#Caché

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

Documentation.

Question John Murray · Feb 13, 2018

Documentation here lists the kinds of members a class definition may contain. In summary:

  • Parameters
  • Methods
  • Properties
  • Class queries
  • XData blocks
  • Projections
  • (and some that are relevant only for persistent classes):
    • Storage definitions
    • Indices
    • Foreign keys
    • SQL triggers

Later in the same document, a section headed "Class Member Names" contains this warning:

So I'm interested to hear how other DC members handle this.

  1. Do you comply (or at least attempt to comply) with this?
  2. If so, do you use any tools or naming conventions to assist you?
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Question Tony Beukes · Feb 6, 2018

Cache for Windows (x86-64) 2015.1 (Build 429U) Fri Feb 13 2015 14:37:23 EST [HealthShare Modules:Core:12.07.3703 + Linkage Engine:13.04.3703]

Use case: Search an LDAP database from Caché over TLS using Mutual Authentication.

Extract from the %SYS.LDAP documentation:

Secure Connections:
For a Windows client, make sure you have the CA certificates already loaded in the Certificates(local computer)\Trusted Root Certification Authorities certificate store.
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Question Soufiane Amroun · Jan 15, 2018

Hi community ,

i work actually on the access token generation method , i want know where the generated access token are saved ?

My [OAuth2.AccessToken]  tabe is empty , it's logical?

thank's for helping .

Best regards

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Question Arun Kumar · Feb 5, 2018

Hi Guys,

I would to know, I have a drop down list items in my applications. While, am clicking on the drop down bx, there are few numbers of listed items, while am doing mouse over action, I should display the entire text of selected item from that drop down list box, even am not selecting that item. I would like to know about the what is exact text it contains in Zen framework. 

If any lead would be appreciated. 

Thank you in advance. 

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Question Nael Nasereldeen · Feb 11, 2018

Hi,

Is it possible to Save a base64 data string, representing a png, as a binary png file, In Cache?

When I search google , in general , not Cache specifically,  I see such articles:

https://stackoverflow.com/questions/11511511/how-to-save-a-png-image-se…

and this answer:

You need to extract the base64 image data from that string, decode it and then you can save it to disk, you don't need GD since it already is a png.

But I don't know how to implement that in Cache.

Regards,

Nael

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Question Anil S Sheno · Feb 9, 2018

Hi,

      Has anybody used /epic/prd/bin/runlevel with different options to bring up or shutdown the cache db. I cannot see any information about it in the manual.

Regards,

Anil

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Question Rui Figueiredo · Jan 4, 2018

Hi, 

I would like to set the report headerHeight dynamically based on a group records count.

Example:

If GroupA has 5 records then the headerHeight should be 50mm

If GroupA has 3 records then the headerHeight should be 30mm

Could you please advice the best approach to achieve this?

Thank you,

Rui

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Question Daniel Kutac · Feb 6, 2018

Is there an API that would list classes within a given package? I can't find any. I do have a workaround that uses class index, but this query lists all classes available in the namespace and I have to filter those I want. But this is just unnecessary overhead.

If anyone has spotted such API, please let me know.

TIA!

Dan

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Article Titto George · Feb 5, 2018 2m read

Zen report can create PDF document (https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=GRPT_xslfo_pdf_config ). Store your images in the table. Pass session id to the Zen report. Zen report will select images using SQL. The <img> element will insert images to the report:

<img width="100%" src="!@ImageName" contentHeight="scale-to-fit" contentWidth="#(..ImageWidth)#" style="position:absolute" content-type="image/jpg"/> 

Do the following (See the attachment image_to_pdf_using_zen_reports.doc

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Question Eduard Lebedyuk · Feb 5, 2018

Currently to check if the class  is mapped I call:

ClassMethod IsClassMapped(class) As %Boolean

{
  set sc = $system.OBJ.GetClassList(.classes,"/system=0 /percent=0 /mapped=0")
  quit $data(classes(class))
}

And it works, but I'm interested if there is a simpler approach out there?

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Question Minsu Kim · Feb 5, 2018
Hi global developers!

I am using terminal but I have some problem with it.

I use $C(1) (ascii code 1) to separate data but I can't see it in the terminal and This is really hard to see in the table.

So I want to get you guys good brain and skill :)

how can I see it in the terminal ?

Terminal(intersystems) :

I can't see anything

another program :

It replaced ascii code 1 (=SOH) to  ┌ (Special Character)

I want to see like another program in Intersystems's terminal.

Thank you smart developers!

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Article David Loveluck · Feb 1, 2018 1m read

Here is a snippet that I learned yesterday

You can define an index on a collection property but when I tried to use it, I failed. I was using

     Select ….. where …. :xx %INLIST collproperty

But this will not use an index, but the equivalent syntax

     SELECT .. WHERE ... FOR SOME %ELEMENT(collproperty) (%VALUE=:xx)

will use the index 

Check out

     http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY…

Dave

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Question Hemang Patel · Feb 1, 2018

Hi 

I am new to cache and accessing it using odbc (other data sources) from excel. I need to know how to get hold of the number of rows for each every object in my current schema. 

I can find table name using following query but I need number of rows to estimate size of each table.

SELECT *
FROM %Dictionary.ClassDefinition ClassDefinition
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Question Pravin Barton · Jan 31, 2018

This might be more of a math problem than a Caché question.
I have a SQL query that joins two tables. I want to assign a unique ID to each row of the product table.

  1. I could append the GUIDs of the rows in the two tables, but there are a number of clients that expect a maximum length of 50 on this unique ID. Two GUIDs appended make 72 characters.
  2. I could append the two GUIDs and then truncate the result, but now I'm worried about collision.

What's the chance of collision if I append the GUIDs and truncate the result to 50 characters? Is there a good way to solve this without updating the clients?

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Question Thembelani Mlalazi · Jan 30, 2018

I am trying to write an application that will take some information on the database make a call to the Google API distance matrix and get the information to use with rest of the application without using the ensemble part of the development is this possible and how can I do my communication with the  API from a cache class thanks in  advance

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Question Scott Roth · Jan 30, 2018

We have noticed in the course of the last 18 days our CACHE.dat has grown by 20 GB. Is there a way we can break down the data in CACHE.dat to see what could be growing in size?

Let me state it another way.....Is there a way to see what space an Operation/Service/Process is taking up within a certain Production?

Thanks

Scott Roth

The Ohio State University Wexner Medical Center

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Question Virginia Rogers · Jan 29, 2018

Hello,

I have a property which I need to move from one class definition to another as follows:

Old definition:

Class SCHED.SchedEntry
{
  
  Property Experiment as %String;

  Property ScanSlot as list of TracerEntry;

}

Class SCHED.TracerEntry
{
  
  Property Tracer As %String

}

I want to move the Experiment property to the TracerEntry class so that there is a different Experiment allowed for each ScanSlot, like this:

Class SCHED.SchedEntry 
{

  Property ScanSlot as list of TracerEntry;

}
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Question Alfred Schmeer · Jan 29, 2018

Looking at the documentation expalining the use of client side menus, including the drop down menu.

I was messing around trying to get the "Open", once clicked, to use javascript to open windows file explorer to open/pick a file.

I've got it to partially work... Using keystrokes Ctrl-O will open the file explorer yet clicking on the drop down's File/Open does nothing.

Not sure what I'm doing wrong here.

NOTE:  I had commented out the two &html lines in the Testing Method... and doing a Ctrl-O still work.

Why?

 /// Created using the page template: DefaultPublisherDB.NewClass1 
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