DL/I Calls in CA IDMS/DB

DL/I Database Calls

CA IDMS DLI Transparency supports all of the DL/I database calls and all of the DL/I command codes shown in the tables below.

DL/I Command Codes

Code	Purpose
C	Allows use of concatenated keys in SSAs
D	Specifies path calls (that is, allows retrieval, modification, or insertion of several segments with one call)
F	Permits search for a segment to start at the first occurrence under its parent, regardless of positions.
L	Causes the last occurrence of a segment type to be used in satisfying a call
N	Prevents the replacement of the specified segment(s) following a path retrieval call
P	Establishes parentage at the specified level when used with a retrieval call
U	Maintains current positioning at the specified level
V	Maintains current positioning at all levels higher than the specified level
- (null command code)	Causes no special processing to occur

Extensions to Basic Calls

As extensions to the basic calls shown in the DL/I command codes table above, CA IDMS DLI Transparency also supports:

Path calls ── Calls used to retrieve, modify, or insert multiple segments in a hierarchical path.
Qualified and unqualified calls ── Calls specified with or without segment search arguments (SSAs).
Qualified and unqualified SSAs ── SSAs with qualification statements or qualified by segment type only.

DL/I System Service Calls

The following DL/I system service calls are also supported under CA IDMS DLI Transparency: