#Globals

4 Followers · 232 Posts

Globals are multidimensional sparse arrays which are stored in InterSystems Data Platform. Everything in InterSystems Products is stored in Globals: Classes, Tables, Documents, Code.

Documentation.

Question Carl Deitrich · Feb 17

We are attempting to "Repoint" old class data to new class data to save disk space and data redundancy across multiple tables. This works to a point.  In essence the two classes are sharing the same data / Index / stream globals.  But if an ID in the Old_Class is opened, a property is modified, and saved the property that is in the New_Class (but not in the Old_Class) is NULLed / blanked.

Simplified explanation of data and what’s occurring.

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Question Ashok Kumar T · May 22, 2025

Hello Community,

When I run the following code with x undefined in terminal, it throws a syntax error and returns control to the program stack. After issuing a GO command, execution continues, and setting the global variable ^zz1.

code 1:

test.mac
if $Data(@x@(a,b,c)) {
    set ^zz1=1212
}
write !,1212,!
//
//or
if $Data(@x@(a,b,c)) set ^zz1=1212
write !,1212,!

 if I assign the result of $D(@x@(a,b,c)) to a local variable like d using set d=$D(@x@(a,b,c)), and then use if d { ... }, the code fails(global is not set) working as expected.

Code 2

test
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Question Ashok Kumar T · Apr 11, 2025

Hello Community,

The subroutine ^routine is not executed while the queue is being processed in WorkMgr. However, it works when defined as a function. Is it mandatory to define subroutine^routine as a function for it to execute properly?

testwqm.mac
 set wqm = ##class(%SYSTEM.WorkMgr).%New()
 set sc=wqm.Queue("subr1^testwqm")  ; not executing the subr1 
 set sc=wqm.Queue("subr2^testwqm") ; executing the subr2 properly
 set sc=wqm.
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Question Mary George · Nov 13, 2023

Hello, 

We noticed from the integrity logs that some of the namespaces in our integration engine are using large amount of space ( ~380GB ) for the global ^EnsHL7.Segment. 

We have culling implemented for large globals like MessageHeader and MessageBody.

Is it a standard process to implement culling for ^EnsHL7.Segment global and any idea about what will be the impact of adding culling to this global?

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Question Stefan Cronje · Apr 5, 2024

Hi all,

I have a situation where I am writing to global from different processes - let's call it an Event Queue.
There is then a different process that uses $order to read through the data - the PubSub processing BP.

Sometimes the writing of this global will form part of a transaction that also insert data into other tables, using tstart and tcommit.
If there is some issue, it will roll back, and the entry written to the global will also roll back.

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Question Ashok Kumar T · Jan 21, 2024

Hello Community,

The process private global doesn't impact the $storage. But, Why the value has decreases at first time of initialization. 

LEARNING>write $zversion
IRIS for Windows (x86-64) 2023.3 (Build 254) Wed Nov 8 2023 13:28:10 EST
LEARNING>write "$Storage: ",$storage
$Storage: 2199023141712
LEARNING>set ^||Test="Test"
 
LEARNING>write "$Storage: ",$storage
$Storage: 2199023136848
LEARNING>write 2199023141712-$storage
4864

Just want to ensure about it.

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Question Yone Moreno · Dec 19, 2023

Good morning,

First of all thanks for your help and time.

We find ourselves at a crossroads in our development journey, and we're reaching out to the community for insights and guidance regarding a critical aspect of our data management strategy.

Our current challenge revolves around the persistence of data in Globals, specifically when it comes to purging. The issue at hand is that, despite purging, data stored in Globals under the current %Persistent classes remains intact. To address this, we are contemplating a shift from %Persistent to %SerialObject for each relevant class.

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Question Ryan Pflughaupt · Sep 21, 2023

Currently I have a program that is going to be used to compare global nodes between namespaces. Using nested FOR statements I am stepping through global nodes and comparing between the namespaces, if the global values are different I then parse the node comparing each delimited segment.

This is working.

I want to now be able to set what global I am in as a variable to expand on this concept. 

 

Program architecture

1.Initializing program that has user prompts to change starting nodes. This program contains the FOR nests to step through nodes.

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Question AndreClaude Gendron · Apr 19, 2016

We are trying to create a simple class extending %RegisteredObject that could be used as a singleton. However we are not able to store it in a global to later be retrieved (by the same process but elsewhere in the code).

I resumed my issue in this small code sample : 

ClassMethod RunMe()
{
   // Create a simple %RegisteredObject
   set obj = ##class(%ZEN.proxyObject).%New()
   set obj.MyProp = 22
   do ##class(%SYSTEM.OBJ).Dump(obj)
   
   // Store it in a global
   set ^MyGlobalName = obj
   write "Stored : " _ obj,!!
      
   // Retrieve it from the global
   #Dim obj2 As %ZEN

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Question John Bradshaw · Jul 12, 2023

I found the thread that discusses object mapping, in particular mapping a common global among more than one namespace. The example that is given is a simple one when it's ^global(sub1, ^global(sub2, etc. However I'm having trouble getting this to compile/work when the global has a fixed subscript amongst variable ones.

I have this global in namespaces LAB and ARK in the following format:
^CB(1,sub1)=....

^CB(1,sub2)=...

^CB(1,sub3)=...

Here is what I have

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Question Lucas Galdino · Apr 27, 2023

Dear experts,
Please, could you help me?

Im trying import a global:

ACB> K ^GlobalManualSend
ACB> D $System.OBJ.Load("C:\Users\BNAPC\GlobalManualSend.xml")
ACB> Set sc = ##class(%Studio.Project).InstallFromGbl("^GlobalManualSend","fv")

But is returning a error about version:

Please, could you help me about it?

