#SQL

Hi Community!

There are two general ways to execute arbitrary SQL  in serverside ObjectScript code: EmbeddedSQL and ObjectScript SQL a.k.a. Dynamic SQL.

E.g. if we want to get the value of the property of instance with a certain ID using SQL we can do:

&sql(SELECT Name INTO :name FROM Sample.Person WHERE ID=1)

write name

Same result with %SQL.Statement:

set rs=##class(%SQL.Statement).%ExecDirect(,"SELECT Name as name FROM Sample.Person where ID=1")
  do rs.%Next()
  write rs.name

Let's imagine you have only SQL. You need some table where you should increment value in some property when you update this line.

We have the table

CREATE TABLE "test" (
  "identifier"   VARCHAR(200) NOT NULL,
  "value"        INTEGER,
  PRIMARY KEY ("identifier")
)

Just wondering an Insight in the difference between these two indexes

IdKey / PrimaryKey
================= 

Property Identifier As %Integer

Index Index1 on Identifier [Idkey]

Index Index2 on Identifier [PrimaryKey]

What's the difference?

1. If I don't have Index1 and only have Index2,  then cache does still make its own id.
So how and why  do I ever use the PrimaryKey.  In Joins ??

Table1.Identifier = Table2.Identifier instead of Table1.Id = Table2.id ??
But I can still use Table1.Id = Table2.Id as cache still made one ID field

So where is PrimaryKey useful in cache?

I try to create a column with computeonchange. 

Its works with CREATE TABLE sql command, but if i use ALTER TABLE ADD COLUMN sql command this computeonchange doesn't works.

any reason why?

example:

CREATE TABLE MyStudents (   Name VARCHAR(16) NOT NULL,   surname VARCHAR(16))

alter table MyStudents add column fullname Varchar(50) COMPUTECODE { SET {fullname}={Name}_ "?" _{surname}} COMPUTEONCHANGE (Name,surname)  

insert into SQLUser.MyStudents (Name, surname) values ('name1',null)

update MyStudents set name = 'name' where name = 'name1'

this not updates fullname column value....

Hi,

When Creating a custom security role, what privileges do I need to add to it, in order for the users that I grant him the role, to be able to use 

dynamic SQL to perform read only queries on all tables in a namespace?

I have a security role, that contains the %Service_SQL privilege,

And yet when I connect to a terminal and try to run an SQL query using dynamic SQL , I get a "user is not privileged for the operation" error.

reading the documentation , I understand that %Service_SQL privilege privilege is not enough, but I don't understand what privilege to add,

SetIdentityInsert call controls the ability of the user to specify a value for the IDENTITY property when saving a new object, a value for the IDENTITY column or an explicit ROWID value in an SQL INSERT. If IDENTITY_INSERT is false and the user specifies an explicit IDENTITY or ROWID value when saving a new object or inserting a new ROW then an error condition is reported.

Setting takes effect immediately and lasts for the duration of the process or until SetIdentityInsert is called again.

My question is how can I change this setting system-wide?

Hi Community!

Suppose I have a property in a ObjectScript class:

Property values As list Of %String

What an SQL query can help to return the values of the property as JSON array via SQL access (JDBC)?

Is there a way or can it be done to use conditional logic in sql like so

 Query Q1(formal as %String) As %SQLQuery [ Final ]
{
    
    SELECT patientnumber,ID, CASE
    WHEN ID = 50 THEN "The is 50"
    WHEN ID = 30 THEN "This is 30"
    ELSE "The quantity is under 30"
END FROM Audit.Table WHERE ID = :formal AND EndDate is null} 

}

Problem

I got a quick answer from this forum yesterday so I'm going to try my luck again today!  I've hit an error in another table when trying to extract through the Cache ODBC driver, but this one gives me less details and I'm struggling to pinpoint what might be causing the error.

The table I am trying to extract is called REF_TABLE_ONE.

