Question
Kurro Lopez · Apr 28, 2021

Query method in a class %Persistent using itself as parameters

Hi all,

I'm wondering if is possible to get the values of itself to run a query.

I want to create some query to find a value into a %Persistent class but each one use diferent values.

Class Kurro.MyClass Extends %Persistent
{

/// Key of process
Property KeyProcess As %String(MAXLEN = "");

/// Specialist
Property CodeSpecialist As %String;

/// Provider
Property CodeProvider As %String;

/// Center
Property CodeCenter As %String;

/// Date
Property Date As %TimeStamp;

/// IdList
Property IdList As %String;

/// IdProcess
Property IdProcess As %String;

/// Duration
Property Duration As %String;

Query GetInfo(pObject AS Kurro.MyClass) As %SQLQuery(CONTAINID = 1, ROWSPEC = "IdList:%String,IdProcess:%String,Duration:%String")
{
    SELECT IdList, IdProcess, Duration
    FROM Kurro.MyClass
    WHERE KeyProcess = :pObject.KeyProcess
    AND CodeSpecialist = :pObject.CodeSpecialist
    AND CodeProvider = :pObject.CodeProvider
    AND CodeCenter = :pObject.CodeCenter
    AND Date = :pObject.Date
}

}

Then I call it by this way:

set obj=##class(Kurro.MyClass).%New()
set obj.KeyProcess="1033004-1#"
set obj.CodeSpecialist = "surgery"
set obj.CodeProvider = "PR002"
set obj.CodeCenter = "CENTER-01"
set obj.Date = $ZDATETIME($ZDATETIMEH("2021-04-30 15:45:00",3,1),3,1)

set result = obj.GetInfoFunc(obj)

But I have the following error

%Message = "ERROR #5002: Error de cache: <OBJECT DISPATCH>zGetInfoFunc+5^Kurro.MyClass1 *Property 'KeyProcess' in class 'Kurro.MyClass' must be MultiDimensional "

It's weird, because this property is a simple %String param.

Then, I've tried to get itself values, and call using the same instance

Query GetInfo() As %SQLQuery(CONTAINID = 1, ROWSPEC = "IdList:%String,IdProcess:%String,Duration:%String")
{
    SELECT IdList, IdProcess, Duration
    FROM Kurro.MyClass
    WHERE KeyProcess = KeyProcess
    AND CodeSpecialist = CodeSpecialist
    AND CodeProvider = CodeProvider
    AND CodeCenter = CodeCenter
    AND Date = Date
}

and call it using

set result = obj.GetInfoFunc()

But is doesn't work

%Message = "ERROR #5002: Error de cache: <PARAMETER>zGetInfo+1^Kurro.MyClass.1"


is it possible to get the values of the object to use as parameter of the query?

Best regards,
Kurro

 

 

Product version: HealthShare 2017.2
$ZV: Cache for Windows (x86-64) 2017.2.1 (Build 801_3U) Thu Apr 12 2018 10:02:23 EDT
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Replies

is it possible to get the values of the object to use as parameter of the query?

I don't think so. SQL must work from xDBC context and objects don't exist there.

How would you call your function from Management Portal or any SQL Editor?

Perhaps pass the object ID into something like:

Query GetInfo(refId As %String) As %SQLQuery(CONTAINID = 1, ROWSPEC = "IdList:%String,IdProcess:%String,Duration:%String")
{
    SELECT list.IdList, list.IdProcess, list.Duration
    FROM Kurro.MyClass list
    JOIN Kurro.MyClass ref on ref.ID = :refId
    AND ref.KeyProcess = list.KeyProcess
    AND ref.CodeSpecialist = list.CodeSpecialist
    AND ref.CodeProvider = list.CodeProvider
    AND ref.CodeCenter = list.CodeCenter
    AND ref.Date = list.Date
}

It's a good idea, but I haven't the ID of the row.

My idea was use the object as a parameter to pass a lot of values, and the query reads these values, instead of pass one by one the params.

