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Further Codasyl DML facilities
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Several of the Codasyl COBOL DML statements have been discussed, or at least
mentioned in passing, in parts A1 and A2. These, and other statements and facilities are
reviewed here to give a more complete picture. The treatment is based on the 1981
Codasyl COBOL Journal of Development.
Most of the examples refer to the SKILLS subschema of Fig. A2.2, which contains the
realm SKILLS-REALM, and record types DEPT and STAFF connected by set type
AFFILIATION.
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A run unit is an individual execution of an application program (which may itself consist
of one or more interacting program modules). If ...