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Kyle Baxter · Aug 4, 2022

Hey Juan,

So at a guess - Intersystems is doing the thing where they just take whatever error you return, and tack on their own error on top of it.  In some cases they return all errors, and in others they just pick off the first one of them and return that (GetOneError or something similar).  This is a bug (in my opinion) - you should open a WRC ticket and have them fix it.  They might also be able to give you a workaround.


Good luck!

Kyle Baxter · Oct 13, 2021

WHO DARES SUMMON ME!

Oh, hi Evgeny!  Great to see you, hope you're well!

For everyone else, Evgeny is right, of course (because he's quoting me laugh) but note that in newer versions (IRIS, for instance), you can make use of the %JSON.Adaptor to do something like:

Class Test.DoesItJSON Extends (%RegisteredObject, %JSON.Adaptor)
{
Property aString As %String;
Property anInteger As %Integer;
}

The do something like:

s obj=##class(Test.DoesItJSON).%New()
s obj.aString="Hello"
s obj.anInteger=123
d obj.%JSONExportToString(.jsonstring)
zw jsonstring
    jsonstring="{""aString"":""Hello"",""anInteger"":123}"

This is better for creating new classes (again in later versions than you're on, you need to use the jsonProvider or the altJsonProvider) that you think you're going to want to serialize into JSON.

Kyle Baxter · Oct 29, 2019

While I agree with what a lot  of people said here - you probably should use the the expanded syntax - it doesn't exactly address the fact that it is much quicker (or FEELS much quicker) to type the abbreviations.  Especially when I'm in the coding groove and trying to get stuff done.  The fact is your IDE can can expand all the commands.  My take  is this: let your developers  do whatever makes their job easier.  It's easier to write shorthand, but read longhand - make a tool that converts shorthand to longhand and put that into your source control.

Kyle Baxter · Sep 17, 2019

@Vitaliy.Serdtsev  - you were right to summon me here!

SQL optimization is a HUGE topic (as has been mentioned) but InterSystems products are VERY good at JOIN-ing large tables.  Here's the issue, you're NOT doing a JOIN, you're doing a Cartesian Product.  Your query:

select o.col1, o.col2, op.partnum, op.amount
from orders o join orderpositions op
where o.orderDate > $H-1000

Is saying to JOIN EVERY order with EVERY order position over the last 3 years (give or take).  As you are not restricting how you're JOIN-ing the two tables together, there's not much we can do to optimize this.  That said, when bringing up these issues (and you should! either we help you write better code or we fix problems in our code!) you should provide your table definition and a query plan.  I think if you look at the query plan (which you can get from the management portal) you'll see that the problem is you're missing your JOIN condition (something like ON op.Order = o.ID, if I were to take a guess).  If that's not the case and this is the query you want to be running, please send over your class definitions by doing:

d $SYSTEM.OBJ.Export("User.orders.cls,User.orderpositions.cls","C:\Temp\KyleWantsThis.xml")

and I'll be happy to look at this further.  Of course, you are also very welcome to open up an issue with InterSystems Support - best support in the industry, and I'll bet a kidney on that statement.


 

Kyle Baxter · Mar 6, 2019

I'm a bit confused here - granting the user SELECT privileges on those tables didn't allow your customer's ODBC client to work?  It sounds like %ALL is working as designed (if you have %ALL you own the system and can therefore see everything).  What does the client tool look like when you grant just SELECT access to certain tables or schemas?  Can you try a different ODBC client to see how that behaves (I like WinSQL)? 

Kyle Baxter · Mar 5, 2019

Your IDKEY is your ID field, so it is a unique identifier that also becomes the subscript of the global you use to store your data.  A Primary Key is any unique field (or combination of fields).  Having it be primary key is the same as it being unique, as far as I know. 

Changing your Identity property to have MINVAL=1 should make your class bitmap eligible.  If that doesn't work, please contact the WRC.

Kyle Baxter · Mar 5, 2019

The easiest solution here is to link the table from another namespace.  Only takes a second and you don't need to screw around getting the storage right (note: do NOT start editing storage defs if you can avoid it - that is not an easily maintained solution).  This solution does not work if you have to JOIN the two tables together (we call this a heterogeneous JOIN), however.  The next best solution is to write your own class query as @Stephen Canzano & @Michael Smart  have recommended.  It's a little work up front but you can make some easy changes, such as creating a temp table and populating it with data from the other namespace or using a process private global.

Kyle Baxter · Feb 27, 2019

For what situation(s) should a user go to this page?  For login?  After login?  When they've been timed out? 

I think what you want to do is have a custom login page that automatically redirects you to a default landing page.  But that's not configurable, you need to write that logic into your login page.  But you can put your custom login page into the Web Application menu.

Kyle Baxter · Feb 25, 2019

I do know a way to add permissions on a table that doesn't exist yet - so I'm adding on to Pravin's answer. 

GRANT SELECT ON SCHEMA SQLUser TO MyRole

Then any table added to the SQLUser schema will be accessible to the role "MyRole" when that table is added.  Since Schemas (or schemata) are how we split up tables into more generic categories, this is a nice way to also spit up your permissions. 
 

Kyle Baxter · Feb 22, 2019

So I spent 10 years working in Caché product support and this has popped up before. But I've only ever seen it on development systems when folks are creating, deleting, and updating classes at a much higher rate than would be acceptable on a production machine.  And I'm relatively sure it was all new development.  I think it ends up being an artifact of new development and the first creation of your class structures, though I've never been able to find what caused it in the past. 

Kyle Baxter · Feb 22, 2019

OK you seem to have 3 questions here:
 

1) IRIS or Caché: If you're working with new the answer is IRIS.  IRIS is our "latest and best" and you'll be best off going there.

2) Which IDE: Doesn't matter.  Atelier is an Eclipse based IDE, which is nice if you're used to Eclipse.  I haven't touched VSCode so I can't speak for that.  Studio is our home-grown IDE.  Choose one, I'm not sure it matters at all, as long as you're comfortable using it.
 

3) How to deploy: In IRIS we have containers for deployment, so if you want to go that direction, great.  However, you might be more comfortable working on your own machine, which you can also do and bring in containerization later (if it makes sense).  Remember, using containers is a tool, and it's not ALWAYS the right tool for the job.

Good luck!  And if you have questions about building your application be sure to let us know!