TAP-1.1 columns.column_index info
Mark Taylor
m.b.taylor at bristol.ac.uk
Fri Jan 12 16:03:21 CET 2018
On Fri, 12 Jan 2018, Marco Molinaro wrote:
> Dear DAL/Apps-ers,
> in updating the TASMAN TAP_SCHEMA manager application,
> on the way to let the app user decide the column ordering
> (i.e. filling up the TAP_SCHEMA.columns.column_index values)
> we are going the following way: let the user define ordering on
> the important/preferred columns while leaving "unordered" the
> other columns.
>
> That is: we may have a bunch of NULLs alongside integers as the
> column_index values.
>
> TAP-1.1 latest revision is not preventing this.
> My only question is: will applications be OK with this?
Fine by me.
> The intent is to have the NULL-annotated-column_index
> columns fall (potentially) unordered after the ordered
> ones when rendered into the client.
That's what TOPCAT will do in that case
(at least I believe so, I'm not sure it's actually been tested).
--
Mark Taylor Astronomical Programmer Physics, Bristol University, UK
m.b.taylor at bris.ac.uk +44-117-9288776 http://www.star.bris.ac.uk/~mbt/
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