Could anyone please explain why Caché has a %STARTSWITH function while it supports ANSI SQL "LIKE"?

thank you very much.

Hello,

So i want to use the INSERT OR UPDATE command so i can update a COUNTER for a given name:

INSERT OR UPDATE myTable
SET name='Omer',  counter = counter + 1;

as you can see with the above code - if the row is non-existent then we get an error because COUNTER is NULL!

I'm aware of two ways to get list of files in a dir:

set dir = "C:\temp\"
set rs = ##class(%File).FileSetFunc(dir, , , 1)
do rs.%Display()

and:

set dir = "C:\temp\"
set file=$ZSEARCH(dir_"*")
while file'="" {
   write !,file
   set file=$ZSEARCH("")
}

Yet they bot return only files and directories in a current directory, but not files in subdirectories.

I suppose I call one of these recursively, but maybe there's a better solution?

I am experimenting with Relationships, both Parent to Child and One to Many.

I have done some SQL look-ups and have searched through the documentation, however not in a lot detail, but wonder if there are more and better ways to access both sides of Relationships through SQL?

Thank you in advance for any help provided.

We've been tasked with developing a file upload module as part of our wider system, storing scanned documents against a patients profile. Our Intersystems manager suggested storing those files in the DB as streams would be the best approach and it sounded like a solid idea, it can be encrypted, complex indexes, optimized for large files and so on. However the stake holder questioned why would we want to do that over storing them in windows folders and that putting it in the DB was nuts. So we were wondering what everyone else has done in this situation and what made them take that route. 

I am working with a client to try and export a set of tasks defined in the Task Manager from one system to another.  I am not seeing any API for this.  I can query this information in SQL.  So I tried to use the Data Export Wizard from the System Management portal in the SQL window.  Export was fine.  Importing failed with a "can't insert into read only field" error.  Looking at the class definition does not help since the implementation details are not visible.

So how would one accomplish this?  Export scheduled tasks from one system to another?

I have multiple projects that I utilize when debugging in Cache Studio. One of my projects suddenly lost the ability to step through commands with the yellow box and the cursor moving though code lines. The cursor just sits at the entry line while variables apparently do change. Interestingly enough, if I change the project and the debug target, the "yellow box" ability is still there. Apparently losing this functionality is by project/debug target/whatever. The goal is, of course to return it back but how?
P.S.

On the back of my recent post on writing bug-less code I wanted to raise a few suggestions (to ISC) that would help prevent certain types of bugs at compile time. I've probably missed a few, but these are the main ones in my mind. Please contribute more suggestions.

Btw, these also serve as potential gotchas for new COS developers.

I except that introducing these types of changes can cause legacy code problems. Particularly where developers do some interesting overloading of method arguments.

GraphQL is a standard for declaring data structures and methods of data access that serves as a middleware layer between the client and the server. If you’ve never heard about GraphQL, here is a couple of useful online resources: here, here and here.

In this article, I will tell you how you can use GraphQL in your projects based on InterSystems technologies.

hi

  I query large mount of rows from one table with JDBC, and will prompt <store> error.  I found that it was out of process memory (default 16M, max 49M in version 2010.2) .

  so my question is : how to release memory for large  mount of rows  query? or how to resolve this error?

Hi, everyone!

I want to share a personal project that started with a simple request at work: 

Is it's possible to know how many Caché licenses we are using? 

Reading other articles here in the community, I found this excellent article by  David Loveluck 

APM - Using the Caché History Monitor
https://community.intersystems.com/post/apm-using-cach%C3%A9-history-monitor

So, using David's article, I started using Caché History Monitor and to show all that information. 

When facing the question: Which cool tech should I use?

A few people wrote to me asking about the infrastructure behind the Atelier Server implementation. Its neat and a worthwhile story to share so I am writing it up here as a post on the community. I want to go in to a little detail on why it was needed and then I will outline in detail how we went about implementing this.

So why did we need to give people a “server in the cloud”? Atelier is the new IDE for InterSystems products. It is Eclipse based and implemented in Java so it is cross platform. The communication between the Atelier client and the server is REST based over http.

The Interoperability user interface now includes modernized user experiences for the DTL Editor and Production Configuration applications that are available for opt-in in all interoperability products. You can switch between the modernized and standard views. All other Interoperability screens remain in the Standard user interface. Please note that changes are limited to these two applications and we identify below the functionality that is currently available. 

To try out the new screens prior to upgrading, you can download the 2025.

Hi,

I exported selected globals from a Cache 2017 database into a single 4 Gb gof file. Now I tried to import from this file via Management Portal on a different machine . Only about half of the globals was imported and my attempts to select additional globals led to nothing, no new globals have been imported. Well, obviously I am mildly curious what's going on and how can I see the corresponding error which did not appear in the Import window but I can also shrug it off and consider what should I do next.

So, one day you're working away at WidgetsDirect, the leading supplier of widget and widget accessories, when your boss asks you to develop the new customer facing portal to allow the client base to access the next generation of Widgets..... and he wants you to use Angular 1.x to read into the department's Caché server.   