Thank you.

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Question Jonathan Wald · May 25, 2022

I am creating "models" that contain rows in several class tables called Model, Path, Node.

So, model 19 includes 1 row in the Model table, 11 rows in the Path table, and 10 rows in the Node table. 

I'd like to write some utilities to "move" model 19 from one instance to another.

I found some old (maybe deprecated?) functionality, the %SYNC.Transporter, which seems to work.  I can write a SQL query to select the rows of interest, and export those record to a ,gof file.  I can create 3 of them (one file per class), and then on the target instance, I can import from the .

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Question Niklas Thilmont · Mar 14, 2022

Hey InterSystems Community!
This is probably far-fetched - is there a way to get notified/get a piece of code triggered whenever the state of a global changes?

Now what could I possibly want with that? Quite simple! I would like to forward the content of a global (in this case the "FSLog" global written by the FHIR implementation) while adding timestamps to it - to create some sort of file-based logging for it.

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Question Peter Stordiau · Feb 20, 2022

Dear people,

I (really) spent hours on finding the maximum size a Global is allowed to be (for Windows, if that matters). All I seem to run into are database sizes (derived from a max number of blocks and block size), but I refuse to believe that is correct because too small to be realistic. surprise 

It will  undoubtedly my fault that I don't understand or misread the concepts of "database" vs Globals, envisioning files as such while one set of functional Globals in one file (?

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Question Bharathsimha Reddy Jakka · Sep 27, 2021

How to find a global's original namespace ? Potentially mapped from a different namespace .

I have a global ^Custom that exists in multiple namespaces but it could mapped from namespace Drone(A) to Launch(B)

Without access to Cache management portal how to find where is my global located using cache code ?

Like if ^Custom == ^[Drone]Custom ??

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Question Guilherme Koerber · Sep 9, 2021

Hello community!

I'm facing a base growth issue, which is being generated by a process and an Ensemble feature.

When executing the process of cleaning up the message queues, the Ensemble “preserves” the Streams that were part of these messages, deleting only the Header and Body. In this way the database (of one of the namespaces) has grown around 60GB per day, which has been maxing out the disk capacity.

InterSystems informed that this is a characteristic and that it is explained in the documents mentioned below.

https://community.intersystems.

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Question Norman W. Freeman · Aug 27, 2021

In Caché, it's possible to iterate a local array using $QUERY() :

set a("foo") = 50
set a("bar") = 30

set key = "a"
for
{
     set key = $QUERY(@key)
     quit:key="" 
     write key_" = "_@key
}

This code works perfectly, unless it's called in a job (eg: a routine called by the JOB command).

In that case, $QUERY will return an empty string. It's like the array cannot be referenced anymore by simply using it's name.
It works using $ORDER(a("")) but I would like to use $QUERY if possible (because my array has several dimensions and it would require several for loops).

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Question Keith Davis · May 14, 2019

I am trying to create an ODBC class that includes all of these as records, but I don't see how I can since the first record has 3 subscripts, the rest have 4 subscripts:

 

Here is my current storage definition:

<Storage name="Test">
<ExtentSize>100000</ExtentSize>
<SequenceNumber>25</SequenceNumber>
<SQLMap name="Test">
<Data name="ModificationDate">
<RetrievalCodeset {ModificationDate}={L4}</RetrievalCode>
</Data>
<Data name="Operator">
<Delimiter>":","|"</Delimiter>
<Piece>36,2</Piece>
</Data>
<Data name="CreationDate">
<Delimiter>":",","</Delimiter>
<Piece>24,1</Piece>
</Data>
<Data name="CreationTime">
<D

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Question Ahmad Bukhtiar · Dec 5, 2020

Hi, we suddenly noticed that one of the edge storage increased by 30% and it was due to ERROR globals which was throwing repeated error for 7 days and it consumed 35GB space. Is there a way to log the storage of edge production on daily basis and compare the increase in storage with previous day and if increase is 5% more than trigger an email to system admit to look why the storage increased suddenly. 

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Question Daniel Aguilar · Nov 4, 2020

Good Morning,

I have this question for a long time. When I make an insert by SQL from an external application in the fields of type %String, if they are empty, it writes the character $c(0) in the global.

Is there a way so that if an Insert is received in a field of type% String with null value instead of the $ c (0) it leaves it empty?:

I have the class defined like this:

Class User.MiClase Extends (% Persistent,% XML.Adaptor)

and the property like this:

Property myProperty As% String;

I have tried creating a trigger or setting default values but it doesn't work.

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Question Norman W. Freeman · Oct 1, 2020

If a global node contains special characters, (eg : a line returns), it will be displayed like this in Portal ("System > Globals > View Global Data" panel) :

^A(1) = "this is"_$c(13,10)_"a test"

I would like to export global data to a txt file using a similar format.

I already wrote the main code (that loops on all nodes and dump them to file), the problem is how to handle special characters.
For the moment I replace them manually one by one. It works, but it's far from perfect :

set text = .
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Question ED Coder · Sep 17, 2020

From my recent post, I uploaded a set of values into a global, and I am trying to compare the first field, and then

$GLOBAL("123", "bone issue")=""

$GLOBAL("234","joint issue")=""

Now, I want to compare and see if the DG1:4.1 segment has the code $GLOBAL and then replace the DG14.1 segment with the code and the description

so For Eg: if DG1:4.1 exists in $GLOBAL("123") then replace the segment with the code and description

Can someone guide me on how I can achieve this?

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