#SQL

While working on getting JSON support for some Python libraries, I discovered some capabilities IRIS provided.

• JSON_OBJECT - A conversion function that returns data as a JSON object.
• JSON_ARRAY - A conversion function that returns data as a JSON array.
• IS JSON - Determines if a data value is in JSON format.
• JSON_TABLE function returns a table that can be used in a SQL query by mapping JSON.
• JSONPath support - is a query language for querying values in JSON.

I am currently experiencing frustration with trying to Authenticate an Active Directory account through JDBC as the Hospital System moves from OnPrem SQL Server to using Azure SQL Server with Microsoft Entra Authentication.

Microsoft cannot give me a straight answer of what is required from a JDBC standpoint to authenticate from a Linux environment.

I am working with WRC, but we are both struggling to find the specific answer for JDBC. If I use my local desktop and JDBC to connect through DBeaver I don't have an issue.

Not sure there are many that connect to MS SQL to execute queries, stored procedures, etc, but our Healthsystem has many different MS SQL based databases we use within the Interoperability environment for various reasons.

With the push to moving from on-prem to the Cloud we ran into some difficulties with our SQL Gateway connections and knowing how to config them to use Microsoft Entra for Active Directory Authentication.

There are many articles out on the web, but there was not one that could give us the full answer to what we needed to do, and Microsoft wasn’t much help.

Hello guys,

I need to tranform columns into rows or rows into columns.
I'm using only SQL Cache.

The code:

SELECTFROMWHERE

The columns: 

Can you help me?

Thanks

Hi Everyone!

The Certification Team of InterSystems Learning Services is currently developing an InterSystems ObjectScript Specialist certification exam, and we are reaching out to our community for feedback that will help us evaluate and establish the contents of this exam.   

Please note that this is one of two exams being developed to replace our InterSystems IRIS Core Solutions Developer exam. You can find more details about the other exam, InterSystems IRIS Developer Professional exam, here. 

How do I provide my input? Complete our Job Task Analysis (JTA) survey

Hello everyone,

I’m facing issues with replicating data from my Caché 2016 database to a PostgreSQL database. I need to handle around 300 data updates per minute, and whenever certain tables are modified, those changes must be reflected in other databases.

So far, I’ve tried various approaches, including:

• Setting up an intermediary API,
• Using Azure Service Bus,
• Leveraging Caché Jobs,
• All of which rely on table triggers as the entry point.

However, each of these solutions has led to performance bottlenecks and system lockups.

I need to use a context variable in my code block for the table to query. When I use :content.table, it does not work.  When using the literal, it does.  How do I get the :context to work?

Hi! I've extended my demo repository, andreas5588/demo-dbs-iris, to make it easy to test the FOREIGN SERVER and FOREIGN TABLE features in IRIS.

To achieve this, I created a namespace called FEDERATION. The idea is as follows:

1. Set up JDBC connections for each namespace.
2. Create a FOREIGN SERVER within the FEDERATION namespace for each connection.
3. Define a FOREIGN TABLE a least for one table based on each foreign server.

The Script:  demo-dbs-iris/src/sql/02_create_foreign_server.sql

IRIS does not support executing SQL statements that combine tables from different namespaces.

In tracking down some of our Orphaned message issues, I was wondering if setting our EnsLib.SQL.Snapshot variable equal to "" was the same as calling the .Clean() method on EnsLib.SQL.Snapshot? Are they the same?

should I be possibly using ##class(EnsLib.SQL.Snapshot).%Delete() instead?

Hy Friends,

I have a little problem, I need to diplay the data based on input status (first time and after)

this is the data:

and this what I need to display

the notes become new because it is the first time that the data has been inputed, and it will become old if we have the data before (2nd data, 3rd data  the notes will become old).

I've try to use SubQuery (with LAG Script also) but it doesn't works, because it will give a notes Old even it's a New Data

Does anyone could help me ?

Thank You

Best Regards,

Steven Henry

I tried executing the SQL JSON_TABLE query with large JSON string(more than 200000 characters) and I got the below error. I'm curious about this under the hood workflow and how does it reach reaches MAXSTRING.

 Thanks!

Hello, community.

I have a problem with running a SQL query on a linked MySQL table.

