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X 4.2.13 LOCK MODE Clause (OS/2 VSAM Files Only)




X >_Host_> On OS/390 and VM, the LOCK MODE IS AUTOMATIC clause is invalid.
X <_Host_<


X >_Workstation_> The LOCK MODE IS AUTOMATIC clause is only supported by the
X VSAM file system running on OS/2.


X The LOCK MODE IS AUTOMATIC clause is treated as a comment on:


X For OS/2 VSAM files, record locking is not supported for files that reside
X on an OS/2 LAN server. Files residing on OS/2 LAN servers are opened
X shared read or exclusive write. <_Workstation_<


X The LOCK MODE clause specifies whether a file is in exclusive or shareable
X mode. A file in exclusive mode is open to one file connector only. A
X file in shareable mode is available to any number of file connectors that
X do not require exclusive mode.


X A file is in exclusive mode if the LOCK MODE clause is omitted (as long as
X the file is not opened for input).


X A file is in shareable mode when it is opened for input or when the LOCK
X MODE IS AUTOMATIC clause is specified and is supported.


X Do not specify the LOCK MODE IS AUTOMATIC clause if the file is specified
X in a USING or GIVING phrase of a SORT or MERGE statement.


X The WITH LOCK ON RECORD phrase is for documentation purposes only.

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