HP 3000 Manuals

COBOL/HP-UX Language Reference for the Series 700 and 800

Microsoft V2.0 Additional Syntax Support 

Record LOCKING 

Function 

If you set the MS directive, the LOCKING clause in the SELECT statement
is supported.

General Format 


            

General Rules 

   1.  For SEQUENTIAL and LINE SEQUENTIAL files only EXCLUSIVE locking is
       allowed.

   2.  If MANUAL is specified multiple locks can be applied to the file.

   3.  If AUTOMATIC is specified a single lock is applied automatically
       to the current record.

   4.  For SEQUENTIAL and LINE SEQUENTIAL files the default LOCKING mode
       is EXCLUSIVE.

   5.  For RELATIVE and INDEXED files the default LOCKING mode is
       AUTOMATIC.

   6.  If the MANUAL option is specified the UNLOCK statement will
       release all locks.

OPEN LOCKING Statement 

If you set the MS directive the LOCKING clause in the OPEN statement is
supported.


            

General Rules 

   1.  For SEQUENTIAL and LINE SEQUENTIAL files only EXCLUSIVE is
       allowed.

   2.  If NO LOCKING phase is specified EXCLUSIVE is implied.

READ Statement (in Manual mode) 

If you set the MS directive, the WAIT clause in the READ statement is
allowed and treated as documentary.

     READ file-name [NEXT] RECORD [LOCK] [WAIT] [ INTO identifier]

START Statement 

If you set the MS directive the LOCK and WAIT clauses in the START
statement are allowed and treated as documentary.

     START file-name [LOCK] [WAIT] . . .

UNLOCK Statement 

The UNLOCK statement removes all locks from a file.


            

MPE/iX 5.0 Documentation