I've changed my query with all of the parameters that I need to run the query

Query GetInfo(pKeyProcess As %String, pCodeSpecialist As %String, pCodeProvider As %String, pCodeCenter As %String, pDate as %TimeStamp) As %SQLQuery(CONTAINID = 1, ROWSPEC = "IdList:%String,IdProcess:%String,Duration:%String")
{
    SELECT IdList, IdProcess, Duration
    FROM Kurro.MyClass
    WHERE KeyProcess = :pKeyProcess
    AND CodeSpecialist = :pCodeSpecialist
    AND CodeProvider = :pCodeProvider
    AND CodeCenter = :pCodeCenter
    AND Date = :pDate
}

It works, but I need to pass all params. I wanted to create a class to pass all parameters, like a c# method, and try to use itself.

Thanks for all mate.

¡Hola @Kurro Lopez !
It's a really interresting issue.
#2) your second example can't work by principal as you don't pass a call parameter.
#1) It is not foreseen to use object properties as host-variables in SQL
The code fails in the generated Execute method.

set tResult = tStatement.%Execute($g(pObject.KeyProcess),$g(pObject.CodeSpecialist),$g(pObject.CodeProvider),$g(pObject.CodeCenter),$g(pObject.Date))

$GET for oblect-properties is just not ​implemented. It is definded by the class and always there,
But it is required and makes sense for multidimensional properties !

This is valid for ObjectScript as such and not related to SQL.​​​​​​
But in handwritten code you can use $g(NOTHING,pObject.KeyProcess
The generator just doesn't do it. 

 

Workaround #1: directly fiddle in the generated code .  Not recommended
Workaround #2:  move your properties with a helper function into local variables
and adjust your query to those variables 

example helper (with obj or id):

ClassMethod FillProp(pObject As Kurro.MyClass) As %Boolean [ SqlName = FILLP, SqlProc ]
{
if '$isObject(pObject) set obj=##class(Kurro.MyClass).%OpenId(pObject)
else  set obj=pObject
set %Kurro("kp")=obj.KeyProcess
     ,%Kurro("sp")= obj.CodeSpecialist
     ,%Kurro("pr")= obj.CodeProvider
     ,%Kurro("cs")= obj.CodeCenter
    ,%Kurro("dt")= obj.Date
quit 1
}
example query;
Query GetInfoRcc(objid As %Integer) As %SQLQuery(CONTAINID = 0, ROWSPEC = "IdList:%String,IdProcess:%String,Duration:%String")
{
    SELECT IdList, IdProcess, Duration
    FROM Kurro.MyClass
    WHERE KeyProcess = :%Kurro("kp")
    AND CodeSpecialist = :%Kurro("sp")
    AND CodeProvider = :%Kurro("pr")
    AND CodeCenter = :%Kurro("cs")
    AND "Date" = :%Kurro("dt")
   AND FILLP(:objid) = 1
}

works as expected.

Sorry for being late. I was interrupted by ....  15 times at least with nonsense

 

You are implicitly using %Library.SqlQuery:Func() method, in which, as @Robert Cemper rightly pointed out, $get() is used.

You can do it differently:

Query GetInfo(pObject AS Kurro.MyClassAs %SQLQuery(CONTAINID 1ROWSPEC "IdList:%String,IdProcess:%String,Duration:%String") [ SqlProc ]
{
    SELECT IdListIdProcessDuration
    FROM Kurro.MyClass
    WHERE KeyProcess :pObject.KeyProcess
    AND CodeSpecialist :pObject.CodeSpecialist
    AND CodeProvider :pObject.CodeProvider
    AND CodeCenter :pObject.CodeCenter
    AND "Date" :pObject.Date
}


set obj=##class(Kurro.MyClass).%New()
set obj.KeyProcess="1033004-1#"
set obj.CodeSpecialist "surgery"
set obj.CodeProvider "PR002"
set obj.CodeCenter "CENTER-01"
set obj.Date $ZDATETIME($ZDATETIMEH("2021-04-30 15:45:00",3,1),3,1)

set st=##class(%SQL.Statement).%New()
set sc=st.%PrepareClassQuery("Kurro.MyClass","GetInfo")
  if $$$ISERR(sc{write "%PrepareClassQuery failed:" do $System.Status.DisplayError(scquit}
set result=st.%Execute(obj)
do result.%Display()

Great!!!!

The problem was calling the Query using the "func" function, calling directly it works.

good point.

Thanks for all,
Kurro Lopez