Using IBM Application Development Tools for z/OS and OS/390

Chapter 2. Introducing File Manager 77

Figure 2-77 Database positioning panel

We have deselected all segments except the SHIRE segment by placing an ‘X’ against each.

Deselection could also have been accomplished by:

򐂰 Entering ‘X4’ against SHIRENP

򐂰 Entering ‘XX’ against SHIRENP and ‘XX’ against LETRBOX

򐂰 Entering ‘X*’ against SHIRENP

By returning to the database positioning panel and entering E against the SHIRE segment, we

get the Segment Layout Selection panel as shown in Figure 2-79.

Figure 2-78 Segment Layout Selection panel

78 Using IBM Application Development Tools for z/OS and OS/390

By specifying E in the Cmd field, we are able to enter Field Selection Criteria for the SHIRE

segment as shown in Figure 2-79.

Figure 2-79 SHIRE segment layout

Through similar steps, we specify selection criteria for the SHIRE-TOWN and SHIRE-CITY

segments as shown in Figure 2-80 and Figure 2-81.

Figure 2-80 SHIRE-TOWN segment layout

Chapter 2. Introducing File Manager 79

Figure 2-81 SHIRE-CITY segment layout

Returning to the Segment Layout Selection screen, we now see the short message

‘Retrieving with qual SSA’ in the top right hand corner — that is, we have completed entry of

field selection criteria for the SHIRE segment — as shown in Figure 2-82.

Figure 2-82 Completed SHIRE segment field selection

At this point, we decide that we still need to be more granular with the selection. We return to

the Database Positioning panel and reselect the LETRBOX segment as shown in Figure 2-83.

80 Using IBM Application Development Tools for z/OS and OS/390

Figure 2-83 Database Positioning pane

Now the SHIRE segment is again selected (S in the Cmd field), giving a display starting with

the first segment (ESPERANCE) that satisfies our selection criteria. This is shown in

Figure 2-84 and Figure 2-85.

Figure 2-84 SHIRE segment selected

Chapter 2. Introducing File Manager 81

Figure 2-85 ESPERANCE segment

To add further selection criteria, we edit the LETRBOX segment by entering an E against it in

the Database Positioning panel. We can now enter the selection expression for the

LETRBOX segment, as shown in Figure 2-86.

Figure 2-86 LETRBOX segment selected

Returning to the Database Positioning panel, we enter S against the SHIRE segment, noting

that selection starts from the ESPERANCE SHIRE segment, as shown in Figure 2-87.