Rational Developer for System z, Version 7.6

Segment call

To display the details of the Segment Call section, you must select a Segment call in the list of called Elements. For files and databases represented by Segments, you indicate sort key, occurs and Redefines options in this section. You also access to the Segment editor tabs.

Note: Keep in mind that a Segment call is considered as an elementary Data Element.
Sort key
This field identifies all data elements that might be used as control break sort keys, or as access keys to a file, a database or a Pactables table.

Note: It is highly recommended to dedicate a Segment to only one type of use. Each data element that may belong to a sort key must be referenced by a unique alphabetic or numeric character. It is recommended to reference the indicators by a series (1, 2, 3 ...). The actual sort sequence will be chosen at the program level (on the Call of Data Structures (-CD) screen) by sequencing the characters in the appropriate order.
Don't forget that the format of key group data elements must have been entered in the Dictionary or at the segment level.
Value Comments
U References the access key for a VisualAge Pacbase table. This value must be indicated on the group data element if it is a group key.
S Indicates that the data element belongs to at least one sub-system.
Values Comments
U References a unique key for an DL/1 database.
M References a multiple key for an DL/1 database.
1 to 9 Secondary index All other values designate a search field.
Values Comments
0 to 9 AS400 physical file key. Relational databases
V Variable length column
Blank Fixed length column
W For DB2 SQL, SQL/DS and ORACLE, generation of a variable length column (VARCHAR).
L For DB2 SQL, SQL/DS and ORACLE, generation of a LONG VARCHAR.
Note: Sort keys are not allowed on data elements redefining other data elements.
Redefines
The Data Element containing this option redefines the Data Element of the same COBOL level which precedes it in the Segment description. If a Data Element which redefines another Data Element is contained in a group, it is considered to be an elementary Data Element. It must be taken into account in the calculation of the number of Data Elements contained in a group (except for DL1 database Segments).

More

Click theMore... button to open a dialog box in which you indicate the presence check values for the Segment called in the current Segment.

-G Lines

Click the -G Lines... button to optionally define -GC lines, -GE lines, and -GG lines for the Segment called in the current Segment.

Clicking the buttons in the bottom part of the section, switches the editor of the Segment called, in the corresponding tabs:

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