Query For Xquery Implementation of Date Function

Question

Hi All,
Objective: In array Item, I have to check for device entry Dates.
First device entry date would be the date corresponding to device seq no =0
Latest entry date would be the date corresponding to max device seq no.
Diff date should be differnce between first entry date and latest entry dates in days.
Output should be like
<FirstEntrydate></FirstEntrydate>
<LatestEntryDate></LatestEntryDate>
<Diffdate></Diffdate>
<Maxdevice Seq no></MaxdeviceSeqno>
the XML to transform is :
<?xml version="1.0"?>
<ns0:contractDeviceHistory xmlns:ns0="http://www.lhsgroup.com/ws_v3">
<ns0:item>
*<ns0:deviceEntryDate>*
*<ns0:date>2015-01-09T09:30:22</ns0:date>*
*</ns0:deviceEntryDate>*
<ns0:deviceId>3</ns0:deviceId>
<ns0:deviceModDate>
<ns0:date>2013-01-21T09:30:22</ns0:date>
</ns0:deviceModDate>
<ns0:devicePort>devicePort_1</ns0:devicePort>
*<ns0:deviceSeqno>2</ns0:deviceSeqno>*
<ns0:deviceSmNum>deviceSmNum_1</ns0:deviceSmNum>
<ns0:deviceStatus>deviceStatus_1</ns0:deviceStatus>
<ns0:deviceUserLastMod>deviceUserLastMod_1</ns0:deviceUserLastMod>
<ns0:deviceValidFrom>
<ns0:date>2013-01-06T09:30:22</ns0:date>
</ns0:deviceValidFrom>
<ns0:hlcode>32</ns0:hlcode>
<ns0:hlcodePub>hlcodePub_1</ns0:hlcodePub>
<ns0:reason>64</ns0:reason>
</ns0:item>
<ns0:item>
*<ns0:deviceEntryDate>*
*<ns0:date>2014-01-09T09:30:22</ns0:date>*
*</ns0:deviceEntryDate>*
<ns0:deviceId>3</ns0:deviceId>
<ns0:deviceModDate>
<ns0:date>2013-01-21T09:30:22</ns0:date>
</ns0:deviceModDate>
<ns0:devicePort>devicePort_1</ns0:devicePort>
*<ns0:deviceSeqno>1</ns0:deviceSeqno>*
<ns0:deviceSmNum>deviceSmNum_1</ns0:deviceSmNum>
<ns0:deviceStatus>deviceStatus_1</ns0:deviceStatus>
<ns0:deviceUserLastMod>deviceUserLastMod_1</ns0:deviceUserLastMod>
<ns0:deviceValidFrom>
<ns0:date>2013-01-06T09:30:22</ns0:date>
</ns0:deviceValidFrom>
<ns0:hlcode>32</ns0:hlcode>
<ns0:hlcodePub>hlcodePub_1</ns0:hlcodePub>
<ns0:reason>64</ns0:reason>
</ns0:item>
<ns0:item>
*<ns0:deviceEntryDate>*
*<ns0:date>2012-01-09T09:30:22</ns0:date>*
*</ns0:deviceEntryDate>*
<ns0:deviceId>3</ns0:deviceId>
<ns0:deviceModDate>
<ns0:date>2012-01-21T09:30:22</ns0:date>
</ns0:deviceModDate>
<ns0:devicePort>devicePort_1</ns0:devicePort>
*<ns0:deviceSeqno>0.0</ns0:deviceSeqno>*
<ns0:deviceSmNum>deviceSmNum_1</ns0:deviceSmNum>
<ns0:deviceStatus>deviceStatus_1</ns0:deviceStatus>
<ns0:deviceUserLastMod>deviceUserLastMod_1</ns0:deviceUserLastMod>
<ns0:deviceValidFrom>
<ns0:date>2013-01-06T09:30:22</ns0:date>
</ns0:deviceValidFrom>
<ns0:hlcode>32</ns0:hlcode>
<ns0:hlcodePub>hlcodePub_1</ns0:hlcodePub>
<ns0:reason>64</ns0:reason>
</ns0:item>
</ns0:contractDeviceHistory>
The Incomplete Xquery i wrote is this, which is not working. Plz suggest
declare function xf:SIMReplacementInfoResBSCSToSiebel($contractDeviceHistory1 as element())
as element(ns0:SIMReplacementResponse) {
<ns0:SIMReplacementResponse>
<ns0:SIMReplacement>
for $item in $contractDeviceHistory1/ns1:item
group $item as $group by
               $item/ns1:deviceSeqno as $key1,
                    $item/ns1:deviceEntryDate/ns1:date as $key2
               order by $key1 descending
return
<ns0:SIMReplacement
MaxDeviceSeqNo= "{ fn:max($key1) }"
FirstEntry_date = "{if(($key1) = '0.0')then($key2) else (0)}"
LatestEntry_date="{if(($key1)= fn:max($key1))then($key2) else ($key2)}"
/> }
<ns0:Status>Success</ns0:Status>
</ns0:SIMReplacement>
</ns0:SIMReplacementResponse>
declare variable $contractDeviceHistory1 as element() external;
xf:SIMReplacementInfoResBSCSToSiebel($contractDeviceHistory1)
Regards
Manu
India.

Answer 1

Post Author: jsiegmund
CA Forum: Data Connectivity and SQL
Not really, that function is a start, but to calculate the true ammount of work days there are a lot more variables to take into account. For instance, easter depends on the easter sunday which isn't a fixed date. In one year it may be in may, in the next it's in april. So defining a list of holidays (as done in the function in your example) isn't going to cut it. Therefore I mentioned implementing the function in Crystal Reports is a hard job which I wouldn't gladly take on. In the meantime, I've come upon an other solution using SQL Server 2005. It's possible to use assembly's in SQL Server, so I compiled the function as an assembly and loaded that into SQL Server. I needed information from the database for my reports anyway, so now I'm able to do the calculations in the views in the database, instead of leaving that to Crystal. Somewhat of a different solution, but it works for now. It would be great if future versions of Crystal would support the loading of assembly files though