Team, I have a database view already created. I am now trying to crea

Define a primary key to the cdt xsd file using @id to define primary key.. If you do not define any primary key.. Appian automatically creates a primary key with name a_id.. Remove the previous table and publish the xsd again with primary key defined..

@manikandang You need to do two things here:
1. Provide the name of the database view to the 'name' attribute of @Table annotation.
2. Provide the name of the column (which ever you feel is sufficient to uniquely identify a record) in your view to the 'name' attribute of the @Column annotation and designate this element with @Id annotation.

Also please remember that there may not be a need to drop the view (Assuming that a working View is in place) because if the XSD doesn't map to the database entity it means that there is a problem with XSD, and we should try rectifying the problem in same.

Here's an example of how you may do it:





@Table(name="nameOfDatabaseView")





@Id @Column(name="nameOfUniqueIdColumnInDatabaseView")


\ t<--\tOther columns goes here\t-->




And if you didn't make a search prior to posting, I would like to suggest to do so, as I remember there are some posts which resembles your query.

Here's a link to some documentation on creating your XSD:
forum.appian.com/.../Custom_Data_Types_from_XSD.html
Check out the "<xsd:element name="id" type="xsd:int">" tag for an example of a primary key definition.

This is what we do to overcome this issue:
1) Add rownum as a column in the view (eg CREATE VIEW <viewname> AS SELECT rownum ROW_ID, <other required columns>...)
2) In XSD, use @Table annotation to point to this View and designate the ROW_ID column with @Id annotation