The connection works fine, but the following query throws an error:

SELECT   TOP 10 * FROM   linkedinternal_test.persons

 [SQLCODE: <-400>:<Fatal error occurred>]

  [%msg: <Remote JDBC error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '10 T1.PersonID AS C1,T1.LastName AS C2,T1.FirstName AS C3,T1.Address AS C4,T1.Ci' at line 1. >]

Linked table class:

/// Generated by the Link Table wizard on 2025-01-08 16:09:03.  Note that you can access the data in this class only when the external database is accessible.

The Lo-Code Challenge

Imagine the scene.  You are working happily at Widgets Direct, the internet's premier retailer of Widgets and Widget Accessories.   Your boss has some devastating news, some customers might not be fully happy with their widgets, and we need a helpdesk application to track these complaints.   To makes things interesting, he wants this with a very small code footprint and challenges you to deliver an application in less than 150 lines of code using InterSystems IRIS.  Is this even possible?

Hello everyone, 

My team is currently developing guidance and best practices for the generation, storage, and deployment of TUNE TABLE statistics across development and production environments. With that in mind, we want to get an idea of what methods teams in the field have developed for handling this data. In particular, we’d like to know the following: 

1. How often do you use TUNE TABLE in your development vs. production environments? 
2. Do you utilize the $SYSTEM.SQL.Stats.Table package to generate and export TUNE TABLE statistics as files? If so: 
   1. Do you store these in source control?

There are three things most important to any SQL performance conversation:  Indices, TuneTable, and Show Plan.  The attached PDFs includes historical presentations on these topics that cover the basics of these 3 things in one place.  Our documentation provides more detail on these and other SQL Performance topics in the links below.  The eLearning options reinforces several of these topics.  In addition, there are several Developer Community articles which touch on SQL performance, and those relevant links are also listed.

There is a fair amount of repetition in the information listed below.  The most important aspects of SQL performance to consider are:

1. The types of indices available
2. Using one index type over another
3. The information TuneTable gathers for a table and what it means to the Optimizer

4. How to read a Show Plan to better understand if a query is good or bad

Hello my Friends,

I have a question, I have a data like this

And I want to create a display like this, which I can put a status column beside the Item Column

The status become new, if there's no previous item, and if there's a same item after the first one, the status become Old

Does anyone could help me ?

I need to display it without subquery if possible

Thank You

Best Regards,

Steven Henry

Hi everyone,

I’m currently experimenting with the SQL Gateway Connection, CREATE FOREIGN SERVER, and the THROUGH command (IRIS Documentation). To speed up my tests, I’ve combined several DemoDataSets in a Docker container and would like to automate the creation of SQL Gateway Connections using code. 

(By the way, if you’re interested, the Docker container is available here: Demo DBs IRIS.)

To achieve this, I’m using SQL to create a connection by running a command like

Earlier this year I announced availability of a VS Code extension for coding in ObjectScript, Embedded Python or SQL using the notebook paradigm popularized by Jupyter. Today I published a maintenance release to correct a "getting started" problem.

Here's a video of the installation steps from the extension's README:

(video superseded by an update in a later comment)

Why not try it for yourself?

I recently met an ages old issue related to code maintenance:

• You have access to your IRIS server just over ODBC/JDBC
• no VSCode access, no Studio access
• no (Web-)Terminal access

But you need to take a look on Classes or Routines or Globals !!
Anyhow SQL is your friend.

• First you need a simple table as temporary text store.

CREATEGLOBALTEMPORARY

Not a thrilling action.

• Next you export your code to local file and import it to your table

IN

How to use it:

where

And you get:

"1"

• Or traditional if you prefer XML output over UDL use 
• $system.OBJ.Export() as export method.

<?xml version=

I am attempting to create a Foreign Server/Table so I can pull some information in from MS SQL server via JDBC connection, but as soon as I create the Server/Table and logout the Foreign Server disappears.

CREATE FOREIGN SERVER Epic.Clarity 
   FOREIGN DATA WRAPPER JDBC CONNECTION 'MS-EpicClarity'

logout, then run 

the documentation - Defining Foreign Tables | Using InterSystems SQL | InterSystems IRIS Data Platform 2024.3 mentions "A user that creates a foreign server must have the %MANAGE_FOREIGN_SERVER administrative privilege" but I am not finding that security setting to give to my role.

