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  Working with the Pega 7 database
Link tables

In the Pega 7 database, the names of link tables start with the values pc_link and pr_link.

The following tables can hold instances of concrete classes derived from the Link-base class:

Table

Description

pr_link_attachment Supports the association of a work item attachment with a work item, as instances of the Link-Attachment class. Contains one row for each attachment.
pc_link_folder Supports the association of a work item with a folder, as instances of the Link-Folder class. This can be a many-to-many relation.
pr_link_work_tag Supports the association of a tag with a work item. Corresponds to the Link-Tag class. See Understanding tagging.
pc_link_topcase Supports the Link-TopCase class, which links a child case type to the top-level case type that it is associated with. Used to retrieve the parent of a child case type or to get a list of child case types.
pr_link_usecase Supports the association of an Application Specification rule with an activity, flow, or other rules that provide the implementation of that specification. Also supports the association of an Application Requirement rule with an application rule. Corresponds to the Link-Requirement and Link-UseCase classes. See About Application Specifications and About Application Requirements.
pr_link_pmf_rulechanges Supports the Link-Project class to display and report on rule changes associated with project items via the View Rule Changes link on the Project Worklist.
pr_link Not used by any standard class. Default table for instances of other Link- classes.
Definitions folder, Link- base class, child case type, top-level case type, specification
Standard rules Atlas — Initial Database Table data instances
Atlas — Standard classes derived from the Link- base class

Working with the Pega 7 database