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CHECK - processing_block

Quick Reference

Syntax

CHECK log_exp.

Effect

If the statement CHECK is located outside a loop and log_exp is false, the statement terminates the current processing block. Any logical expression can be specified for log_exp.

After the processing block is exited, the runtime environment proceeds in the same way as when the processing block is exited in the normal way (with the exception of the event block LOAD-OF-PROGRAM and the reporting event block GET). In particular, the output parameters of procedures are passed to the bound actual parameters.

• The event block LOAD-OF-PROGRAM cannot be exited using CHECK.
  
  
• After the reporting event block GET is exited using CHECK, subordinate nodes in the hierarchical structure of the associated logical database are no longer processed. The logical database reads the next row of the current node or next higher node, if it has reached the end of the hierarchy level.
  

Programming Guideline

Only use RETURN to exit procedures

Notes

• In a procedure (method, function module, subroutine), CHECK log_exp works outside a loop in the same way as:
  

IF NOT log_exp.
  RETURN.
ENDIF.

• A further variant of the statement CHECK for exiting processing blocks is CHECK SELECT-OPTIONS that can only be used in GET event blocks for logical databases.