New post

#Databases

10

InterSystems Caché database is a file where all the data, application scripts, and users, roles and security configurations are stored. Typically the name of the file is cache.dat.

Documentation.

Question
· Oct 29, 2019
Cache Update Query

Hi,

     I am trying to update an year on a date field in a cache database table but it showing an error message. But the functions are working on select query. The query I used is

update RB_ResEffDateSessPayorRestr SET RESTR_DATETo = DATEADD(YYYY,1,RESTR_DATETo) where YEAR(RESTR_DATETo)=2020

I tried to update only the year which are 2020.

Can anyone please help me, Is there any error in the query?

Thanks

0 12
0 343

Hello everybody. I have a problem a little bit strange. The thing is that there is a Task on Cache that by default is executed everyday at 4:00:00 that, with my settings, will delete all the Audit logs with more than 70 days of existence. The problem is that everyday this task is executed without an error message (status "Success" after the task is finished) but no data is cleaned, the same if I executed this particular task on the "Task Schedule" screen. I'll put here a screenshot of the message after executing the task on the "Task Schedule":

0 12
0 128

Hi Folks,

I created a persistent class as below 

Class myclass.DataBase Extends %Persistent
{

Property ID As %String;

Property Skill As list Of myclass.SerialTablelist;
}

and Created another Serial class as 

Class myclass.SerialTablelist Extends %SerialObject
{

Property PSkill As %String;

Property OSkill As %String;
}

Now I will save the id as below

do rs.Prepare("Insert into myclass.DataBase(ID)VALUES(?)")
do rs.Execute(ID)
0 12
1 426
Question
· Feb 20, 2022
Maximum Global Size ?

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

1 11
0 539

I have several 1GB journals from a LIVE server that I would like to inspect (eg: check which globals have been updated over the time).

Is there a simple way to view those journals using another IRIS instance ? (eg: local installation).

I have been tempted to put those files directly into the journal folder of my local installation and restart the system, however I am concerned that the transactions they contains will be restored and will corrupt the local database.

0 10
1 243

I have some databases in my cache instance that were created from an online backup file (.cbk). I would like to see the information for these databases in the Databases and SQL sections of Management Portal, but they only appear in the Classes section. I can navigate to the files in my cache instance terminal and see the CACHE.DAT files, and a check in the terminal shows that they are mounted.

This is what I see in the terminal for each database when I check to see if the databases are mounted:

%SYS>set db="/path/for/mydatabase"

0 10
0 219

Hello everyone,

Im just wondering if there is any possibility to "Listen" to a cache DB? We have our cache DB somewhere else provided by a different company, we are provided the interface to connect to that cache DB so we can extract the cache DB every night.

Im just curious if theres a way to "listen" to the cache DB, so if theres any changes on the table in the cache DB, I could make a trigger to extract the table again.

I know i could just set my ETL every hour or so... but that would extract all the tables in cache DB.

0 9
0 740

I would like to know if there is a way of having a callback or something similar, on persistent classes that is always called after the execution of the operation (failed or successfull).

%OnOpen is executed prior to the action, and there is no post callback

%OnAfterDelete and %OnAfterSave are executed after a successfull operation

0 8
0 247

Hi!

I'd like to know if there are any issues if an index is inserted into a table without running the %BuildIndices() method.

It's important to note that data inserted before the index is not important for retrieval, so it's not a problem data inserted before the index don't show up in queries.

The reason why I'm asking this is that I'd like to avoid index reconstruction on big tables which I need to inser such index.

I'm using Cache 2018.1.

Thanks,

José

0 8
0 282

Currently, we have an application running in one namespace ("Database B") that has globals and routines mapped to another database ("Database A"). After enforcing clean up on Database A, we found that 90% of the disk is free. We would like to compact Database A and release the unused space. However, we are running OpenVMS, which seems to be the issue.

For databases consisting of only globals, we are able to use ^GBLOCKCOPY; however, we need to ensure that the routines and mappings are also copied.

1 8
0 1K

Hi,

I'd like to compare classes in two namespaces, whether the corresponding .cls code exist in both namespaces or not, and if it does exist in both namespaces, whether the CLS code is identical. If there is such a routine out there the better, I'd like to see it. If not, I know how to get a list of classes in each namespace and I can check currClss.TimeChanged. What I cannot find is the following:

0 8
0 410

I've been accessing Cache tables from a developer/reporting side, but am now involved in a project to create a data warehouse for our application. I'm trying to find a query I can use to return the sizes of all the tables in the database, so we can identify the largest tables and handle those individually. Can someone give me a query I can run against our Cache database to return the sizes of all the tables from largest to smallest?

Thanks for the help

0 8
0 664