CA IDMS/DB Schema and VSAM File Correspondences › Alternate Index › Location Mode Options
Location Mode Options
A record can have only one location mode in CA IDMS/DB. You can choose one of the location mode options described earlier in this section for the base KSDS or ESDS record. Or, if an alternate index exists, you can choose one of the following location mode options for the base record:
- VIA (the alternate index set) stores records in physical alternate key sequence. This option may be used for sequential processing through the alternate index.
- CALC (on alternate key) stores records by using a randomizing algorithm on the alternate key. This option may be used for direct retrieval through the alternate key.
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