DL/I and CA IDMS/DB › DL/I Commands › Basic Operations

Basic Operations

The basic DL/I commands are:

• GET UNIQUE (GU) ── Retrieves a named segment occurrence (direct retrieval)
• GET NEXT (GN) ── Retrieves the next segment occurrence in the hierarchical access path
• GET NEXT WITHIN PARENT (GNP) ── Retrieves the next segment occurrence under the current parent occurrence
• GET HOLD UNIQUE (GHU) ── Same as GU, but permits a subsequent DELETE or REPLACE
• GET HOLD NEXT (GHN) ── Same as GN, but permits a subsequent DELETE or REPLACE
• GET HOLD NEXT WITHIN PARENT (GHNP) ── Same as GNP, but permits a subsequent DELETE or REPLACE
• REPLACE (REPL) ── Updates an existing segment occurrence in the database
• INSERT (ISRT) ── Inserts a new segment occurrence in the database
• DELETE (DLET) ── Deletes an existing segment occurrence and all of its dependents