[mapserver-users] expressions in a chart layer

[Mario Basa]

Hello.

Do EXPRESSIONS work in a chart layer? I have been trying something
like the one below, and the postgis layer only has 2010 and 2011 data
and yet the 2012 portion of the chart keeps on appearing. If
Expressions do not work, is there any other method of filtering the
data before creating the pie char.    Thanks!


TYPE CHART
PROCESSING "CHART_SIZE=20"
PROCESSING "CHART_TYPE=PIE"

CLASS
        NAME "2010"
        EXPRESSION ([obj_yyyy]=2010)
        STYLE
            SIZE 5
            COLOR 234 192 156
            OUTLINECOLOR 10 10 10
        END
    END
    CLASS
        NAME "2011"
        EXPRESSION ([obj_yyyy]=2011)
        STYLE
            SIZE 20
            COLOR 112 78 221
            OUTLINECOLOR 10 10 10
        END
    END
    CLASS
        NAME "2012"
        EXPRESSION ([obj_yyyy]=2012)
        STYLE
            SIZE 60
            COLOR 133 178 199
            OUTLINECOLOR 10 10 10
        END
    END