There's only one problem:  You've never used Angular, and don't know how to make it talk to Caché.

This guide is going to walk through the process of setting up a full Angular stack which communicates with a Caché backend using JSON over

Hi,

I have  a program that displays the current running processes to the screen. I need to have a program execute that display program and capture the results to a file. The display program does pause at the bottom of each page waiting for an 'enter' to go to the next page.

Note( the display program will not successfully compile on the current system but it does work)

Also - very, very new to Mumps. 

Thanks,

Bob

This is the second part of my long post about package managers in operating systems and language distributions. Now, hopefully, we have managed to convince you that convenient package manager and rich 3^rd party code repository is one key factor in establishing of a vibrant and fast growing ecosystem. (Another possible reason for ecosystem success is the consistent language design, but it will be topic for another day.)

In this second part we plan to discuss the practical aspects of creating a package manager in general and their projection to the Caché database environment.

In this article I would like to present the RESTForms project - generic REST API backend for modern web applications.

The idea behind the project is simple -after I wrote several REST APIs I realized that generally, REST API consists of two parts:

• Work with persistent classes
• Custom business logic

And, while you'll have to write your own custom business logic, RESTForms provides all things related to working with persistent classes right out of the box.
Use cases

• You already have a data model in Caché and you want to expose some (or all) of the information in a form of REST API
• You are developing a new Caché application and you want to provide a REST API

Just like the title says, I'm attempting to find a way to create a web application that instead of serving CSP files, it uses a dispatch class.
I searched for clues in the documentation, but the CSPApplication tag seems to be exclusively for CSP file-based applications.
I'm trying to avoid implementing a workaround such as using the Invoke tag to call the Security.Applications to generate the web application but I might be forced to do so, even though it's unpleasant if I had to say...
So, is there an official way to execute this task?

I have a CSP page that is supposed to show some user info (Full name and some other properties retrieved from AD)

I am unable to get them outside of %SYS namespace using Security.Users class. Is there another mechanism to do that, or I am using Security.Users class incorrectly?

Hi, Community!

Please share your experience on code deployment on production site. Do you compile ObjectScript on Production? Is it OK? 

Or you only compile on Test site and copy cache.dat to a Production?

Hi everybody,

Is there a way to run code on another machine? Of course, all authentication info is known. I know only about RemoteResultSet but that seems to be query specific.

Thanks in advance,
Anna
P.S. The ultimate goal, in case that matters, is to create identical globals on 2 different machines with one run.

Let's have a round of CodeGolf!

As usual the goal is to write the shortest solution for a specified problem.

Today we have one of the classics: FizzBuzz.

Write a program that prints the numbers from 1 to 100.

But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”.

For numbers which are multiples of both three and five print “FizzBuzz”

The topic of for/while loop performance in Caché ObjectScript came up in discussion recently, and I'd like to share some thoughts/best practices with the rest of the community. While this is a basic topic in itself, it's easy to overlook the performance implications of otherwise-reasonable approaches. In short, loops iterating over $ListBuild lists with $ListNext or over a local array with $Order are the fastest options.

As a motivating example, we will consider looping over the pieces of a comma-delimited string.

Hi!

Want to share with you code snippet of try catch block I usually use in methods which should return %Status. 

{ 
 try {
  	$$$TOE(sc,StatusMethod())
 }
 catch e {
 	set sc=e.AsStatus()
 	do e.Log()
 }

Quit sc 
}

Here $$$TOE is a short form of $$$TROWONERROR macro.

Inside macro StatusMethod is any method you call which will return %Status value. This value will be placed into sc variable.

In case of sc contains error execution will be routed to try catch block. You can wrap any Status methods calls in your code if you need to catch the errors coming from them.

I have a class (to be deployed) and I want to forbid anyone from extending it.

Is there any way to do that?

My new question regards connecting to the external database to insert the data. I have the following code:

#include %occInclude
// winsurge6
// insert winsurge data into cancer registry database
// Create new Gateway connection object
set gc=##class(%SQLGatewayConnection).%New()
If gc=$$$NULLOREF quit $$$ERROR($$$GeneralError,"Cannot create %SQLGatewayConnection.")
//Make connection to target DSN
s pDSN="CGDEV"
s usr="WINSURGE_DMP"
s pwd="xxxxxxxx"
s sc=gc.Connect(pDSN,usr,pwd,0)
If $$$ISERR(sc) quit sc
if gc.

I have classes A and B, B derived from A, A has method Abc.

From INT of class B I see that compiler copies implementation of Abc to class B, so that Abc exists both in A and B.

As result, when B invokes Abs, B.Abs() is executed instead of A.Abs(). In result debuger is not able to step into Abs and breakpoints in A.Abs never hit.

Why this happens and how can I avoid this?

Update:

OK, now I know the reason: compiler makes the copy if Abc has this line:

s cn=##Expression($$$quote(%classname))

hmmmm.