dynamic query

[Ricardo Wagner Martins]

Hi all,

How can I do a dynamic statement in a CLASS-object
in the map-file?
There seem to be only static values possible in use
with EXPRESSION like this one:

LAYER
  NAME cities # the CGI-relation

  ...

  CLASSITEM  'population' #something like this

  CLASS
   EXPRESSION ([POPULATION] > 10000)
     ....
   COLOR #e.g. red
  END

  CLASS
     EXPRESSION ([POPULATION > 50000)
     ...
     COLOR # e.g. dark red
  END
END

I wanted to use dynamic (CGI-input) values
instead of fixed values. How can I do it
here or is this just the wrong way to solve
a problem of dynamic input? Any help is
welcome and appreciated.

Ricardo Martins
PROCERGS
BRAZIL
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