Globals are multidimensional sparse arrays which are stored in InterSystems Data Platform. Everything in InterSystems Products is stored in Globals: Classes, Tables, Documents, Code.
We're developing Ensemble PoC and one day our frontend developer (who doesn't have Ensemble production running) said that Populate just doesn't cut it and he needs to see the real data. He needed only one object, but the problem was - it's a big object. Still, I checked ids of everything related and wrote this command (parts omitted, but you get the idea):
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.
For some years I missed being able to offer, to everybody interested in ObjectScript, a tutorial more or less complete, to start with ObjectScript. Something that could help more and make things easier to those new developers that come to our technology... something intermediate, halfway between the common "Hello World!", that doesn't really get you further, and the "Advanced Training", that is unaffordable because of lack of time,etc.
If there were something truly helpful not only as an introduction to the ecosystem, but as a starting point, as a boost, to really start to walk into ObjectScript and move forward by yourself... wouldn't that be awesome?
Have very little XML experience and have been able to manually create output. Have a need to take data that I store in a M global (example: ^TML("HDATA", ) and out put it in CCDA XML format.
Are there any examples of M code using the XMLWriter to accomplish this?
Those of you that worked already with ECP might know that it operates not only across operating systems, processor technologies (big-little-endian), but also -with limits- across versions in C/E. This cross-version feature also includes IRIS (verified for 2020.1) and C/E (2018.3)
We are using CACHE 2017.2.1, I would like to retrieve data from Journal for killed global. Let say we have global name ^ EMP(123) with data and also have some child nodes and it has been killed by using cache kill command for some reason and we don't know who has executed this and when. My questions are below.
1) Can we get back the data of killed global from journal files,Is it possible or not ?
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.
Often we need to use relatively small arrays with constants, static arrays in algorithms, etc where we need to do something with each element of an array. There are several ways to deal with it in ObjectSctipt.
Previously I used to use globals, locals, PPG for this but not so long time ago figured out that %List is a way too handy.
Indeed, suppose we have an array of months and need to set up and use it in our code.
I wonder if you could help me with a problem with persistent globals and journals.
We have a few interfaces using a persistent global just to translate some codes. The use of that global is like a lookup table...an interface calls a method that search for a field (in the message) in the global. If found, the code is translated with another field from the global.
I have a classname and a property name. I want to know, when I get object value directly from a global, which property corresponds to which position in the $lb structure.
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)
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.
I am inserting rows in a table. This table is appearing in all namespace as I did global mapping.
So once I run insert command from a method, it insert the rows. When I run the same insert command from other namespace, it replace the existing data in table.
Insert command is same in all namespace but the data I m inserting is different.
I have created a package to export a Global into JSON object file and to re-create it by reloading from this file embeddedPython refers to the new available technologies. It should be understood as a learning exercise of how to handle the language interfaces. Only Global nodes containing data are presented in the generated JSON file. Differently from the previous example, this one is using embedded Python only, no ObjectScript. Therefore PURE
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:
Is the default language (i.e., $$$DefaultLanguage, which is used as the basis for localization with $$$Text/etc. at compile time) always "en" for new Caché installations, or could it be different? How is this determined? I don't see an option to select a language during Caché installation.
Also, is there a supported/preferred API for setting the default language? Looking at %occMessages.inc, one option would be:
Hello. When you export and then import a table of data, is the import smart enough to figure out if a row already exists in the new namespace, and if so update the row rather than just save/add the row?
For example, we have a table in DEV, and the same table in QA. The DEV table has more fields than QA. When we moved up the class, the field definitions went with the table into QA, so now the table definition is the same in both.
By views
Open Exchange app