separating TAP and query languages

[Guy Rixon]

BTW, if it really is ADQL that you consider expensive, why do you keep  
dragging in other topics? VOSI is not expensive; why keep bringing it  
up? And why do you mention authentication? ADQL does not imply  
authentication; you'd only fit it to a TAP service if you wanted  
access control.

On 23 Feb 2009, at 15:37, Roy Williams wrote:

>
>>
>> How do you know that these things cost "years of effort"? Have you  
>> spent years implementing them?
> I'm thinking of ADQL. Years to *robust* implementation (not just  
> prototype). I think of 3-page ADQL expressions full of variable  
> names and metadata. Getting the types and metadata right between  
> SQLServer and ADQL. Proper error returns that tell the user how to  
> fix it, rather than just NullPointerException. A REGION with a  
> thousand holes intersecting one with a million holes. All the SOAP  
> and VOSI and authentication and service logs to deal with.  
> Documentation that you can read at different levels. To a data  
> provider, implementing the ADQL monolith is VERY complex and needs  
> weeks just to understand the dozen required documents.
>
> The point of the Multicone service is that you*don't* need to do  
> ADQL!  The point is that it gets 90% of what the astronomer wants  
> for 10% of the effort! And it can be made robust as well.
>
> Roy
>
> -- 
>
> California Institute of Technology
> 626 395 3670

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