We are attempting to "Repoint" old class data to new class data to save disk space and data redundancy across multiple tables. This works to a point.  In essence the two classes are sharing the same data / Index / stream globals.  But if an ID in the Old_Class is opened, a property is modified, and saved the property that is in the New_Class (but not in the Old_Class) is NULLed / blanked.

Simplified explanation of data and what’s occurring.

Hello,

First of all thanks for your time reading our question, and thanks for your replies and help

We would need to know if a patient has less than 65 years old, using their birthday from the PID 7.1

So far we have developed the following code:

Hi communauty

I've two columns in my table and the type must be interval of integer values for example : age must be interval between [2 and 6] years and wigth between [10 and 30 ] Kg , how can i define them when creating my table?

thank's

Hi all,

I've created a method to calculate the age of a person, or the age of a process, contract or other stuff as you want.

Hello Team,

in C++ program with #include iris-callin.h..  The program terminateswhen it tries to execute IRISSECURESTARTA with exit code -1073741515.

const char *username="user", *password="xyz",*exename="Test_Callin";

int termflag = IRIS_PROGMODE|IRIS_TTNONE|IRIS_TTNEVER;

Note: the %Service_Callin setting is Enabled.

Hello everyone,

My team lead mentioned that users can sometimes create globals directly without associating them with tables or classes. In this case, these globals would not be accessible via SQL.

Is this correct? Can a global exist independently in this way, and if so, is there a specific approach to access or manage them without SQL?

I've modified the class file, but messages still arrive as a single line (e.g., "H|.../rQ|.../rL") instead of separate lines in the ASTM service. The <ENQ>..<EOT> header looks correct, logs show no errors, and the service receives messages fine. Is there an Ensemble 2018.1 engine setting (like line terminator handling or TCP framing) to fix the line splitting? ​

Hello Community,

I am facing a JDBC connection issue after migrating from Caché 2016 to Caché 2018.1. When I attempt to connect using the following connection settings:

CACHE_DATASOURCE_URL=jdbc:Cache://localhost:1972/TEST

CACHE_DB_USERNAME=test

CACHE_DB_PASSWORD=test
 

I consistently receive the following error:

[Cache JDBC] Communication link failure: Access Denied

This configuration worked perfectly with Caché 2016. I have verified the following:

Where can I download the Cache ODBC drivers?

Where can I download the Cache ODBC drivers for Windows?

I need to connect to a cache database by odbc but the FPTs that I have found do not work, 
could you tell me where to download the ODBC drivers

I like to install Cache Evaluation version for learning purpose. Could you please share the download link to install it? I appreciate any help you all provide. Thanks. 

We are hiring!  100% Remote W2 Contract | 3-6+ Months (numerous extensions likely)

Two Roles:
🔹InterSystems Engineer
🔹Epic Bridges Certified/InterSystems Engineer  

Having solid experience with the below: 

Hello,

We are accessing an InterSystems Cacha database from Microsoft SQL Server using a linked server over ODBC (ODBC35). Queries are executed using OPENQUERY.

On the SQL Server side, there is a linked server property called Query Timeout. By default it is set to 0 (no timeout). We are considering setting it to 15 seconds and would like to understand how Cache behaves in this scenario.

Specifically, I would like clarification on the following points:

Hello. Here is  XDataReportDefinition

Hello
How to hide a table completely in pdf generation when a row is empty?
A table has style with borders
<table group="services" removeEmpty="1" style="border:1px solid black;">
     <item field="TotalSum" suppressEmpty="1" />

     <item field="TotalAvSum" suppressEmpty="1" />
 </table>
With removeEmpty="1" and  suppressEmpty="1"  all data are hidden when a row is empty but top and bottom borders are remain on the page.
How to hide also table's top and bottom borders when a data row is empty?

I have a Photo that is stored as an VARBINARY within MS SQL. I would like to Select the data into a EnsLib.SQL.Snapshot, is that possible? I would take it out of the Snapshot and send it to a %Stream so it can be written out to a file.

Motivation

I didn't know about ObjectScript until I started my new job. Objectscript isn't actually a young programming language. Compared to C++, Java and Python, the community isn't as active, but we're keen to make this place more vibrant, aren't we?

I've noticed that some of my colleagues are finding it tricky to get their heads around the class relationships in these huge projects. There aren't any easy-to-use modern class diagram tool for ObjectScript.