Here's the Error:

[Cache Error: <<NOLINE>%0AmBx1^%sqlcq.PRD.2249>]
[Location: <ServerLoop - Query Fetch>]

Research/Trial & Error

Problem

I'm working on exporting data from an Intersystems Cache database through the Cache ODBC Driver. There is a particular table that is giving me an error message. The ODBC Driver crashes and reports an error from the Cache system. I think I was able to trace down where the error is coming from, but I do not know how to debug or fix the error.

The table I am trying to extract is called SEDMIHP.

Here's the Error:

[Cache Error: <<UNDEFINED>%0AmBd16^%sqlcq.PRD.3284 ^SEDMIHP(4,77)>]
[Location: <ServerLoop - Query Fetch>]

Research/Trial & Error

Let Say I have 
Class Carrier Extends %Persistent

Property Employee As Array of Class Employees

Class Employees Extends %SerialObject

Property Name As %String

Property Address As Array of Class AddressDetail

Class AddressDetail Extends %SerialObject

Property Street1 As %String

Property Street2 As %String

I can get value for Employee Name  as Employee_Name.

But I want to Get Value of Address Street1 and Street2 of Class AddressDetail using SQL Query
How can I get that?

Hi, I'm looking for a way to implement the JDBC pattern "executeBatch" in ObjectScript: https://www.tutorialspoint.com/jdbc/jdbc-batch-processing.htm

Since Ensemble 2017.2.2 there is a new method called executeParametersBatch : https://docs.intersystems.com/ens20172/csp/docbook/relnotes/index.html#…

Even in the Ensemble 2018.1 change log, mention a patch on this method: https://docs.intersystems.com/ens20181/csp/docbook/relnotes/index.html#…

I need to select my result into a list and be able to loop through the list when query finished any help appreciated here is where I am

##sql(SELECT %ID INTO :IDArray() FROM MergeHyland.TypeTwoDimesionCollection WHERE GUID = :Key AND EndDate IS NULL)
for I=1;1:$LISTLENGTH(IDArray)

{

w $Data(IDArray),i

 


}

I have this query That I am trying  to use in my class when testing on the terminal I expect to get the results printed on the terminal but I am only getting zero printed please can anyone out there advice on what I am doing wrong

Let's say I have this property:

Property FavoriteColors As List Of %String;

I heed to convert it to JSON using SQL or at least without object access (so direct global access).

What's the fastest way to do that?

I thought about JSON_ARRAY and JSON_ARRAYAGG sql functions but they don't do that.

I have a persistent class.

I want to store one of the properties there as a stream or a string depending on a size.

99% of values would be strings (less than $$$MaxStringLength characters) so I don't want to store everything as streams.

What do you think of this approach?

What's the best architecture to implement in this situation?

I've mapped multiple tables (UNION on mapped SQL classes) into a view, using CREATE VIEW.

Through ODBC, in Entity Framework, I am querying against that view and offering paging. The paging is implemented using IQueryable.Skip and IQueryable.Take. 

Skip seems to have unexpected results, I believe due to incorrect SQL generated by the Entity Framework provider, though perhaps I've done something incorrectly. The generated SQL looks similar to this (with some bits replaced or altered for security reasons), the basic structure is unaltered.

I have an sql statement that I would like to execute but I get the error

"zSearchChanges+5^MergeHyland.TypeTwoUtil.1 *KeyID"

and here is my sq

l  "&sql(SELECT Key INTO :KeyID FROM MergeHyland.TypeTwoDimesionalTable WHERE Key = :Key)" any ideas why 

Hi Community!

New session recording from Global Summit 2018 is available on InterSystems Developers YouTube Channel:

An Outlook on Scaling Out

Hello,

I'm looking to find if there is a datatype convert equivalent in Object Script to SQL convert function. Have a VarBinary string coming in from source application (which is really performing a SQL dump). The source application uses the standard SQL convert function to convert from varchar to varbinary on their side.

I know &sql(Convert()) should work in Object Script, but am wondering if there is a better way of doing this. 

