul 18, 2013 at 05:52:58PM -0400, Dmita Levy wrote:
> Hello,
> 
> I was looking through the IETF draft document for making JSON RPC request
> to OVS and noticed the following:
> 
> *"where": [<condition>*]       required*
> 
> I don't quite understand what should be in the [<condition>*] array
> that is sent with the request.  This mutate request is doing what
> exactly?
> 
>             "op" : "mutate",
>             "table" : "Bridge",
>             "where" : [
>                 [
>                     "_uuid",
>                     "==",
>                     [
>                         "uuid",
>                         "18d02a5e-6150-4ddf-9446-a8e7e87f7955"
>                     ]
>                 ]
>             ],

This "where" clause says to match only rows that have UUID
18d02a5e-6150-4ddf-9446-a8e7e87f7955 in the _uuid column (which will
be exactly zero or one rows).



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