Jose Sabike Raja · Dec 15, 2017
cache operator

In if condition what is the difference between specifying the single operator and double operator? For example, what is the  difference between (&& and &) or (|| and !)

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I am trying to read an xml document using %XML.TextReader and that's is all well and l can get my elements values  but would like to determine where the next record start on the xml without referring to the document path in essence would like to use the same method to read different xml docs. I would like to know if is there a way or a function that I can use to get the start and end of a record in xml  as I would to get the start and end element.

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Hi all,

I have a database with 140 million records containing financial transactions. When I do a query to calculate the sum of those records spanning a number of months it takes around 4 seconds on my database server which seems reasonable. However if I run the same query on an application server it takes around 40 seconds to do the same query.

In just this instance I would like to run that piece of code on the database server instead of the application server. It's a query that is only run a few times a day so I would prefer to have a fast result and don't mind putting a bit more stress on my database server for that.

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Today %SYS.Namespace.ListAll started to report one namespace, for example USER, two times: once as "USER" and once as USER's database "^^c:\databases\user".

Details: my Cache instance has  50+ local namespaces. Today I have "touched" 3 of them (imported new classes), and now ListAll reports each of these 3 twice. Looks like ListAll is the only one who sees those strange duplicates, in all other places (Portal, Studio) only USER is shown.

Can someone explain what is happening?

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Recently viewed a demo on the new Dynamic Objects in InterSystems (we are still running 2016.1); together with the upcoming IRIS data platform I started thinking about possibilities of building dynamic databases. That is, I can imagine some projects were it might be really nice to store dynamic objects and then run sql queries on them without ever defining the fields of the dynamic objects (i.e. not at storage, but only if you run your sql query).

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Soufiane Amroun · Dec 5, 2017
Client description Oauth2

Hi community ,

i come back to you , i've a problem with Client description in Oauth2, when i tick the  Supported grant types and i save , there are not registred on the OAuth2_Client.Metadata table .

can you tell me where is the problem please.

you will find attached a screenshot.


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Sankar Manogaran · Dec 13, 2017
Cyclic Redudancy Error


We are using Cache 5.0.15 version. We are facing error. I tried to copy the dat file, I am getting cyclic redudancy error.
I did run the integrity check and repair utility . Nothing works.
Now My question is how to recover the dat file with data.

Thanks in Advance!

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Hello Community,

I recently encountered a issue with Caché and I can't figure out where the problem is coming from.

I noticed that the license limit (200)  was reached whenever I was opening my Studio (so it seems). When this occurs, I restart Caché (with the Cube in the Taskbar), and the number of license used is back to 1%, but grows back after.  The time taken before the number of license  grows back again looks pretty random.

Here is a couple of screenshots :

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Eduard Lebedyuk · Dec 7, 2017 3m read
Asynchronous REST

In this article I'd like to discuss asynchronous REST and approaches to implementing it.

Why do we need asynchronous REST? Simply put - answering the request takes too much time. While most requests usually can be satisfied immediately, some can't. The reasons are varied:

  • You need to perform time-consuming calculations
  • Performing action actually takes time (for example container creation)
  • etc.

The solution to these problems is asynchronous REST. Asynchronous REST works by separating request and real response. Here's an example, let's consider the following simple async REST broker:

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Denis Zaripov · Dec 10, 2017
Cache and Database

Hi, I'm a student, weak programming. I ask for your help, I write a program in C #, there are two tables, but I do not understand how to organize the connection between them many to many. Table in DataGridView1 from DataSet1 on Form1 key connection in DataGridView1 from DataSet1 to Form3

I do this on Form1

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Has anyone tried adding syntax highlighting to GitHub for Caché CLS files?

Looking at the list of supported languages and extensions...

It looks like Mumps is supported, and there is also an existing language with a .cls extension, which would account for why I see some very odd highlighting going on with some of my code.

There is a page on contributing a new language here...

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Nael Nasereldeen · Dec 10, 2017


I'm trying to use the IN operator in SQL.

does not work, can anyone tell me why that could be?

for example:

SELECT * FROM TafnitCore_Logistics_TransferPackage_DB.PackageData  WHERE ID IN ('1||1||9852553062' , '1||1||9852553061' ) ORDER BY Building


And I get the following error:

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Ponnumani Gurusamy · Dec 9, 2017 1m read
Simple Game Code(21 sticks Game)
    w "Total No.Of Sticks:21"_!
    s sticks=21
    r "enter machine name: ",a
    r "enter dev name: ",b
    w "Display 1 to 21 sticks"_!
    s i=""
    f i=1:1:21{
        w " "_i_" "
    w !_"User select 1 or 2 or 3 or 4 sticks:"_!
    r "User enter sticks: ",us
    if us>4 {
        w "please select upto 4 Sticks"
        r "User enter sticks: ",us
    s cnt=sticks-us
    s sticks=cnt
    f i=1:1:sticks {
        w " "_i_" "
    s dev=1
    s machine=0
    d:sticks=0 lost(dev,machine)
    d machine(.sticks,us)
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I am trying to age based on a given date and current date here is my code:

Property DOB As %Date
Method GetAge() As %Integer
   if (..DOB="")
  set today=0 
  set today=$ZDate($HOROLOG,2)-$ZDate(..DOB)
  write "Today's==="_$ZDate($HOROLOG),!
  write today
  return today

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First-class functionwiki

In computer science, a programming language is said to have first-class functions if it treats functions as first-class citizens. This means the language supports passing functions as arguments to other functions, returning them as the values from other functions, and assigning them to variables or storing them in data structures. Some programming language theorists require support for anonymous functions (function literals) as well. In languages with first-class functions, the names of functions do not have any special status; they are treated like ordinary variables with a function type.

This post continues the article “Declarative development in Caché”.

[2357111317].forEach(function(i) {

How to do something like this in Caché using COS?

Below are some exercises on this topic.

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