$View

The $VIEW function returns:

• The value of a parameter (system, file, or user) to the request
• File parameters

While $VIEW works for all viewable parameters in local context, it does not work for some file parameters in remote context.

• Size and use of journal and checkpoint streams

Syntax to view a parameter value

The format of the $VIEW function to view parameter values is:

$VIEW(parameter[,name])

where:

• parameter is a character string that represents the name of a viewable Model 204 parameter or other information. For example:

$VIEW('ERASE')

returns a value of @ if the ERASE parameter is set to the character @. If the parameter name is invalid or the user is not authorized to display parameter values for the file, a null string is returned.

• name overrides the default file or group context for the function. The format for this argument is:

[[FILE | [PERM | TEMP] GROUP] name | $CURFILE | $UPDATE] [AT location]

If this argument is omitted or null, the default context is the context of the statement containing the function. Thus, a default context is required for this function.

You can specify $CURFILE as the name argument in place of a file/group name.

Viewing file-specific information

In addition to viewable parameters, the following file-specific information can also be viewed with $VIEW:

Name used with $VIEW	Description
DTSLBOPR	Date and time transaction was backed out during roll forward (for TBO files) Date and time partial transaction was applied during roll forward (for non-TBO files)
DTSLCHKP	Date and time of last checkpoint rolled back to. Will be blank if the file has also been rolled forward.
DTSLRCVY	Date and time of last recovery
DTSLUPDT	Date and time of last update
DTSLDKWR	Date and time of last DKWR
DTSLRFWD	Date and time of last roll forward
FIWHEN	Date and time FISTAT was reset
FIWHO	Terminal ID that reset FISTAT

For example:

$VIEW ('FIWHEN')

returns:

FIWHEN 94.257 SEP 14 16.40.45. DATE AND TIME FISTAT WAS RESET

Syntax for viewing statistics fields

The first argument is the category, SLSTATS, SYSSTATS, or USRSTATS. The second argument is the name of the Statistic field to return. See the Rocket Model 204 System Managers Guide for the name of the statistics fields.

$VIEW(category, field-to-return)

Where the following categories and fields are valid:

Valid categories and fields with $VIEW

Category	Statistics field-to-return	Equivalent-to or returns-value-of
'SLSTATS'	'USERID'	$USERID
'SLSTATS'	'ACCOUNT'	$Account
'SLSTATS'	'SUBSYSTEM'	$SUBSYS with no argument
'SLSTATS'	'LAST'	LAST=field
'SLSTATS'	'PROC-FILE'	Current procedure file
'SLSTATS'	'PROC'	Current procedure
'SLSTATS'	'sl statistics name'	Statistics field
'SYSSTATS'	'system stat name'	Statistics field
'SYSSTATS'	'DKBM stat name'	Statistics field
'USRSTATS'	'user stat name'	Statistics field
'USRSTATS'	'conflict ctr name'	Statistics field

Usage

The time related Since Last statistics fields, CNCT, CPU, SCHDCPU, and STCPU, are not valid during evaluation time.

Specifying an invalid statistics field name returns a null value with the message:

M204.1463: INVALID PARAMETER: fieldname

Syntax to view the size and use of journal and checkpoint streams

The format of $VIEW for the use and size of journal and checkpoint streams is:

$VIEW('CCAJRNL'|'CCAJLOG'|'CHKPOINT'|'CHKPNTS')

Specify the following:

%STRING = $VIEW('CCAJRNL'|'CCAJLOG'|'CHKPOINT'|'CHKPNTS')

$VIEW returns a string that describes the usage of the specified stream with the following character format:

Describes	LENGTH	Displays
In use DDNAME	8	Alphanumeric characters
Percentage used	4	Integer with percentage sign
Maximum size	9	Number of tracks
Current size	9	Number of tracks
Unused spaces	2	Number of tracks
VOLSER	6	Alphanumeric characters
Separating back slash	1	A back slash
Data set name	Variable	Data set name
Separating back slash	1	A back slash
Generation number	Variable	Generation number with a leading plus sign

You must ensure that the %variable being used to hold the requested information is defined as STRING LEN 80 or greater, for example:

%STRING IS STRING LEN 80 BEGIN %STRING = $VIEW('CCAJRNL') PRINT %STRING END CCAJRNL 0% 37 0 0SU000\OHIO1.ONLINE.JOURNAL