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Hi community,

We have a usecase to set a property's value automatically: based on several conditions that property gets a value. First we considered creating a desktop plan for this. Then we figured it would be preferrable to have this value set automatically, something that can possibly be accomplished by applying computed content.

We have used computed content before, mainly for concatenating values (like described in Computed Content: Show attribute values based on existing attributes (ataccama.com)). But in this case we would need to define a case statement to define the conditions and determine the value.

So the question is, does someone know if sql-like case stamenent can be implemented as computed content? And if so, can an example be provided?

Thanks for your attention and kind regards,

Albert

Hello @Albert de Ruiter,

Yes, sql-like case stamenent can be implemented as computed content. See below a simple example of a computed content property for Catalog Item entity, serving a purpose of defining a status whether it is reviewed by Data Steward or not based on the description property.

 

 

Catalog Item when description is null, custom property shows “PENDING”.

 

 

Catalog Item when description is not null, custom property shows “READY”.

 

Configuration of Catalog Item entity in Metadata Model

Configuration of the computed content entity:

Here is the SQL query:

select
a.id_i ,
a.parent_id_i,
a.from_h ,
a.path_i ,
a.type_i ,
case
when catalogitem_description is null then 'PENDING'
else 'READY'
end as status,
concat( 'https://mdm-server-one-fyg1u.worker-01-euc1.prod.ataccama.link/runWorkflow?id=WF1:export_all_instance.ewf&inputId=', a.id_i) as url
from
(
select
ci.$ci_id$ as id_i ,
ci.$ci_id$ as parent_id_i,
ci.$ci_from$ as from_h ,
$path(ci.$ci_path$)$ as path_i ,
$type()$ as type_i ,
ci.$ci_name$ as catalogitem_name,
ci.$ci_def$ as catalogitem_description,
ci.$ci_id$ as catalogitem_gid
from
$ci$ ci
) as a

 

Hope this helps! If you have any questions, let me know in the comments below!


Hi @abir ,

Thanks for your example. I'll give it a try to make it fit our usecase. Likely I will have a follow-up question about joining tables, which works different as compared to regular SQL, because in our usecase the case statement will use logic involving several entities. But I will give it a shot myself first.

Kind regards,

Albert


Hi @Albert de Ruiter 

You’re welcome! And joining multiple entities is also doable. Here is another example where entities are joined together.

select id_i, parent_id_i, from_h, path_i, type_i, 
concat(
'https://ataccama.atlassian.net/jira/secure/CreateIssueDetails!init.jspa?pid=10000&issuetype=10005&labels=AccessRequest&summary=Access%20Request%20for%20',
catalogitem_name,
'%20from%20',
connection_name,
'&customfield_10033=',
schema_name,
'&customfield_10034=',
catalogitem_name,
'&customfield_10035=',
owner,
'&customfield_10037=https%3A%2F%2Fone.local.ataccama.pro%2Fcatalog%2Fdata%2FcatalogItem%2F',
catalogitem_gid,
'%2F&customfield_10038=',
connection_name,
'&description=Hi%2C%0A%0ACould%20I%20please%20get%20access%20to%20',
catalogitem_name,
'%20from%20',
connection_name,
'%3F')
as url from
(select
ci.$ci_id$ as id_i,
ci.$ci_id$ as parent_id_i,
ci.$ci_from$ as from_h,
$path(ci.$ci_path$)$ as path_i,
$type()$ as type_i,
l.$l_name$ as schema_name,
c.$c_name$ as connection_name,
p.$p_username$ as owner,
ci.$ci_name$ as catalogitem_name,
ci.$ci_id$ as catalogitem_gid
from
$ci$ ci
left join $l$ l on l.$l_id$ = ci.$ci_pid$
left join $c$ c on c.$c_id$ = ci.connection_ri
left join $p$ p on p.$p_id$ = ci.owner_ri) as a

 

 


Hi @abir ,

I wanted to apply your input, but I ran into the following. One of the entities that I need in the computed content is an extension of term. When trying to add this it cannot be selected (not visible in the dropdownbox). I can see term itself, but none of the extensions of term that I created. Is that expected behaviour (version 13.9)? Otherwise I'll contact support.

Kind regards,

Albert


I have contacted Support about the last question. I will update this post when I have more clarity.


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