[MapServer-users] Is it possible to pass an attribute to PROCESSING directive?

[Trygve Aspenes]

Hi

I have a netcdf file with time dimension. This time dimension is 
expressed as bands in the to mapserver from gdal. So to get the first 
time step you would set

PROCESSING "BANDS=1" for the first timestep
PROCESSING "BANDS=2" for the second timestep etc.

However my client is passing the time variable as a ISO8601 in the 
request so I can not use run-time substitution as I can not find a way 
to translate a ISO8601 time to the BANDS processing(I have not looked 
into doing some rewrite)

I was thinking of using a postgis where I could preset a time stamp to 
the correct BANDS.

I would the set in the mapfile:

PROCESSING "[bands]"

where bands attribute comes from the select to a postgis, like

select bands from table where time="some iso8601" etc

But this does not work, and the documentation does not say it would work 
https://mapserver.org/mapfile/layer.html PROCESSING

Any ideas how I could make this work?

Trygve