20. Writing 4GL Statements : Call Statements
 
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Call Statements
4GL call statements transfer control away from the current frame to any of five levels:
Another frame
A 4GL or 3GL procedure that can include embedded query language statements or a database procedure
Another 4GL application
An Ingres tool, such as QBF
The operating system
The 4GL call statements are:
callframe
callproc
call application
call subsystem
call system