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Par2: Recover() - recovering held records 1998-05-05 -- Maarten Veenstra From the help-file:
SEND(file,'RECOVER=n')
The RECOVER string, when n is greater than 0, UNLOCKs data files, RELEASEs held
records, and rolls back incomplete transactions in order to recover from a system crash.
See also Transaction Processing for Clarion Files.
n represents the number of seconds to wait before invoking the recovery process.
When n is equal to 1, the recovery process is invoked immediately. When
n is equal to 0, the recovery process is disarmed.
There are two ways of using RECOVER:
SEND(file,RECOVER=n)
OPEN(file)
This releases a lock on a file that was locked when a machine crashed. It also rolls
back a transaction that was in process when a system crashed.
SEND(file,RECOVER=n)
GET or NEXT or PREVIOUS
This removes a hold flag on a record from records that where held when a machine
crashed. Here is a piece of code that removes all hold flags from a file:
OPEN(file) !make sure no one else is using the file
SEND(file,'IGNORESTATUS=ON')
SET(file)
LOOP
NEXT(file)
IF ERRORCODE() THEN BREAK.
IF SEND(file,'HELD') = 'ON' THEN
SEND(file,'RECOVER=1')
REGET(file,POSITION(file))
END
END
RECOVER may not be used as a DRIVER string--you may only use it with the SEND
function. The SEND function returns a blank string.
Today is November 21, 2024, 8:11 am This article has been viewed 35184 times.
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