Getting data in via flat file (Record Map), then using data transform to transpose this data to SDA3. 

A very simple SQL

SELECT field1 F1, count(field2) CntF2
FROM GCT.PA_Data
where field1 is not null
group by field1

gives an error back:

 [SQLCODE: <-461>:<Communication link failure>]

  [%msg: <Connection 'TRAKCARELIVE': Execute: SQLState: (HY000) NativeError: [10053] Message: [Cache ODBC][State : HY000][Native Code 10053] [c:\intersystems\ensemble\bin\cache.exe] Software caused connection abort> ]

It does work in another (test) environment, but not on live. Any idea why?

Dear all,

In our application made in Caché object script, when we deploy some classes modified we have the option of calling "Purge queries" feature of Caché.

We only were doing this call when a %Persistent class definition (table) was modified, as we assume that no other changes affect the cached queries and we don't  want to purge them by default, as the first run of a query becomes slow.

We had a case where no table definition was changed but a purge queries was the solution.

Do you know if any other change could affect the cached queries and a purge queries is necessary? 

Regards,

I am trying to use %INLIST in  SQL query using a cursor and the query fails to return results. It appears that the variable I use against %INLIST returns an empty string. All the examples I have seen use result sets and build the query as a string. Is it possible to use %INLIST in a cursor-based query? Below is a a snippet of the code I am using:

Property mylist as %String (MAXLEN="") [InitialExpression = "route1, route2, route3"];

set routeList = $LISTBUILD(mylist)

&sql(DECLARE MyReport CURSOR FOR

SELECT

      ProcessStartDate,

      ProcessCompleteDate,

      ProcessName,

     RouteName

FROM

Hello, I need help in health insight. I am trying to generate reports on deep see but i am not able to pull in the patient ids as these are our requirements for the project. Can anyone help me in unlocking this feature. Can anyone help me with link to correct documentation on how to access the edge gateways of multiple facilities to access the clinical data on sql explorer.

When using the JSON_OBJECT() function in Caché SQL on a %String property that contains JSON syntax, it converts the %String into a JSON object instead of escaping it as a string literal. How can I prevent this? (without ridiculous hacks like "add a space to the beginning of the value" as we don't always know which properties will contain these values and I certainly don't want to have to check for nulls and add/remove a space every single place this value is used in the application)

I don't want these strings automatically marshalled into JSON objects.

For example:

Hi

Is this a bug?  We came across it on an older version of Cache but I've also just tried it in version "Cache for Windows (x86-64) 2017.2.2 (Build 865U)" and got the same result.

Create a Class like so:

Greetings all,

I have a quick SQL question.  I am working with a class, which has a calculated property, which in turned indexed.
The calculation for this property is created based on another property value via: 
SqlComputeOnChange = attributes  - so basically every time I add a property attribute to my class, my new property 
is calculated based on some SqlComputeCode which calls some class method.

That initial setup works as designed.

Hi,

Most of my classes are mapped from Globals. I want to access Cache classes from a BI software through ODBC connection.

'Last update' information does not exist in most of the classes. My question is whether there is a 'last update' timestamp that is automatically generated for each line in classes I can extract to external systems?

Thanks

Hi Everyone,

I am trying to built a SSIS package thru BIDS Visual Studio 2013. My Datasource is a InterSystems Cache Database, I wanted to Import Tables records from the Datasource to MS SQL Server 2014.

As a Sanity check. I only created one Package to import one Table to MSSQL Server to try out. The connection to the InterSystems Cache Database was successful. The DSN for the InterSystems Cache Database is created in the System for 32 and 64 Bit.

Hello,

I have been trying to pull data through a linked server in SSMS from an InterSystems Cache Database for a while, this is to enable us to join the data to other source systems in our Data Warehouse.

I have set up an ODBC connection and a linked server to the database and can execute queries through OPENQUERY in Management studio, but the data is huge (> 100million rows). So when I execute a SQL query with a WHERE clause the query just spins.