(Originally posted by @Benjamin Spead on June 25, 2014)

This code snippet generates a list of Ensemble Lookup Tables and Schema documents in the user's current namespace. Run the code by running the class method "test":


Class benspead.EnsTablesSchema
{
    classmethod test() {
        If ##class(%Dictionary.CompiledClass).%ExistsId("Ens.Util.LookupTableDocument") {
            // only supported in Ensemble 2012.1+
            Write !,!,"Exporting Ensemble Lookup Tables..."
            Set sc = $$$OK
            Set rs = ##class(%ResultSet).%New("Ens.Util.LookupTableDocument:List")
            Do rs.Execute()
            While rs.Next() {
                Set item=rs.Data("name")
                Write "document found: "_ item,!
            }
            Do rs.Close()
            Set rs=""
        }
        If ##class(%Dictionary.CompiledClass).%ExistsId("EnsLib.HL7.SchemaDocument") {
            Write !,!,"Exporting Ensemble HL7 Schemas..."
            Set sc = $$$OK
            Set rs = ##class(%ResultSet).%New("EnsLib.HL7.SchemaDocument:List")
            Do rs.Execute()
            While rs.Next() {
                Set item=rs.Data("name")
                Continue:$listfind($lb("2.1.HL7","2.2.HL7","2.3.HL7","2.4.HL7","2.5.HL7","2.6.HL7","2.7.HL7","2.3.1.HL7","2.5.1.HL7","2.7.1.HL7","ITK.HL7")
                                    ,item)
                Write "document found: "_ item,!
            }
            Do rs.Close()
            Set rs=""
        }
    }
}

Here's a link to the code on GitHub: https://github.com/intersystems-community/code-snippets/blob/master/src/...

Last comment 2 days ago
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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.

Last comment 4 days ago
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Astronomers’ tools

5 years ago, on December 19, 2013, the ESA launched an orbital telescope called Gaia. Learn more about the Gaia mission on the official website of the European Space Agency or in the article by Vitaly Egorov (Billion pixels for a billion stars).

However, few people know what technology the agency chose for storing and processing the data collected by Gaia. Two years before the launch, in 2011, the developers were considering a number of candidates (see “Astrostatistics and Data Mining” by Luis Manuel Sarro, Laurent Eyer, William O’Mullane, Joris De Ridder, pp. 111-112):

Comparing the technologies side-by-side produced the following results (source):

TechnologyTime
DB213min55s
PostgreSQL 814min50s
PostgreSQL 96min50s
Hadoop3min37s
Cassandra3min37s
Caché2min25s

The first four will probably sound familiar even to schoolchildren. But what is Caché XEP?

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I bet that not everyone familiar with InterSystems Caché knows about Studio extensions for working with the source code. You can actually use the Studio to create your own type of source code, compile it into interpretable (INT) and object code, and sometimes even add code completion support. That is, theoretically, you can make the Studio support any programming language that will be executed by the DBMS just as well as Caché ObjectScript. In this article, I will give you a simple example of writing programs in Caché Studio using a language that resembles JavaScript. If you are interested, please read along.

Last comment 2 December 2018
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There are several options how to deliver user interface(UI) for DeepSee BI solutions. The most common approaches are:

  • use native DeepSee Dashboards, get web UI in Zen and deliver it in your web apps.

  • use DeepSee REST API, get and build your own UI widgets and dashboards.

The 1st approach is good because of the possibility to build BI dashboards without coding relatively fast, but you are limited with preset widgets library which is expandable but with a lot of development efforts.

The 2nd provides you the way to use any comprehensive js framework (D3, Highcharts, etc) to visualize your DeepSee data, but you need to code widgets and dashboards on your own.

Today I want to tell you about yet another approach which combines both listed above and provides Angular based web UI for DeepSee Dashboards -  DeepSee Web library.

Last comment 25 November 2018
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Everybody has a testing environment.

Some people are lucky enough to have a totally separate environment to run production in.

-- Unknown

.

In this series of articles, I'd like to present and discuss several possible approaches toward software development with InterSystems technologies and GitLab. I will cover such topics as:

  • Git 101
  • Git flow (development process)
  • GitLab installation
  • GitLab WorkFlow
  • GitLab CI/CD
  • CI/CD with containers

This first part deals with the cornerstone of modern software development - Git version control system and various Git flows.

Last comment 22 November 2018
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The data model of your solution based on InterSystems platforms constantly changes over time. But what do you do with the data that was entered before? Back then, the data was valid, but what’s happening to it now after a number of data model changes? The answer to this question can be provided by the IDP DV tool that checks the property data of persistent and serial classes according to the types of these properties. In case any discrepancies are found, the tool generates a detailed error report for the user.

Last comment 16 November 2018
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InterSystems states that Caché supports at least three data models – relational, object and hierarchical (globals). On can work with data presented in relational model in a program written on C# the same way one works with any other relational DB. To work with data presented by object model in C# one needs to use .NET Managed Provider or some kind or ORM. And starting with version 2012.2 one can work directly with globals (or use direct access to hierarchical data) via Caché eXTreme for .NET

Last comment 13 November 2018
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