Related Work

I have tried relavant works:

You probably know this situation:
Some time ago, you found a very special $ZU function for a very specific type of problem. Some kind of mystical formula. It became popular and was used by many developers throughout your code and across all your installations.

Several versions and updates later, you are informed by ISC that your mystical $ZU is deprecated and no longer supported. You are advised to replace it with a new $something().

You send an HTTP request and get back an HTTP error but with an HTML error page which you didn't expect... what's happening?... 🤔

Specifically for example, perhaps you tried to READ a FHIR Resource (e.g. /Patient/123) and you get back a 404 error page, even though with other Patient IDs, you get back the Resource payload, so "the page" definitely does exist... why should you be getting a 404 error page? 🙄

Hello!!!

Data migration often sounds like a simple "move data from A to B task" until you actually do it. In reality, it is a complex process that blends planning, validation, testing, and technical precision.

Over several projects where I handled data migration into a HIS which runs on IRIS (TrakCare), I realized that success comes from a mix of discipline and automation.

Here are a few points which I want to highlight.

1. Start with a Defined Data Format.

Before you even open your first file, make sure everyone, especially data providers, clearly understands the exact data format you expect. Defining templates early avoids unnecessary bank-and-forth and rework later. 

While Excel or CSV formats are common, I personally feel using a tab-delimited text file (.txt) for data upload is best. It's lightweight, consistent, and avoids issues with commas inside text fields. 

PatID   DOB Gender  AdmDate
10001   2000-01-02  M   2025-10-01
10002   1998-01-05  F   2025-10-05
10005   1980-08-23  M   2025-10-15

Make sure that the date formats given in the file is correct and constant throughout the file because all these files are usually converted from an Excel file and an Basic excel user might make mistakes while giving you the date formats wrong. Wrong date formats can irritate you while converting into horolog.

The Power of Indexing in Database Tables

When working with databases, most developers understand the concept of an index and why it's used: to speed up data retrieval. But the real impact of indexing often becomes clear only when you compare scenarios with and without it.

Do you Know what Happens Without an Index?
Imagine a table with three columns: Name, Age, and MobileNumber.

Now, consider this query:

If the Age column does not have an index, the database engine will:

Hi,

I have Cache 2024.1.  I attached the process ID from my terminal to the Cache Studio for Debugger.  When I click on  "Call Stack" tab I only see first 500 shown.  Anyone know how to extend so I can see the rest of the information when i click on "Call Stack" tab?  Thank you very much.

Second question:  Using Cache Studio Debugger, anyone know how to expand the value of this variable when it display F,...

InterSystems FAQ rubric

If you try to kill a global that is mapped at the subscript level from the top node, you will get a <SLMSPAN> error and it will not be deleted. This is because the kill command for subscript-level mapped globals cannot be used across mappings.

// Suppose subscript-mapped globals exist in different databases, as shown below:^TEST(A*～K*) -> database A
^TEST(L*～Z*) -> database B

// Trying to kill from the top level will result in a <SLMSPAN> error.
NAMESPACE>Kill^TEST
<SLMSPAN> <- This error is output.

Hello all,

First time post and newer to Cache/ObjectScript in general, please keep it in mind! 

I am getting the following error periodically:

CP: Pausing users because the Write Daemon has not shown

InterSystems FAQ rubric

Too run SQL in Terminal use $system.SQL.Shell().

Please refer to the sample below.

In some cases, it's necessary to manipulate data from one namespace to another. For example, a routine in the "N1" namespace needs data from the "N2" namespace. In legacy systems (using only globals), it's common to make the global universal, but what about persistent classes? Is this type of globalization also possible?

Recently, we implemented some Java-based services using JDBC. And some time ago, I refactored some legacy PHP programs that used "csession" for communication between systems to use PDO with ODBC.

This raised a question for me about how license management is done in this scenario.
Is a license used per pool? Or per connection? How is this management done?

Introduction and Motivation

A unit of ObjectScript code (a ClassMethod, say) may produce a variety of unexpected side effects by interacting with parts of the system outside of its own scope and not properly cleaning up. As a non-exhaustive list, these include:

• Transactions
• Locks
• I/O devices
• SQL cursors
• System flags and settings
• $Namespace
• Temporary files

When using standard SQL or the object layer in InterSystems IRIS, metadata consistency is usually maintained through built-in validation and type enforcement. However, legacy systems that bypass these layers—directly accessing globals—can introduce subtle and serious inconsistencies.