#Caché

This is the first article in a series discussing how to regain disk space from Caché databases at the operating system level. This introductory article discusses Caché database growth and gives an overview of various methods you can use to return unused disk space that is allocated to database files back to the file system. But before we talk about returning space to the file system, let’s first review how does it get allocated in the first place.

Beginning in Caché 2013.1, InterSystems introduced Outlier Selectivity to improve query plan selection involving fields with one atypical value.

In this article, I hope to use an example 'Projects' table to demonstrate what Outlier Selectivity is, how it helps SQL performance and a few considerations for writing queries.

Hi,

I have a problem which i think has a simple solution but which i and others haven't yet cracked. I want to display text output to a text box in monospaced font. At the moment the style sheet is shown below, I have tried various other options such as specifying a specific font such as Courier New. None of the browsers I have tried (Safari, Firefox on OSX, IE) display as monospace, although the last 2 come close. I wonder whether I need a <pre> tag, but I can't see how to do that in Zen.

Suggestions?

Hello!

The question I have today is the next. Suppose I have this simple class describing the REST application:

Here's an easy one for you; before I spend another hour looking for the answer, how do you convert %ArrayOfDataTypes to an array (that could, say, fit into the %session.Data array, or maybe just some array named info()), and of course back again?

NS>s aodt=##class(%ArrayOfDataTypes).%New()

NS>w aodt.SetAt("lcavanaugh","username")
1
NS>w aodt.SetAt("organization","coolcompany")
1
NS>w ##class(%ArrayOfDataTypes).BuildValueArray(aodt,.array)

<LIST>zBuildValueArray+1^%Library.ArrayOfDataTypes.1

Hi All,
when I ran the Command to make a folder in particular directory its not working in terminal,but when i run the same command in studio output block it create the folder.
Used command:
S cmd="mkdir E:\DIRECTORY"
O cmd:"QR":10
Suggest Please.

Hi-

I have created a class that extends %Persistent and %Populate and have set the various POPSPEC attributes of my properties to control how the properties are populated. However, when I compile the class and try to run the Populate() method it tells me the method isnt defined.

Here is the class definition:

I try to run the cmd command in the studio terminal, but i am getting the <NOTOPEN> Error.

Even ZF(-1) also not working. Any help, Please!!!

Note: i restart the Cache instance service with full privilege

Code:

Set Path="mkdir E:\Sample\New"

Open Path:"QR":10

Error:<NOTOPEN>

This command working on my PC, but on server throws error.

Many Thanks

Can somebody explain this behaviour of Cache (and many other calculating machine as well) :

WRITE 1/3*12

4

WRITE 1/3*5

1.666666666666666667

W 1/3*18

5.999999999999999999

W 1/3*21

6.999999999999999999

W 1/3*24

7.999999999999999999

How can we make more occurate caculations in Cache ?

There is an interesting discussion in the Russian forum going.

What is the best solution for the function which returns the max for the set of parameters?

From the listed solutions I like this one:

ClassMethod max(args...) {
  for i=1:1:args {  s max(+$g(args(i))) = i }
  s i="", max=$o(max(i),-1, i) Q $lb(max, i)
}

Hi,

I am using OAuth2 Cache framework, acting as a client to an authorization server. My setup is based on this excellent previous post [Caché Open Authorization Framework (OAuth 2.0) implementation – part 1].

I'm facing ‘Authorization Server Error: Error Processing Response - No match between server name 'googleapis.com' and SSL certificate values google.com…’

It looks like I should set SSLCheckServerIdentity to false but I can’t figure out how. Has anyone had the same issue?

Has anyone ever used the LogoutAll method in the %CSP.Session class successfully? I'm wondering what I need to do to use it.

Thanks,

Laura

I have a client who is in the process of developing some tests (short routine) to perform on a large data set – possibly several hundred million records – and is looking for an efficient way to spread the workload across his CPU’s to speed up the execution time. Any suggestions or tips I can pass on?​

Absolutely investigate the Work Queue Manager: