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#Caché

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InterSystems Caché is a multi-model DBMS and application server. See more details here.

Documentation.

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:

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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

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Question
· Nov 3, 2016
Simple Arithmetics

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 ?

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A group of students at the Chalmers University of Technology (Gothenburg, Sweden) tried different approaches to automatically rating the quality of emergency calls, including iKnow.

Excerpt: "The most impressive results produced by iKnow is its ability to correctly classify 100% of the calls using the Average algorithm. This is quite surprising since iKnow only compares low-level concepts, how words relates to each other."

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Question
· Oct 31, 2016
Zen Excel Report

Hello Everyone.

Sorry if it is a dumb question, but I'm new.

First: I have to create a Excel MultipleSheet Report. That I'm fine with doing.. but they want me to give every Workbook that is created it's unique reportName, that is generated with the user input on the page. Is it possible to do so?

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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?

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This post is meant to provide a quick possible explanation for a very perplexing problem.

Scenario: You’ve just created your own administrative user in your 2014.1 (or later) instance of Caché. You gave it every possible security role (including %All), so it should in theory be able to do anything within the instance.

You’ve written a very advanced routine with a break command in it for debugging:

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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:

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  1. Don’t use Python built into Mac. Because of System Integrity Protection (SIP) you will not be able to access the libraries that the InterSystems Python binding requires. The Python build into the MAC has baked in what libraries it can use.
  2. Install another Python. Don’t put this other ahead of Mac Python on path since this could break things. Apple regards its Python as part of the its OS, and may use that Python in its system operations.
  3. This Python will not be installed into the protected area.
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Article
· Nov 1, 2016 9m read
Reflection in Caché

The topic of reflection hasn't been raised in Caché forums or blogs too often. Perhaps, it happened because the notion of reflection is not explicitly defined in Caché. However, it exists in Caché and can be a very useful development tool.

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Question
· Nov 1, 2016
Cache Studio - Find in Files

Hi,

In Cache Studio under the View/Find in Files. Anyone knows how to search multiple words in the string? For example,

In my routines 1, it has "Patient Name Test Name Provider Address Status " and

In my routine 2 , it has "Patient Name Test Name Provider Address "

In my routines 3, it has "Patient Name Address "

When I search, I want to search all the routines, it has the words Provider and Status which I want it returns only routine 1 because it has both words "Provider and Status". Thank you very much for your help.

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hi,

1. Created a class(test) and added a classmethod(checkdata).

2. Assigned a object with xml.

3. Created a new class for response and initialized in classmethod(checkdata).

4. Created a new class for request parsing with list of object parameter.

5. While parsing xml in request for list of object, the result count is "0". But the xml has value for "2" object list.

6. XML has follow:

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NewBie's Corner Session 22 Parameters Part III

Welcome to NewBie's Corner, a weekly or biweekly post covering basic Caché Material.

Parameters

In Sessions’ 20 and 21 on Parameters we saw how to call one routine from another with parameters as well as calling one Label from another with parameters. In these examples, the data was passed through the parameters from the calling routine or label to the called routine or label.

Now suppose you wanted the called routine or label to pass data back?

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We are finally planning to migrate some ancient Caché applications that are run on Caché 5.0.21 to a new server with Caché 2016.2.0 or so.

I wonder if we could use Shadowing between those to keep the data on the new server up to date?

We would copy the Caché backup from the old environment to the new and do a RESTORE there and then start shadowing.

I know than 5.0.21 is no more officially supported by ISC.

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After reading Stephen Wilson's article "Windows 7 performs shutdown too fast for Cache to close and so it gets forced down" I've recalled another solution that was based on Local Group Policy, which allows to control extra actions that should occur on computer startup or shutdown. How to add a computer shutdown script is well documented in MS Technet article.

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Hi All,

I have a general query in regards to developers experience on extracting data from cache databases and the most efficient way to do so. I work with a number of clients who have applications with cache databases and require the data off the host system and onto data warehouse platforms for research and analysis. Often they require the data in source state which means the extracts are often simply a table scan of the entire database table without any aggregation or manipulation.

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