General Information › How CA IDMS/DB Reorg Performs Reorganization › Reorganization Controlled by Subschema and DMCL

Reorganization Controlled by Subschema and DMCL

CA IDMS/DB Reorg is also controlled by the subschema and DMCL definitions of the old and the new database. Many reorganization functions at the area, set, index, and record levels depend on how you have defined the new subschema and DMCL. By comparing the new subschema and DMCL definition to the old subschema and DMCL definition, CA IDMS/DB Reorg:

• Updates integrated indexes when member records are reorganized
• Retargets CALC records
• Retargets VIA records
• Expands or reduces an area's page range
• Expands or reduces an area's page size
• Expands or reduces a record's page range
• Changes a record's location mode
• Moves a record to another area

Concepts includes details about these subschema-controlled reorganization capabilities.

Note: All records in the old subschema and all records in the newsubschema must be assigned to the same page group.