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COMMIT
Perform a solid-disk write for all active work areas
------------------------------------------------------------------------------
Syntax
COMMIT
Description
COMMIT is a database command that flushes CA-Clipper buffers and
performs a solid-disk write for all work areas with open database and
index files. The solid-disk write capability is available under DOS
version 3.3 and above. Under DOS 3.2 or less, COMMIT flushes CA-Clipper
buffers to DOS.
In a network environment, issuing a GO TO RECNO() or a SKIP0 will flush
CA-Clipper's database and index buffers, but only a COMMIT will flush
the buffers and perform a solid-disk write. Thus to insure updates are
visible to other processes, you must issue a COMMIT after all database
update commands (e.g., APPEND, REPLACE). To insure data integrity,
COMMIT should be issued before an UNLOCK operation. Refer to the
"Network Programming" chapter in the Programming and Utilities Guide for
more information on update visibility.
Notes
. COMMIT uses DOS interrupt 21h function 68h to perform the
solid-disk write. It is up to the network operating system to
properly implement this request. Check with the network vendor to
see if this is supported.
Examples
. In this example, COMMIT forces a write to disk after a series
of memory variables are assigned to field variables:
USE Sales EXCLUSIVE NEW
MEMVAR->Name := Sales->Name
MEMVAR->Amount := Sales->Amount
//
@ 10, 10 GET MEMVAR->Name
@ 11, 10 GET MEMVAR->Amount
READ
//
IF UPDATED()
APPEND BLANK
REPLACE Sales->Name WITH MEMVAR->Name
REPLACE Sales->Amount WITH MEMVAR->Amount
COMMIT
ENDIF
Files Library is CLIPPER.LIB.
See Also:
DBCOMMIT()
DBCOMMITALL()
GO
SKIP
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