I have a query string that I am creating programmatically, based on some user inputs.  The user might search on 5 fields, or 8 fields, or no fields.

In my sql statment, some of these fields require parameters in the %Execute statement.

For example:

if user picks lastname, sql = "select * from person where lastname = ?"

if user also picks age, sql = "select * from person where lastname=? and age > ?"

I then have these lines of code to create my result set:

set statement = %SQL.Statement

statement.%Prepare

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Hi Community!

Sometimes I meet a method which accepts 10+ parameters.

And often I need only the 8th parameter  to  pass. And I call the method something like:

do ##class(Some.Feature).Method(,,,,,,,"flag")

And I don't like this method when I call it like this cause, you know, often I just miss the number of commas and raise some other flag I wanted.

How do you avoid this situations? 

If you meet such a code, how do you call it and sure that you didn't miss the number of ","?

What is a good number of parameters in a method and f you need to pass more parameters in a method what do you do?

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Hi Developers!

In March we are starting our first InterSystems IRIS Programming Contest! It's a competition in creating open-source solutions using InterSystems IRIS Data Platform.

The topic for the first contest is InterSystems IRIS, Docker and ObjectScript!

The contest will last three weeks: March 9-31, 2020

 Prizes:

There will be money prizes for Experts Nomination - winners will be determined by a specially selected jury:

🥇 1st place - $2,000 

🥈 2nd place - $1,000 

🥉 3rd place - $500

Also, there will be Community Nomination - an application that will receive the most votes in total:

🏆 1st place - $1,000

And we provide winners with high-level badges on Global Masters.

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4 27 1,467

Hi, folks!

Suppose you have a Caché class with %String property which contains relatively large text (from 10 to 2000 symbols).

The class:

Class Test.Duplicates Extends %Persistent 

{

Property Text As %String (MAXLEN = 2000);

}

And you have thousands of entries.

What are the best options to find entries which are duplicates on this property?

00
1 26 889

The dataCombo property columnHeaders is a comma-delimited list of column headers displayed in the dropdown list.

Comma is a delimiter.

But, if I want add comma to columh header, for instance "House number, apartment" - this is value for header of one column.

How can I escape comma in this case?

"House number\, apartment" - is not working. 

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Discussion
John Murray · Mar 3, 2016
Anyone using Visual Studio Code?

Is anyone in the fine community of developers who work with ISC technologies looking at Microsoft's Visual Studio Code offering?

One of Bill McCormick's recent posts about Atelier referred to Visual Studio being considered the best IDE. Granted, Code is far less of a tool than VS, and probably always will be. But it claims to be open source and cross-platform, i.e. Linux and OS X as well as Windows.

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3 26 4,413

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?

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1 25 2,127

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?

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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.

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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.

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0 24 856
Question
wx fg · Jul 18, 2017
how to release memory for process?

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?

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0 24 550

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?

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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.

150
10 24 1,679

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
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4 23 4,123

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 REST.  

150
3 23 3,827

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

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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.

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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 3rd 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.)
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1 23 1,120

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?

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