#Caché

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

Documentation.

Article
· Mar 17, 2021 3m read
Making the most of $Query

I ran into an interesting ObjectScript use case today with a general solution that I wanted to share.

Use case:

I have a JSON array (specifically, in my case, an array of issues from Jira) that I want to aggregate over a few fields - say, category, priority, and issue type. I then want to flatten the aggregates into a simple list with the total for each of the groups. Of course, for the aggregation, it makes sense to use a local array in the form:

agg(category, priority, type) = total

Such that for each record in the input array I can just:

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Hi All,

We have a requirement for one webpage that should be access in our VPN with out authentication. If it asks user name password that also fine.

This page should be a dashboard for the ensemble health monitoring. Support Team seating Area we have big SMART Monitor which always shows this webpage. Support engineers keep on eye on this monitor, if it shows action required then . they will act upon immediately. Expecting some widgets like

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Hello,

I have an error connecting the InterSystems cache with the odbc driver with the ODBC-2017.2.2.865.0-lnxrhx64.tar version using the ubuntu versions 20.04 and version 18.04 (which works with the .Net Core 3.1 version) with the Net 6.

Error:

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Hi,

We need a web-based SQL tool to connect to Ensemble/Cache, that will offer more functionality than what the Management Portal offers.
It needs to be web based, so that we can host it on a machine that has connectivity to the server via the superserver port. We (the devs and support) only have browser access to the environment via Remote Desktops, hence the requirement.

Has anyone gotten OmniDB to connect to Ensemble/Cache? If so, can you please advise on how to configure it?

Any other suggestions for such a tool are also welcome.

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I am sure I came across this in the past with Cache and just saw this again in IRIS.

When rebuilding or swapping a DAT file for a database it retains the Resource of the DAT file, not the Resource of the Database it is being used for.

For instance, if I have a local Database called APP with a resource %DB_APP and I want to refresh the data from another Database called TEST that has a Resource %DB_TEST I can just copy the DAT file from the TEST folder to the APP folder.

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Question
· May 6, 2022
User code location

Hi

Does anyone know where the user generated code resides, the stuff one might write for a production, I presume it lives in a table somewhere within a database?

Basically, I want to do some dependency analysis of what I've written - find out what's in use, how it's referenced, etc. I know I can export it to an XML file and work on that, but direct access on a table would be quicker for me.

Cheers

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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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A question has come up that I am not finding the answer for.... Does the daily purge process re-index EnsLib.HL7.SearchTable or other SQL tables? In looking at the purge process documentation I am not seeing anything that mentions EnsLib.HL7.SearchTable. Do we have to manually constantly re-index tables that we create? For example I created another search table based off of EnsLib.HL7.Search table, will I need to constantly watch this as it grows? How do tables get index, is there some kind of mechanism that automatically does it, or are we responsible for indexing tables ourselves?

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When looking at the "Current License Usage Summary" web page, there is a line for both local and distributed "Maximum Connections". I have scrutinized every class that seems reasonable to contain this information but have found nothing that matches the values on the web page. I do not believe these are related to license specifically though I did review all of the potential attributes of the license related classes to no avail.

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Hi,

I have wrote an article about how to install the intersystems cache driver in a Docker container, and then deploy it using Azure Functions:

How to run a (Python) Azure Function as a Docker container & Deploy it using Bicep | Victor Sanner

This might be useful to others, especially the dockerfile which I have copied below. This builds a debian docker container and installs the Intersystems Cache driver, which python can then use :)

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We have a requirement to write to an AWS S3 bucket from Cache.

We haven't upgrade to IRIS yet, but are looking at doing so in the future. This requirement cannot wait for the upgrade to happen, unfortunately.

Will appreciate if any one can share any example code, that enables cache to write to an AWS S3 bucket?

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I am writing a Python tools I want to access the %Monitor.System.License properties:

  1. AvailableDist
  2. AvailableLocal
  3. MaxUsedDist
  4. MaxUsedLocal
  5. CurrentUsedDist
  6. CurrentUsedLocal

Initially I want to develop Objectscript to verify access to the properties. But I can not figure the proper syntax.

I first attempted:

set ans = ##class(%Monitor.System.License).AvailableDist

which failed.

I tried another approach:

set ans = ##CLASS(%Monitor.System.License).%GetParameter("AvailableLocal")

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Hi Team,

I am working on data transformation ADT^A01 from ADT^A01 ,In both source and target MRG segment is not available. How can i create a new MRG segment in Target. Kindly share your ideas how to create a new segment in Data transformation.

Thanks in advance

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Question
· Apr 11, 2022
MAXSTRING limit issue

MAXSTRING (longstring) is enabled.

We have a Class containing a property definition

Property SettingsJSON As %Text(MAXLEN = 3600000)

The property is used for storing a string of JSON data however in some cases we get a Cache error: %SaveData error when trying to save a string of JSON a lot less than maximum "allowed" length, any ideas anyone?

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Hello,
I'm currently working on a custom version control implementation.
I'd like to show differences between a copy of a previously saved routine as a merge of the ^ROUTINE Global and the current version of that same routine.

I've found legacy Documentation for %RCMP which does the trick in the terminal but I'd like a similar result stored inside a variable.
I also want to show differences, not only see if they are the same or not.

The management portal has that exact feature, so maybe someone can direct me to the function that is being used there.

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