Promotion Support Facilities › NDVRDCOR Correlation › Target System Impact Analysis Rules

Target System Impact Analysis Rules

During execution of the Correlation Processor (program NDVRDCOR), the target system CCDB and IDD are examined to determine if any modifications have been made to the target dictionary that might conflict with the entity changes migrating in. The entities examined fall into three general categories:

• Entities contained in the migration list, which have been modified at the target since last being migrated.
• Entities, which are closely related to, those contained in the entity list, and which have changed since last migrated from the source.
• Entities, which are closely related to those, contained in the entity list, and whose presence will prevent the migration from succeeding (BUILDER CODE violations).

NDVRDCOR always checks for entities in the first category. It does so by inspecting the target CCDB. NDVRDCOR accepts an EXPAND IDD RELATIONSHIPS command. If specified, the program will check for entities in the last two categories. Entities in the first category are printed in the MIGRATION ENTITY EXCEPTIONS report produced by NDVRDCOR, entities in the second category are printed in the EXPANSION ENTITY EXCEPTIONS report, and those in the third category are printed in the TARGET ENTITY EXCEPTIONS report.

The following table identifies the relationships examined in the target system for impact analysis when the EXPAND IDD RELATIONSHIPS command is specified. For each Entity Type, the Related Entity will be Exception Listed if it has been modified in the target system since it was last migrated from the source system.