Chameleon SQLquery Widget
fend0009
fend0009 at UMN.EDU
Sun Apr 29 07:13:14 PDT 2007
Hi list:
I am using a sqlquery widget to build a report on employment change in a
mapping application. Having little experience in PostgreSQL and Chameleon, I
managed to upload a shapefile (empchgfinal.shp) to PostgreSQL database,
created a spatial index (gist type, name "emp") for the shapefile and wrote
the following SQL query in the html file. However, when I selected the area
of interest (using ROIManager widget), I can see the area is highlighted, but
when I click on generate report, I got an empty result. 1) What is
sharedresourcename in the SQL Query and Table widgets for and how should it
be specified in the table widget? ("EMP" is a report type out of 4 link
options in the report.html and "emp" is the name for the spatial index in the
shapefile). 2) Is there some thing I should do extra in PostgresSQL so that
this will work? Could someone please give me some guidance as to how I can
fix this? Any suggestions will be highly appreciated. Thanks!
Sincerely,
Jessica Fendos
<!-- Query for Employment Report -->
<cwc2 type="SQLQuery" server="XXXXX" database="XXX" username="postgres"
password="mapsXXX" dbtype="PGSQL"
sqlquery="select sum(e.aest_00) as avgest00,sum(e.aest_05) as
avgest05,sum(e.e_est) as estchange,
round(sum(e.e_est)/sum(e.aest_00)*100, 1) as p_estchg,
sum(e.aemp_00) as avgemp00,sum(e.aemp_05) as avgemp05,
sum(e.e_change) as empchange,
round(sum(e.e_change)/sum(e.aemp_00)*100, 1)
as p_empchange,count(*) as n_blockgroups from empchg_final e where
e.the_geom && SetSRID('BOX3D([$_MinX_$] [$_MinY_$] , [$_MaxX_$]
[$_MaxY_$])'::box3d,-1) AND within (e.the_geom, SetSRID
('BOX3D([$_MinX_$] [$_MinY_$],[$_MaxX_$][$_MaxY_$])'::box3d,-1));"
sharedresourcename="EMP">
<ONEVENT Event="ConnectFailed" Text="Connection failed."/>
</cwc2>
<!-- Table for Employment Report -->
<cwc2 type="Table" sharedresourcename="EMP" >
<template name="header"><![CDATA[
<TABLE BORDER=1 CELLSPACING=1 CELLPADDING=1 WIDTH=600>
]]></template>
<template name="body"><![CDATA[
<TR HEIGHT=16 >
<TD WIDTH=52% ALIGN=LEFT > <BR></TD>
<TD WIDTH=12% ALIGN=RIGHT ><FONT style=FONT-SIZE:10pt FACE="Arial"
COLOR=#000000>2000#</P></TD>
<TD WIDTH=12% ALIGN=RIGHT ><FONT style=FONT-SIZE:10pt FACE="Arial"
COLOR=#000000>2005#</P></TD>
<TD WIDTH=12% ALIGN=RIGHT BGCOLOR="#dddddd"><I><FONT style=FONT-SIZE:10pt
FACE="Arial" COLOR=#000000>Change</P></I></TD>
<TD WIDTH=12% ALIGN=RIGHT BGCOLOR="#dddddd"><I><FONT style=FONT-SIZE:10pt
FACE="Arial" COLOR=#000000>Change %</P></I></TD>
</TR>
<TR HEIGHT=18 >
<TD ALIGN=CENTER COLSPAN=5><BR><P CLASS="sub">Employment Statistics</P></TD>
</TR>
<TR HEIGHT=15>
<TD ALIGN=LEFT ><P CLASS="detail">Average Establishment</P></TD>
<TD ALIGN=RIGHT ><P CLASS="detail">%avgest00%</P></TD>
<TD ALIGN=RIGHT ><P CLASS="detail">%avgest05%</P></TD>
<TD ALIGN=RIGHT BGCOLOR="#dddddd"><P
CLASS="detail"><I>%estchange%</I></P></TD>
<TD ALIGN=RIGHT BGCOLOR="#dddddd"><P
CLASS="detail"><I>%p_estchg%</I></P></TD>
</TR>
<TR HEIGHT=15 >
<TD ALIGN=LEFT ><P CLASS="detail">Average Employment</P></TD>
<TD ALIGN=RIGHT ><P CLASS="detail">%avgemp00%</P></TD>
<TD ALIGN=RIGHT ><P CLASS="detail">%avgemp05%</P></TD>
<TD ALIGN=RIGHT BGCOLOR="#dddddd"><P
CLASS="detail"><I>%empchange%</I></P></TD>
<TD ALIGN=RIGHT BGCOLOR="#dddddd"><P
CLASS="detail"><I>%p_empchange%</I></P></TD>
</TR>
....
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