Discovers ALL IS-A child entities that have records with the given primary key value. Used for overlapping subtype parents (AllowMultipleSubtypes = true) where multiple children can coexist. The server executes a single UNION ALL query across all child entity tables for maximum efficiency.
The parent entity name to check children for
The primary key value to search for in child tables
Array of child entity names found (empty if none)
Discovers which IS-A child entity, if any, has a record with the given primary key value. The server executes a single UNION ALL query across all child entity tables for maximum efficiency.
The parent entity name to check children for
The primary key value to search for in child tables
The child entity name if found, or null with Success=true if no child exists
Resolver for IS-A entity hierarchy discovery.
Provides GraphQL endpoints for client-side code to discover child entity records in an IS-A hierarchy. This enables bidirectional chain construction where a loaded entity discovers its more-derived child type.