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#Caché

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

Documentation.

Sometimes global mapping of the same globals can be defined in different ways. E.g., I need to define it for 3 globals ^qAuditC, ^qAuditLog, ^qAuditLogC from the same database named APP-NOJOURN. Which approach should be better from the performance point of view?

1) qAudit* => APP-NOJOURN (one record in global mapping table)
or

2) qAuditC => APP-NOJOURN
qAuditLog => APP-NOJOURN
qAuditLogC => APP-NOJOURN (three records in global mapping table)

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Question
· Aug 16, 2018
%UnitTest.TestCase

I need to start doing unit testing for some of my code.

Why does it delete the unit testing class from Cache when I run the test?

Is there a way to turn this off?

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InterSystems Data Platform includes utilities and tools for system monitoring and alerting, however System Administrators new to solutions built on the InterSystems Data Platform (a.k.a Caché) need to know where to start and what to configure.

This guide shows the path to a minimum monitoring and alerting solution using references from online documentation and developer community posts to show you how to enable and configure the following;

  1. Caché Monitor: Scans the console log and sends emails alerts.

  2. System Monitor: Monitors system status and resources, generating notifications (alerts and warnings) based on fixed parameters and also tracks overall system health.

  3. Health Monitor: Samples key system and user-defined metrics and compares them to user-configurable parameters and established normal values, generating notifications when samples exceed applicable or learned thresholds.

  4. History Monitor: Maintains a historical database of performance and system usage metrics.

  5. pButtons: Operating system and Caché metrics collection scheduled daily.

Remember this guide is a minimum configuration, the included tools are flexible and extensible so more functionality is available when needed. This guide skips through the documentation to get you up and going. You will need to dive deeper into the documentation to get the most out of the monitoring tools, in the meantime, think of this as a set of cheat sheets to get up and running.

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Question
· Mar 10, 2019
Try Cachè on Ubuntu

Hello.

There is a way to install and try Cachè 2018.1 on Ubuntu 16.04 distribuition or it's necessary use Red Hat/Suse distribuition to try Cachè on Linux?

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Question
· Mar 9, 2019
%SYS.TasK Related query

Hi Community,

I have to make a daily task (Job) which will run (7 am to 7 pm) in a day at an interval of 3 hours. Timings are as (7:00 am, 10:00 am,13:00 pm,16:00 pm,19:00 pm). But at each time when task will run i have to set a variables as per below condition

Sample:

1) If task run at 2019-03-19 07:00 am in morning

I have to set two variables (start and end) whose value will become like this

(set starttime= 2019-03-09 07:00:00.00 and set endtime=2019-03-09 10:00:00.00)

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Hi community,

I have a rights problem when giving a user permission to perform some select queries on particular tables. So I have created a user with the following rights.

So this all works well. No problem so far. But the customer is using a program where you can easily build visually the query by selecting the table, choose the right colums etc. So the problem we have is when I give the user the Role %All the tables are shown.

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I have a cache client trying to call a web service using SOAP version 1.2. We receive a SOAP error with the following text:

COD>w ##class(DBMS.Tools).DecomposeError(%objlasterror)

ERROR #6248: SOAP response is a SOAP fault: <Fault><Code><Value>s:Sender</Value>

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Hi Community!

There are two general ways to execute arbitrary SQL in serverside ObjectScript code: EmbeddedSQL and ObjectScript SQL a.k.a. Dynamic SQL.

E.g. if we want to get the value of the property of instance with a certain ID using SQL we can do:

&sql(SELECT Name INTO :name FROM Sample.Person WHERE ID=1)

write name

Same result with %SQL.Statement:

set rs=##class(%SQL.Statement).%ExecDirect(,"SELECT Name as name FROM Sample.Person where ID=1")
  do rs.%Next()
  write rs.name

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Let's imagine you have only SQL. You need some table where you should increment value in some property when you update this line.

We have the table

CREATE TABLE "test" (
  "identifier"   VARCHAR(200) NOT NULL,
  "value"        INTEGER,
  PRIMARY KEY ("identifier")
)

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Question
· Mar 5, 2019
.INT file not generated

After compilation of routine .int file is not generated and toggle breakpoint is also not visible for that routine.
It is showing error #5001 Editing of INT file is not allowed. How can I resolve this ?

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Question
· Mar 5, 2019
PrimaryKey vs Idkey

Just wondering an Insight in the difference between these two indexes

IdKey / PrimaryKey
=================

Property Identifier As %Integer

Index Index1 on Identifier [Idkey]

Index Index2 on Identifier [PrimaryKey]

What's the difference?

1. If I don't have Index1 and only have Index2, then cache does still make its own id.
So how and why do I ever use the PrimaryKey. In Joins ??

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Question
· Mar 2, 2019
Parent/Child Vs One/Many

Hi

Just curious to know about the pros and cons of Parent/Child Vs One/Many.

We do use a bit of both.
One big reason we use Parent child is we feel if we delete one global, it gets rid of all child data too and all parent child data is stored in one global. Much easier to manage.

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Article
· Mar 2, 2019 6m read
Belated - Advent of Code 2018 Day 1

I know it's late, but I really love the advent of code theme each year to find some project ideas to go out and code something and push myself.

I had the intentions of completing the AOC 2018 before the new year, but I've got 2 young kids (1yo and 4yo), so most nights I just want to sleep.

I've been looking at this on my half hourly commute each day before and after work.

So whilst doing this, I found not many people had posted what they had done and in previous years.

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I have one abstract class and several subclasses. All share one data/id global.

How can I get concrete class name from id (without opening the object)?

What I have so far:

write $p($lg(^DATAGLOBAL(<id>),1),"~",*-1)

It does the job, but is there a more official way?

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Here's a simple indirection snippet. It fails with <UNDEFINED> error and I'm not sure why.

ClassMethod ind()
{
  kill info

  set active = 1
  set reactive = 2

  for i="active","reactive" {
    set info(i)= @i
  }

  zw info

  break
}

I'm getting this exception: <UNDEFINED>zind+5^test.Client.1 *active

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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
  • Continuous Delivery
  • GitLab installation and configuration
  • GitLab CI/CD

In the previous article, we covered Git basics, why a high-level understanding of Git concepts is important for modern software development, and how Git can be used to develop software. Still, our focus was on the implementation part of software development, but this part presents:

  • GitLab Workflow - a complete software life cycle process - from idea to user feedback
  • Continuous Delivery - software engineering approach in which teams produce software in short cycles, ensuring that the software can be reliably released at any time. It aims at building, testing, and releasing software faster and more frequently.

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I'm connecting to a remote device using TCP. It has a binary protocol.

set host = ""
set port = ""
set io = $io
set device = "|TCP|7000"

set timeout = 2
open device:(host:port:"M")
use device:(/IOT="RAW")
read string:timeout

use io
zzdump string

The problem is when reading from it, I get a 0A (also known as 10 or \n or linefeed) byte, which terminates the read.

Expected output:

0000: 42 00 7B 0A 11

But I get this output:

0000: 42 00 7B

How can I fix that?

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I have an existing table, and I've added an array property to it that I need to populate.
The issue is that I can only use SQL to insert into the table due to access reasons.

For example:

Class Package.Tables.Person Extends %Persistent
{
Property Name As %String(MAXLEN = "");

Property Address As Array of Package.Datatypes.Address;
}

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