[Cartoweb-users] Mapfile Expression NULL value

[Emmanuel BELO]

Thank you Pierre,

but it doesn't work. If i find something, I'll let yo know,

regards,

eb

Pierre GIRAUD wrote:
> Don't know if this will work but have a try at :
> 
> EXPRESSION ('[tx_femme]' = 'NULL')
> 
> In the case you have several classes and the last one with no particular 
> expression to parse, try for this class :
> 
> EXPRESSION /_always_false_/
> 
> Regards
> 
> Pierre
> 
> Emmanuel BELO wrote:
> 
>> Hi,
>>
>> How do you handle NULL values from you database in your mapfile's 
>> expression?
>>
>> Example (NULL value for some tx_femme):
>>
>>  CLASS
>>     EXPRESSION (([tx_femme] > 8) AND ([tx_femme] <= 15))
>>     NAME "8 - 15"
>>     STYLE
>>       COLOR 255 217 0
>>     END
>>   END
>>
>> Doing nothing leads to this error message:
>>
>> Failure
>>
>> class:   SoapFaultWrapper
>> message:   Mapserver error: Error in msEvalExpression: Failed to parse 
>> expression
>>
>> Error in msyyparse(): syntax error
>>
>> Error in msEvalExpression: Failed to parse expression
>>
>> Error in msyyparse(): syntax error
>>
>> Error in msEvalExpression: Failed to parse expression
>>
>> Error in msyyparse(): syntax error
>>
>> Error in msEvalExpression: Failed to parse expression
>>
>> Error in msyyparse(): syntax error
>>
>> Error in msEvalExpression: Failed to parse expression
>>
>> Error in msyyparse(): syntax error
>>
>>
>>
>> Best regards,
>>
>> Emmanuel BELO
>>
>> _______________________________________________
>> Cartoweb-users mailing list
>> Cartoweb-users at lists.maptools.org
>> http://lists.maptools.org/mailman/listinfo/cartoweb-users
>>  
>>
> 
> 
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