Overview of the CA IDMS TOTAL Transparency › Conversion of Total Data Structures to CA IDMS/DB › Total Linkpaths Relate to CA IDMS/DB Sets

Total Linkpaths Relate to CA IDMS/DB Sets

Identifies Existing Relationships

When converting a Total database to a CA IDMS/DB database, the transparency uses Total linkpath information to identify each relationship that exists among given Total files. For each such relationship found in Total DDL, the transparency defines a set in the generator-produced CA IDMS/DB schema and subschema.

Converting to a Set

When converting a linkpath to a set, the transparency does the following:

• Designates the Total master file as the owner record type
• Designates the associated Total variable file as the member record type
• Establishes appropriate pointers from the linkpath fields used to relate a master file to a variable file and to chain records in a variable file

PRIOR Set Order is Assigned

The transparency assigns a set order of PRIOR to each CA IDMS/DB set established. It assigns a set membership option of MANDATORY AUTOMATIC for the primary linkpath and a set membership option of MANDATORY MANUAL for all other CA IDMS/DB member record types that it describes in the schema.

Note: For more information about the CA IDMS/DB set order and set membership options, see the CA IDMS Database Administration Guide.

Records in a Total variable file are stored via the CA IDMS/DB set established to correspond to the primary linkpath for that file.