Mapserver 6.2 concatenate attributes in FILTER

Question

Back in version 5.0 I had:

FILTER ("<tcode:expression/>" eq '[STATE][COUNTY]') 
final version = FILTER ("11000" eq '[STATE][COUNTY]')

so I would filter out the features with state = 11 and county = 000

Now, in 6.2, it does not work anymore. Does anyone know how to make it work with concatenated attributes?

I know that it would work like this:

FILTER ("11" eq '[STATE]' and "000" eq '[COUNTY]')

but it would really help me to find a way for the concatenation to work like:

FILTER ("11000" eq ('[STATE]'.'[COUNTY]')) -no error, but not display anything

Been browsing the documentation for a while but I just can't make this work.

Answer 1

According to http://mapserver.org/mapfile/expressions.html#string-operations-that-return-a-string, “String1” + “String2’ returns “String1String2”.