CDT with extra column

RE: CDT with extra column

aditya007 — Fri, 22 Jul 2022 10:10:14 GMT

Please refer below urls,

https://community.appian.com/support/w/kb/659/kb-1404-queryentity-fails-when-an-xsd-has-a-field-marked-as-transient

docs.appian.com/.../Supported_XSD_Elements_and_JPA_Annotations.html

RE: CDT with extra column

Harshit Bumb (Appyzie) — Fri, 22 Jul 2022 10:01:40 GMT

Yes. It is possible.
If you add the @Transient annotation, you'll be able to achieve it.
See the sample below.

Find more of such annotations here - docs.appian.com/.../Supported_XSD_Elements_and_JPA_Annotations.html

RE: CDT with extra column

paragranjan02 — Fri, 22 Jul 2022 10:01:03 GMT

Hi Kiran,

You can follow the below example to add transient columns to CDT without having them added to the database.

<xsd:element name="dummy" nillable="true" type="xsd:string">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">@Transient</xsd:appinfo>
</xsd:annotation>
</xsd:element>

Note: While you fetch data from database using query entity, it will throw error. The workaround is to use selection parameter of a!query.

Below link explains how to retrieve data if a transient column is present.

https://community.appian.com/support/w/kb/659/kb-1404-queryentity-fails-when-an-xsd-has-a-field-marked-as-transient

RE: CDT with extra column

deepakg271869 — Fri, 22 Jul 2022 08:54:57 GMT

Please share the Usecase why you are looking for this. I think, while publish the Datastore, it will throw an error and if you click on automatic option then it will create a field in DB as well.

RE: CDT with extra column

Stefan Helzle — Fri, 22 Jul 2022 08:31:36 GMT

What do you want to achieve? If this table is represented as a record, you could have a custom record field.