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#Caché

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InterSystems Caché is a multi-model DBMS and application server. See more details here.

Documentation.

Hello everyone,

I am trying to use @() and SYSTEM() from Cache Terminal. I am searching for blinking text . I have found -5 as a Screen Display Option but not aware like how to use on terminal.
Can any one please help ?

Thanks,
Gunwant

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Hello Everyone

I use VB.NET to dev. some program for query data

Code in VB like this

Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click

AxVisM1.MServer = "CN_IPTCP:myserver[1972]"
AxVisM1.NameSpace = "LABDATA"
AxVisM1.Code = "s err="""",err=$$select^LVBEPVIS(""" & ln & """)"
AxVisM1.Execute(AxVisM1.Code)

tmptxt = AxVisM1.PLIST.ToString

messagebox.show(tmptxt)

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Hi,

I am trying to support a use case where a test instance is created from a production backup. At a high level, the process works by mounting all relevant file systems and then bringing the instance up. This works well as long as the file systems are mounted using same mount points as the source instance. However, I would like to support a case where file systems are mounted using different paths.

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Question
· Feb 9, 2023
Tracking %RCOPY and %RI

Let's supposed somebody updates routines via %RCOPY or %RI, the really old-style hardcore way which still works. Does that leave any log traces in Journaling or system globals, as of when exactly did it happen or what was the IP address of the machine changes came from? I am aware only of the Date Modified changes as seen when opening the file.

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Presenter: Anton Umnikov
Task: Identify your slowest SQL queries and tune them for better performance
Approach: Use InterSystems’ query profiling and analysis tools. Discuss how system configuration can affect performance

This session will show you how you identify the weakest link in your application SQL and introduce you to the fine art of tuning those queries. To do this we will take a look at InterSystems query profiling and analysis tools, as well as how system configuration can impact SQL performance.

Problem: Obscurity on how our SQL engine works

Content related to this session, including slides, video and additional learning content can be found here.

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Hi,

Is there a way to find the median in Intersystems Cache SQL? I know it is not available as an aggregate function. Also in SQL Server I could try something like: 

SELECT
(
 (SELECT MAX(Score) FROM
   (SELECT TOP 50 PERCENT Score FROM Posts ORDER BY Score) AS BottomHalf)
 +
 (SELECT MIN(Score) FROM
   (SELECT TOP 50 PERCENT Score FROM Posts ORDER BY Score DESC) AS TopHalf)
) / 2 AS Median

However, there is no PERCENT Keyword in Cache as well. Any suggestions?

Thanks

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Question
· Aug 24, 2021
ECP system ID

Hi,

I'm looking through some journal entries in the hope of finding the root source of an issue.
I was wondering if and how you can map a "ECP system id" to a server.

Any hints would be welcome

Best regards
Ivo

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Edit:

May have found the issue but not the solution.

"SELECT * FROM wmhISTORYdETAIL" runs as a passthrough without asking for the DNS.

but

'SELECT Count([wmhISTORYdETAIL].[HistHMNumber] AS CountOfHistHMNumber FROM [wmhISTORYdETAIL] WHERE ((([wmhISTORYdETAIL].[HistMovType])='Receipt') AND (([wmhISTORYdETAIL].[HistMovDate])>=Date()-1) AND (([wmhISTORYdETAIL].[HistMovDate])<Date()));'

asks for the DNS but both are linked to a table that has the password saved.

Any Ideas please?

Rob

Hi

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How do I write DDL script for collection properties?

For example I want to create the following class:

Class SQLUser.Person {

Property Name As %String;

Property FavoriteColors As list Of %String;

}

My DDL script looks like this:

CREATE TABLE Person (Name varchar(50), FavoriteColors ???)
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Hi,

I have two versions of Cache running on two separated servers. In one server, the version is 2018.1, and have the web application 'api/atelier', and the other server the version is 2016.1.

The question is, can I export the web application 'api/atelier' from 2018.1 and import/install it on 2016.1 version?

Thanks!

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Question
· Jan 16, 2018
Testing in studio

After creating a ClassMethod for a routing rule is it possible to test an HL7 message within Studio rather than using Management portal? It would make it easier to debug the custom function to see where the rule is failing.

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Hi,

I was understanding the cluster configuration supported by the Cache. Have couple of queries around that:

1. In Cache version 2018.2, there is a shrading concept which splits the data of a Master Data server into multiple small data server which store shraded data.

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Several $System.OBJ methods have ByRef errorlog argument:

Compile(ByRef classes As %String = "", qspec As %String = "", ByRef errorlog As %String, recurse As %Boolean = 0)

ImportDir(dir As %String = "", wildcards As %String, qspec As %String = "", ByRef errorlog As %String, recurse As %Boolean = 0, ByRef imported As %String, listonly As %Boolean, ByRef selectedlist As %String)

What's the best approach of working with errorlog?

Do you convert it to status? If so - how? Manual iteration over local?

Is there some system method to convert it into %Status?

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After installing IRIS 2023.1 on a live copy of our production machine our REST Service now consumes a CSP Session with every request. The request is handled as expected, but uses one of the 5 CSP Session per license. So after 25 requests, the license is used up. The Grace time always shows 0 and the session stay for very long. (Maybe the 900 Seconds timeout).
On Caché 2018, we had the same settings for the Webapp and there, only a single Session was set for all requests. The Caché request didn't use any cookies.

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Question
· Mar 11, 2021
DisplayToLogical

Is there any reason that property method DisplayToLogical() is not calling before object saving?

I have such situation and do not know how it is possible

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Question
· Jan 14, 2020
%CSP.Rest custom headers

I would like a REST client to be able to send a custom header with the http request, for example "APPLICATION-ID".

This can be seen in the CSP gateway trace but I have tried using %request.GetCgiEnv("HTTP_APPLICATION-ID") in various formats and parts of the classes but cannot work out where I can get this. Documentation says this should work but is for normal CSP pages.

Any ideas?

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