Overview
Performs an xquery on repository and returns the results as string array.Array<string> $XmlRepository.Query(xquery: string, parameters: object)
Arguments
string xquery
Specifies the query to perform on the database.
object parameters
Specifies the binding parameters on xquery string.
Remarks
If query does not return any result than return value is empty array.
The examples below shows how to query the domain database.
The syntax of the query is quite detailed. More information can be found on xquery standard page. ,
Example
Find all customers
var results = $XmlRepository.Query('//Customer');
$Xml.InnerXml( 'Customer', results.join() );
Example
Find customer by id
var results = $XmlRepository.Query('//Customer[Id=$id]', {
id : $Xml.Evaluate('CustomerId')
});
$Xml.InnerXml( 'Customers', results.join() );
Example
Query Update
$XmlRepository.Query('for $customer in //Customer[Id=$id] return replace value of node $customer/Name with "Lady Gaga"', {
id : $Xml.Evaluate('CustomerId')
});
Example
Query Insert
$XmlRepository.Query('insert node (<Kaynak><Id>{$newId}</Id><Ad>{$newName}</Ad></Kaynak>) as last into /KVKEnvanter/Tanimlar/Kaynaklar', {
newId: newId,
newName: name.trim()
});
Example
Query Delete
$XmlRepository.Query('let $nodeValue := fn:parse-xml-fragment($nodeValue)' +
'for $record in Relation[Id=$id]/RepHistory/RepHistoryRecord[InstanceId=$instanceId] return ' +
'(delete node $record)', {
id : relationId,
instanceId : $Xml.Evaluate('SelectedHistory/Id'),
nodeValue : $Xml.SelectSingle('.').InnerXml()
});
If you want to query the database of a process, you can use the collection keyword. You have to give the name of the database which is a GUID. For process databases, you can have that GUID by $Instance.ProcessId.
Example
Querying process database
var results = $XmlRepository.Query('collection("49551ed3-6229-408a-aaaa-eb510463acad")//Customer[Id=$id]', {
id : $Xml.Evaluate('CustomerId')
});
$Xml.InnerXml( 'Customers', results[0].Evaluate('Id') );
See Also
- $XmlRepository.QueryXml
- XML+Database