A Quick Start to InterSystems Cloud SQL Data in Databricks

My IRIS instance is connected to a Postgres database using SQL Gateway and linked tables. One of these tables is projected to the Patient class. I want to select a record from this table by ID and convert it to a FHIR resource using the %ExistsId and %OpenId methods. I noticed that if I call these two methods from the console, the record is always found. But, if I do the same from the FHIR Facade layer, the %OpenId method returns NULL.

Like many others probably find themselves, we were stuck doing live data mapping in our Interface Engine that we really didn't want to do, but had no good alternative choice. We want to only keep mappings for as long as possibly needed and then purge expired rows based upon a TTL value. We actually had 4 use cases for it ourselves before we built this. Use cases:

Hi everyone,

I’m using EnsLib.SQL.OutboundAdapter in my InterSystems Ensemble operation to execute an insert statement in Sql Server Management Studio 20. While inline queries (e.g., constructing the query string with _ concatenation) work fine, I'm facing issues when trying to use parameterized queries.

Serialized JSON: {"CHI":"2894","Forename":"Janis"}

Include Ensemble

ClassExtendsAs

•  Is there a specific way to pass parameters using objectscript to sql server
• Are there any known limitations or special configurations needed for parameterized queries with this adapter?

First time trying to use Foreign Tables/Servers instead of Linked Tables...

Within the SQL Editor inside of the Managment Portal, or connecting through DBeaver JDBC how we can see what Foreign Servers have been defined? Is there a way to query and verify structure of the Foreign Server connection to know that we are building the correct Foreign Tables?

I attempted to create my first Foreign table but it failed when I tried to query the tables because it said the table could not be found. But when I sign into the Database via SQL Management Studio, I can see the table.

Hello My Friends,

I have a question how to use order by %DLIST, this is my code:

SELECT

$ListToString(%DLIST(DISTINCT MRDIA_ICDCode_DR->MRCID_Code),', ' ) ICDX,

$ListToString(%DLIST(DISTINCT (MRDIA_ICDCode_DR->MRCID_Desc || ' (' || MRDIA_DiagnosisType_DR->DTYP_Code || ')')),', ' ) Diagnose

FROM SQLUser.PA_Adm

LEFT JOIN SQLUser.PA_AdmInsurance ON (PAADM_RowID = INS_ParRef AND INS_Rank = 1)

LEFT JOIN SQLUser.PA_AdmPackage ON (PAADM_RowID = PACK_ParRef)

LEFT JOIN SQLUser.MR_Adm on MRADM_ADM_DR = PAADM_RowID

LEFT JOIN SQLUser.MR_Diagnos ON MRADM_RowId = MRDIA_MRADM_ParRef

LEFT JOIN SQLUser.

I have issue with one of my queries. That query work fine for ages, but suddenly stop works and giving me SQLCODE 100 in the routine. 

&SQL(
	  SELECTFROM) AND kiosk = :%var

If I copy this same query to the management portal and replace variable with real ID I will get back 6 or more rows.

The rise of Big Data projects, real-time self-service analytics, online query services, and social networks, among others, have enabled scenarios for massive and high-performance data queries. In response to this challenge, MPP (massively parallel processing database) technology was created, and it quickly established itself. Among the open-source MPP options, Presto (https://prestodb.io/) is the best-known option. It originated in Facebook and was utilized for data analytics, but later became open-sourced. However, since Teradata has joined the Presto community, it offers support now.

Hence the question: is there a way to do that?
The goal is to get data (from half a thousand to 3-4 thousands lines) from DB, calculate standart deviation  then use it as logical condition in analyzer. 
For example IF std > custom_value = show_the_result ELSE null
There is a STDDEV(MDX) method used in Analyzer but it is a measure and it can not be used as logical condition (correct me if i am wrong)

And there is a Embedded Python with numpy, but logic behind STDDEV(MDX) and numpy.

Production Configuration

This demo has an interoperability production with 16 items. 

Production Configuration HL7 + Kafka Producer

The first part of this demonstration consists of sending an HL7 SIU file which will be transmitted to the 2 other HL7 flows (HTTP and TCP), and transformed and transmitted to the Kafka server. HTTP and TCP flows will transform HL7 messages in the same way before sending them to Kafka as well.