Globals are multidimensional sparse arrays which are stored in InterSystems Data Platform. Everything in InterSystems Products is stored in Globals: Classes, Tables, Documents, Code.
I know the process ID< and I know the global name: ^||testing(index). From the terminal (and therefore, and different process ID), how do I view the contents of ^||testing() ? Not the list of process private globals; the contents of this single PPG.
I like to validate some use cases and have the following question. I am relatively new to IRIS. Perhaps someone can help:
1. I have a global m[x,y,z,f] distributed across multiple sharded instances 2. I know that i can set assign computed SQL expressions to class variables using Objectscript 3. Is there a possibility in Globals API to do the same ? Set f = x + y as a computed expression in the global m[x,y,z,f] ?
a. We would want to use the global API to change f programmatically using code
ACB> K ^GlobalManualSend ACB> D $System.OBJ.Load("C:\Users\BNAPC\GlobalManualSend.xml") ACB> Set sc = ##class(%Studio.Project).InstallFromGbl("^GlobalManualSend","fv")
If a global node contains special characters, (eg : a line returns), it will be displayed like this in Portal ("System > Globals > View Global Data" panel) :
^A(1) = "this is"_$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 :
If I were trying to access an index of a global variable, what time complexity would this operation have? My understanding of languages like Java/C++ is that arrays are stored as blocks of memory so that x[15] would have a lookup time complexity of O(1) because it just goes to (address of the array + 15) and retrieves the value stored there.
How does this work in Cache where the index of a variable isn't necessarily an integer value? If I were to have a variable like the following:
Now I would like to check for each user whether they are allowed, therefore I'd need to iterate through the Global. How to do that? It seems that I can't use $Order here like such:
S FF = "" For { S FF=$O(^Users(FF,"SETTINGS","isAllowed")) Q:$L(FF) W "User ",FF," is allowed",! }
For those of you who might be new to IRIS, and even those who have used Cache or IRIS for some time but want to explore beyond its usually-assumed boundaries and practices, you might want to dive into this detailed exploration of the database engine that is at its heart, and discover just what you can really do with it, going way beyond what InterSystems have done with it for you.
At the heart of IRIS and Cache is a very interesting database architecture that we, at M/Gateway Developments, refer to as "Global Storage". If you ever wanted to know more about the fundamentals and capabilities of this underlying database, you might want to read a major analysis we've put together:
I have a %GlobalBinaryStream object that I'm trying to save as a local file after being received through a SOAP Web Service.
To do this, I created a %Stream.FileBinary object and wanted to set where the stream copied to this object would be saved by using either the DefaultStreamDir() ClassMethod or the NewFileName() ClassMethod. However, the documentation isn't very helpful on how to use these ClassMethods.
Is there something in Cache that is equivalent to partitioning a table in Oracle? I'm trying to break some big tables into groups so that the most frequently accessed data is faster to retrieve.
Here is some information on this concept from Oracle.
Currently, namespace Alpha is configured to use database AlphaDB as its global database. How would we go about having namespace Alpha configured to use database AlphaDB for its global database except where global ^Customers(CustomerId) has a CustomerId greater than 10M, which we would like to have it redirected to database BetaDB.
In other words, ^|"AlphaDB"|Customers contains all customers between 1 and 10,000,000; and ^|"BetaDB"|Customers contains all customers greater than 10,000,000. Any help would be appreciated.
I'm working on a task where I need to apply journal file records to another database. I can't use Journal.Restore class methods as I need to perform some data transformation, therefore I'm reading journal file record by record using %SYS.Journal.Record API.
It seems that there are only few journal records that I need to process, namely:
In the prior part of this series we have provided introduction to Google MapReduce approach, but still not covered their possible ObjectScript implementation. Which we will start to explain today.
During my search for a snapshot of a persistent object, I met a feature that I would like to share as it could be useful in some special situations. My trigger was to have a before- and an after-image during unit testing.
Some of our interfaces use globals for lookups, but we are currently looking at putting a groups of (document) interfaces in a separate production with a shared ‘Default Database for Routines’ to reduce code duplication.
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