· Mar 20, 2017
AWS API calls

This question is about calling AWS REST APIs. Based on:

AWS requires REST clients to call their APIs using Signature Version 4 which in case you don't know what I am talking about is a pain in the neck. Here comes the question:

Has anybody, by any chance implemented the v4 signing alg. in COS? If yes, would she or he have the kind heart to share?



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InterSystems FAQ rubric

In the sample below, an image file is encoded into a Base64 string in a class property, saved, decoded again with Base64, and restored to another file.

【Usage class】

Class User.test Extends %Persistent
Property pics As %GlobalBinaryStream;

【When importing】

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Developing a Full-Stack JavaScript web app with Caché requires you to bring together the right building blocks. In the previous part, we created a basic front-end React application. In the second part of this article series I will show how to choose the right back-end technology for your application. You will see Caché allows you to use many different approaches to link your front-end to your Caché server, depending on your application's needs. In this part we will set up a back-end with Node.js/QEWD and CSP/REST. In the next part we will enhance our basic web app and connect it to Caché using these technologies.

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We are retiring a hosted application for an electronic health care records (EHR) system which stored the data on Cache for UNIX (Red Hat Enterprise Linux for x86-64) 2017.2.2 (Build 867_4_20245) Thu Oct 8 2020 16:58:40 EDT. The hosting company is providing me with a single CBK file. I need to install a database system to restore the database and provide occasional SQL access for reports when necessary. I'll need to maintain access to the data for an approximately 10 year retention period. Not sure how to approach restoring this old of a database and eventually upgrading it to a newer re

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· Oct 4, 2023
Project development

Need your company a help developing projects on Intersystems Caché / Iris plataform?

I'm a senior developer, more of 30 years experience in ObjectScript, working as a freelancer for specific projects.

I'm a Spanish citizen, actually located part time in Barcelona Spain, and part time in Phuket Thailand, my work is always 100% remote.

For more information can email:


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I need to ensure that the task created/scheduled, by system user, is created in the routine database and not remotely in the ECP to which it is connected. How can I guarantee the creation/scheduling of this task?

Here is a suggestion for creating the routine in both environments:

Is there another option?

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· Sep 28, 2023
Dynamic Rendered Connections


I'm trying to configure a specific process which dynamically sends messages to different endpoints based on datalookup keys, I've configured this aspect. What I'd like is to be able to visually see these connections without hardcoding them so is there a way to dynamically link them, i'll share what I tried below.


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InterSystems FAQ rubric

The meaning of each timeout value is as follows.

1. [Server response timeout]

If IRIS/Caché processing (routine or query execution) does not finish within this set time, the browser will return an error.

For example, if this value is 60 seconds and it takes 90 seconds to execute a routine/method/query, an error will occur.

2. [Queued request timeout]

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Hello InterSystems Community Members,

I hope you are all doing well. I am currently facing an issue while trying to set up the SNMP subagent functionality for my InterSystems Cache installation.

I am using InterSystems Cache for Windows (AMD64) version 5.2.4 (Build 809_0_9006U). The SNMP subagent functionality requires the iscsnmp.dll dynamic library, which I have been unable to locate in my installation directory.

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InterSystems FAQ rubric

It can be retrieved using the schema INFORMATION_SCHEMA.

INFORMATION_SCHEMA is a system schema and is not displayed by default in the SQL menu of the Management Portal.

The method to display it is as follows.

  1. Open Management Portal → System Explorer → SQL menu.
  2. Check "System" on the left of the schema drop-down.
  3. Select INFORMATION_SCHEMA from the schema dropdown.

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Currently, the SQL privileges (SELECT, INSERT, UPDATE, DELETE) are managed at the tables level, which can be very tedious when you have to administer many roles in an organization, and need to keep them sync with a constantly evolving data models.
By managing privileges at the schemas level, will allow to give SELECT and other DML privileges to *all* or *several schemas* to a role|user, fixing the need to manually synchronize the new tables|views to the roles.

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InterSystems Official
· Aug 17, 2023
InterSystems Supported Platforms Update Q3-2023

We often get questions about recent and upcoming changes to the list of platforms and frameworks that are supported by the InterSystems IRIS data platform. This update aims to share recent changes as well as our best current knowledge on upcoming changes, but predicting the future is tricky business and this shouldn’t be considered a committed roadmap.

With that said, on to the update…

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Hello Everyone,

We currently have CSP application that runs under 2 servers(usually primary), and every month the server reboots for patching SERVER1(primary) in the morning and SERVER2(backup) at night.

Whenever the SERVER1 reboots SERVER2 behaves as primary and when SERVER1 comes back up it will act as backup server.

First Patching:

So, when SERVER1 is down, I need to start httpd service for SERVER2 and stop httpd service for SERVER1 (which is now backup server).

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Hi all,
I am trying to execute a query like the below code.
set statement = ##class(%ResultSet).%New("some_class:query_method"). // here query method is empty and with rowspec some columname


I want to fetch data type of column value returned from above. eg - Name - VARCHAR, amount - INTEGER etc.
How can I get it. Or if not possible directly. Is there any other way to validate or get datatype of values returned. Line we have type() in python3

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· Aug 31, 2023
SELECT command within CSP

The program below works perfectly when I call it directly from the Terminal, however when I call it from within a CSP it does not work (It does not do the SELECT).

In the USER namespace, the program works both in the Terminal and on the CSP , but in another namespace it only works when called directly in the Terminal.

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