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Career Advice AT SELECTION-SCREEN
Point after processing user
input on the selection screen
while the selection screen is
still active
The event keyword AT SELECTION-SCREEN provides you with several possibilities to
carry out processing blocks while the system is processing the selection screen.
START-OF-SELECTION
Point after processing the selection
screen
The event START-OF-SELECTION gives you the possibility of creating a processing
block after processing the selection screen and before accessing database tables using
a logical database. You can use this processing block, for example, to set the values of
internal fields or to write informational statements onto the output screen.
At the START-OF-SELECTION event, also all statements are processed that are not
attached to an event keyword except those that are written behind a FORM-ENDFORM
block
GET <table>
Point at which the logical database
offers a line of the database table
<table>.
The most important event for report programs with an attached logical database is the
moment at which the logical database program has read a line from a database table
(see Accessing Data Using Logical Databases ). To start a processing block at this
event, use the GET statement as follows:
Syntax
GET <table> [FIELDS <list>].
After this statement, you can work with the current line of the database table <table>.
The data is provided in the table work area <table>.
GET <table> LATE
Point after processing all tables which
are hierarchically subordinate to the
database table <table> in the structure of
the logical database.
To start a processing block at the moment after the system has processed all database
tables of a logical database that are hierarchically inferior to a specific database table,
use the event keyword GET as follows:
Syntax
GET <table> LATE [FIELDS <list>].
In analogy to report programs that use only SELECT statements (see table in
Comparison of Access Methods ), the processing block of a GET <table> LATE
statement would appear directly before the ENDSELECT statement in the SELECT loop
for the database table <table>.
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