second times sql and SUM function in Map script

[Milo van der Linden]

Hello Murat!

What I would do (as I always do when queries get complex) is create a
view in the mysql database and call that view. That will speed up
performance and give you less chance of error in your mapfile.

So in MySQL:

CREATE OR REPLACE VIEW MyVIEW as
SELECT
d_damage as damage,
m_village1.name as villagename,
m_village1.latitude as latitude,
m_village1.longitude as longitude,
sum(d_damage.deadp_rc + d_damage.deadp_wood + d_damage.deadp_briq +
d_damage.deadp_brick + d_damage.deadp_stone + d_damage.deadp_adobe) as
totaldamage
from
    d_damage,
    m_village1
where
d_damage.region_id=m_village1.dist_id

And in the MapFile;
select latitude, longitude, totaldamage from myVIEW where d_damage.eq_id
like "%eq_id%" and m_village1.name not like "%(%"


This will make life less complicated, plus you can test the query better
in mySQL!


Murat Beyhan schreef:
> Dear Friends,
>
> I would like to draw a casualty distribution map for  various building
> types.
>
> On the srcSQL as you see  I need summation of the casualties of each
> type of buildings(rc,wood,briq,brick,stone,adobe)
> So I have used sum function to obtain total number of casualties. But
> when I tried to make legend I have to select classitem so I have used
> AS totald for that reason
> then I have used totald as a classitem.
> But mapserver returns an error message.
>
> When I select only one item for select query for example select
> d_damage.deadp_wood from d_damage
> then If I use deadp_wood as classitem the query works and the map drawn.
>
> For my intend what I have to do?
> Regards...
> MURAT
>
> script: as follows
>
>
> LAYER
> NAME "Dhuman"
>   CONNECTIONTYPE OGR    CONNECTION '<OGRVRTDataSource>
>   <OGRVRTLayer name="Dhuman">
> <SrcDataSource>MYSQL:turkey,user=root,password=mysql_123,host=localhost,port=3306,tables=d_damage
> m_village1</SrcDataSource>
>       <SrcSQL>SELECT m_village1.latitude,m_village1.longitude,
> *sum(d_damage.deadp_rc + d_damage.deadp_wood + d_damage.deadp_briq +
> d_damage.deadp_brick + d_damage.deadp_stone + d_damage.deadp_adobe) as
> totald *from d_damage, m_village1 where d_damage.eq_id like "%eq_id%"
> and d_damage.region_id=m_village1.dist_id and m_village1.name not like
> "%(%"</SrcSQL>
>       <GeometryType>wkbPoint</GeometryType>
>       <GeometryField encoding="PointFromColumns" x="longitude"
> y="latitude"/>
>   </OGRVRTLayer>
> </OGRVRTDataSource>'
>  TYPE POINT
>   DATA Dhuman
>   STATUS default
>           CLASSITEM "totald"
>   CLASS
>   NAME "HUMAN DAMAGE"
>   EXPRESSION ([totald] < 0)
> #    COLOR 255 0 255
> #    SYMBOL "cpoint"
> #    SIZE 12
> END
>
>
>
>   CLASS
>   NAME "1-10"
>   EXPRESSION ([totald] GE 1.0 AND [totald] LT 10.0)
>  SYMBOL "cpoint"
>  SIZE 5
>   COLOR 255 250 250
> END
>
>   CLASS
>   NAME "11-50"
>   EXPRESSION ([totald] GE 11.0 AND [totald] LT 50.0)
>  SYMBOL "cpoint"
>  SIZE 5
>   COLOR 248 248 255
> END
>
> CLASS
>   NAME "51-100"
>   EXPRESSION ([totald] GE 51.0 AND [totald] LT 100.0)
>  SYMBOL "cpoint"
>  SIZE 5
>   COLOR 255 250 240
> END
> CLASS
>   NAME "101-200"
>   EXPRESSION ([totald] GE 101.0 AND [totald] LT 200.0)
>  SYMBOL "cpoint"
>  SIZE 5
>   COLOR 102 255 204
> END
> CLASS
>   NAME "201-400"
> EXPRESSION ([totald] GE 201.0 AND [totald] LT 400.0)
>   SYMBOL "cpoint"
>   SIZE 5
>   COLOR 102 53 0
> END
> CLASS
>   NAME "400<"
>    EXPRESSION ([totald] GT 400.0)
>   SYMBOL "cpoint"
>   SIZE 5
>   COLOR 102 153 255
> END
> END
>
>
>
> the error message as follows:
>
> msDrawMap(): Image handling error. Failed to draw layer named 'Dhuman'.
> msOGRFileOpen(): OGR error. Open failed for OGR connection `
> MYSQL:turkey,user=root,password=mysql_123,host=localhost,port=3306,tables=d_damage
> m_village1 SELECT m_village1.latitude,m_village1.longitude,
> sum(d_damage.deadp_rc+ d_damage.deadp_wood +d_damage.deadp_briq +
> d_damage.deadp_brick + d_damage.deadp_stone + d_damage.deadp_adobe) as
> totald from d_damage, m_village1 where d_damage.eq_id like
> "200006060242-auto-000" and d_damage.region_id=m_village1.dist_id and
> m_village1.name not like "%(%" wkbPoint '. SQL statement failed, or
> returned no layer result: SELECT
> m_village1.latitude,m_village1.longitude, sum(d_damage.deadp_rc+
> d_damage.deadp_wood +d_damage.deadp_briq + d_damage.deadp_brick +
> d_damage.deadp_stone + d_damage.deadp_adobe) as totald from d_damage,
> m_village1 where d_damage.eq_id like "200006060242-auto-000" and
> d_damage.region_id=m_village1.dist_id and m_village1.name not like "%(%"
>
>


-- 


	

Milo van der Linden
skype: milovanderlinden <skype:milovanderlinden?add>
mlinden at zeelandnet.nl <mailto:mlinden at zeelandnet.nl>
milovanderlinden at gmail.com <mailto:milovanderlinden at gmail.com>
milo at 3dsite.nl <mailto:milo at 3dsite.nl>
http://www.3dsite.nl

	  	

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