Tandem ENFORM 058057, Reference Manual

Page: 82 / 312

DELINK Statement
Statements
058057 Tandem Computers Incorporated
4–11
DELINK Statement
The DELINK statement allows you to clear a connecting relationship between
dictionary record descriptions. The syntax of the DELINK statement is:
DELINK






record-name1 [ TO [OPTIONAL] ]
record-name2 VIA field-name
qualified-field-name1 [ TO [ OPTIONAL ] ]
qualified-field-name2
, ... [;]
record-name1
or
record-name2
are the names of dictionary record descriptions.
field-name
is the name of a field common to both of the record descriptions.
qualified-field-name1
or
qualified-field-name2
are the names of fields uniquely identified as components of record-name1 and
record-name2 respectively.
Both forms of the DELINK statement are equivalent. The field names must be
specified in the DELINK statement in the same order as the corresponding LINK
statement. For example, if the LINK statement is:
LINK parts TO odetail VIA partnum;
the corresponding DELINK statement can be:
DELINK parts.partnum TO odetail.partnum;
ENFORM stores all links of record descriptions in the current ENFORM internal table.
All links apply to all subsequent LIST or FIND statements of the current ENFORM
session until you issue a DELINK, CLOSE, DICTIONARY statement, or
?DICTIONARY command. Since unnecessary links can produce undesirable results,
delete relationships which do not apply to the current query from the internal table.
Use a DELINK statement to clear a a linking relationship between two record
descriptions without affecting other links.
If you want to clear all links, use a CLOSE statement, a DICTIONARY statement, or a
?DICTIONARY command. A CLOSE statement for a record description deletes all
links referencing that record description from the internal table. A DICTIONARY
statement or ?DICTIONARY command clears the entire internal table.