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Update query for Digital points

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scott11davis
Cadet
0 Likes
7
1664

Update query for Digital points

Is it possible to use Update query to Update one of the Identification property of a Digital point.

But I am not able to do it

 

I used

UPDATE CDBOUTSTATION

SET Description = Newsite

WHERE

ID='10000'

 

The error i get is The query statement is malfunctioned or invalid. Column Newsite not found..... Equality operation '=' cannot be used with Integer and String.

 

Is it possible to use Update for Strings ?

7 Replies 7
AndrewScott
Commander
Commander
0 Likes
6
1656

Re: Update query for Digital points

The first error "Column Newsite not found." is occurring because Newsite is missing the enclosing single quotes to make it a string literal (assuming Description is a string field).

The second error "Equality operation '=' cannot be used with Integer and String." is occurring because the ID column is an integer but the value it is being compared with is a string literal (it is enclosed in quotes).

The updated query is:

 

UPDATE CDBOUTSTATION
SET Description = 'Newsite'
WHERE
ID=10000

 

 


Andrew Scott, Lead Engineer, AVEVA
scott11davis
Cadet
0 Likes
5
1653

Re: Update query for Digital points

I tried other way as well.

The error i get for that is

The results cannot be displayed. 

DML statements not supported from lists

AndrewScott
Commander
Commander
0 Likes
4
1649

Re: Update query for Digital points

A list in ViewX (or WebX) is used to display the result set from a query so requires a SELECT statement.

 

To execute DML statements (UPDATE, CREATE or DELETE) you need to use a different application. The Query Pad tool that comes with ClearSCADA can be used for this purpose.


Andrew Scott, Lead Engineer, AVEVA
sbeadle
Janeway Janeway
Janeway
0 Likes
3
1646

Re: Update query for Digital points

Look up QueryPad in the help.

Enter query in the lower pane.

Hint - hold Ctrl key down when pressing Enter to execute a query.

scott11davis
Cadet
0 Likes
2
1575

Re: Update query for Digital points

It does work but I used Point ID to update. I wanted to update the Description of a point, But  it had cleared other point descriptions on the same template except the one which I wanted to update. I tried several ways to check it but nothing helped and now I have to manually or use update query to update other points on the same template. And it does not throw up any error.

 

Hardin4019
Lieutenant
Lieutenant
0 Likes
0
1566

Re: Update query for Digital points

If the Point you are trying to update is in an Instance of a Template, is the Attribute of that Point you are trying to update included in the Property Overrides of the Template? If not, you could change the attribute in the template to say "Newsite", then it will be set to all of the instances.

 

If the Point Attribute is already included in the Property Overrides of the Template, then only new Instances of the original Template would say this. Which is likely part of what you would like to happen.

 

To go back and fill in the attribute on Instances of the Template where the Property Override for the Attribute is already turned on and the Attribute is blank for many of the Instances, you likely need to take a slightly different approach.

 

One way I have updated Point.objDescription attributes is to setup a Function Block Diagram set to an interval of 0 seconds in the Template, then map out somewhere that has the objDescription I desire, or even a Constant in the FBD, to the Point.objDescription. Then there are two ways to execute all of the FBD's, either manually one at a time, or by creating a Structured Text program that finds all of the FBD's of a particular name and executing them.

 

The second way is much like the ST program mentioned just above for executing a FBD with the time interval set to 0 seconds. Write a ST program with a Query in it that will find all of the Instances of a particular template, and will update the Point.Attribute. Of course some care needs to be taken in setting up the query to not update Instances of the Template you don't want it to. For instance having the ST Query only return results where the Point.Attribute is empty, or in a specific Group, etc.

BevanWeiss
Spock
Spock
0 Likes
0
1558

Re: Update query for Digital points

I think you should just tell us what it is you're ultimately trying to do.

Only giving us a small part of the puzzle results in us giving you the wrong puzzle solution.

 

 

If I were to guess, you want to update all instances of a point (which derives from a template site/device) so that some aspect of the point description will relate back to the site in which it is actually contained.  Correct?

 

So the way that I would do this is:  QueryPad

 

If you have your template like

SiteTemplate

 -> Devices

   -> Pump 1

     -> Running

 

and you want the Running point Description to be updated to say 'Site Name - Pump 1 - Running'

Then you could do this as (@sbeadle no SQL code entry 😞 )

UPDATE CDBPoint

SET Description = ParentGroupId->ParentGroupId->ParentGroupId->Name || ' - ' || ParentGroupId->Name || ' - ' || Name

WHERE Name='Running'

AND ParentGroupId->ParentGroupId->ParentGroupId->TemplateId=[MAGIC NUMBER]


Lead Control Systems Engineer for Alliance Automation (VIC).
All opinions are my own and do not represent the opinions or policies of my employer, or of my cat..