[Developers] Query for Can't query for values of /type/text ina write, only those of /type/id

[Arthur van Hoff]

Hmm. I don't understand why I can't query for an object's name (or any
other field for that matter) when I update an object. Why are ids and
guids special? 

As a result I have to write two queries, one to do the write, followed
by one to query various properties of the objects I have just written.
Why? 

-----Original Message-----
From: developers-bounces at freebase.com
[mailto:developers-bounces at freebase.com] On Behalf Of Kurt Bollacker
Sent: Sunday, December 23, 2007 6:22 PM
To: For discussions about MQL,Freebase API and apps built on Freebase
Subject: Re: [Developers] Query for Can't query for values of /type/text
ina write, only those of /type/id


On Sun, Dec 23, 2007 at 05:53:12PM -0800, Arthur van Hoff wrote:
> Hi,
> 
> 
> Why can't I query for names in a write? Why isn't a write query
> semantically the same as a read query, only with side effects?

Reads and writes in MQL very very different beasts.  While it would be
logically possible to include arbitrary read clauses in a MQL write,
the syntax rules for writes would become far more complex than they
are now.  (e.g. Consider even the problem of ordering read and write
subclauses when the writes would affect what is being read.)  In
general, the only explicit read clause you can make in a write is for
"id" and "guid".

If there is something you cannot do or do easily because of this,
please speak up!

								Kurt :-)

 
>  
> 
> Have fun,
> 
>  
> 
>     Arthur van Hoff
> 
>  
> 
> ___________________________________________
> 
> Arthur van Hoff, Dell-ZING, CTO Software and Services.
> 
> W: 650-267-2413, F: 650-267-2498, M: 650-283-0842
> 
>  
> 

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