$FunLoad
Fast/Unload records in Model 204 list or found set
Note: Many $functions have been deprecated in favor of Object Oriented methods. The OO equivalent for the $Funload function is the FastUnload function in the Recordset class
This function requests an unload of the data in a Model 204 list or found set using Fast/Unload. If Fast/Unload is not installed at your site, this function returns a -1 error code.
$FunLoad accepts six arguments, as explained below.
Syntax
%result = $FunLoad(found_set, funin, funprint, funout, [parms], [timelimit])
| %result | This numeric variable is set to the return code from Fast Unload, to the positive request number for asynchronous requests, or to a negative number if Fast/Unload is unable to process the request. |
|---|---|
| found_set | A string that identifies a found set or a list. This is a required parameter. If you want to unload records in a found set created with a FIND statement, pass the label of the found set as the found_set argument. To unload the records in a list, specify the name of the list as the found_set argument.
If you have a FIND statement label and a list with the same name, $FunLoad will use the FIND statement label, unless you explicitly specify that you want to unload a list by preceding the name of the list with the word declare list data in bigfile data: in bigfile find all records for which . . . end find fun1: %rc = $funload('DATA',...) fun2: %rc = $funload('LIST DATA',..) Model 204 FIND statement record locking protects the record sets you are unloading. For jobs where data consistency is critical, reorganizing a file, for example, this record locking is essential. For jobs that can tolerate some inconsistent data, like certain report creation, unlocked record sets (FIND WITHOUT LOCKS) may be suitable. You cannot unload records that are not in a found set or a list. For example, you cannot unload a sorted record set (although you can use sorted output in the FUEL program that $FunLoad runs, as described in Fast/Unload Extraction Language (FUEL)). |
| funin | The identifier of a $list, or it is the DDname of an input program. This argument corresponds to FUNIN in batch mode Fast/Unload. This is a required parameter. |
| funprint | The identifier of the $list that is to receive the Fast/Unload report data, or it is the DDname of a file that is to receive the Fast/Unload report data. Note that if you specify the ASYNCH parameter, you cannot specify a $list identifier for this argument. This argument corresponds to FUNPRINT in batch mode Fast/Unload.
If this parameter is not specified, all report data will go to the Fast/Unload audit trail. |
| funout | Corresponds to FUNOUT in batch mode Fast/Unload; specifies the destination for the output data. This argument is required, and it may be one of the following:
Processing of this argument depends on the Fast/Unload version:
|
| parms | A string that specifies the Fast/Unload parameters. This string can contain any of the parameters allowed on the PARM option on the EXEC card for batch mode Fast/Unload and can, in addition, contain the parameters ASYNCH, ALLMSG and NOTIFY. The description of parameters in Fast/Unload program parameters shows the default parameter values, showing any differences when invoked via the Fast/Unload SOUL Interface. |
| timelimit | A number indicating the maximum amount of time in seconds that the request is to be allowed to complete. If the $FunLoad request does not complete within this time, the $FunLoad request is immediately cancelled. The SOUL request is not cancelled in such a case, but, for synchronous requests, $FunLoad returns a 32. This is an optional argument and, if not specified, defaults to the FUNMAXT system parameter setting.
An explicit or default value of 0 means that there will be no time limit placed on the request. Note: The time limit includes the time waiting for the request to actually be run by a Fast/Unload task, so a request could time out because of other long-running requests tying up the Fast/Unload tasks. |
Return codes and error messages
These are the return codes:
-1 - Fast/Unload PST not available -2 - Input/report/output DDname in use -3 - Ran out of CCATEMP or free storage -4 - Input/report/output DDname not found -5 - Required parameter not specified -11 - Invalid found set specified -12 - Invalid input/report/output descriptor specified -13 - Conflicting parameters
In addition to the above error codes, if $FunLoad discovers that a required capability is not supported by the version of Fast/Unload in use, the SOUL request is cancelled with an error message indicating the missing capability. If any missing capabilities that would prevent successful $FunLoad operation are discovered during Model 204 initialization, an operator warning is issued and saved in the VIEW ERRORS table, so that corrective action may be taken in advance.
If the X'01' bit is set in the system FUNPARM parameter, the request is cancelled if a $FunLoad is issued in the middle of an updating transaction. Whether or not FUNPARM X'01' is set, it is generally best to avoid $FunLoad calls in the middle of an updating transaction, since $FunLoad calls can take a long time to run, even if the specific $FunLoad request is relatively small. This is so because all $FunLoad requests share the same FUNTSKN subtasks, and if these are tied up with relatively long-running requests, all other requests must wait for access to a Fast/Unload task.
To make it easier to diagnose problems where Fast/Unload SOUL Interface is involved, messages are also sent to the Model 204 journal/audit trail at each Fast/Unload request made and at each completed by the Fast/Unload SOUL Interface. The message when the requests are started look like:
MSIR.0890: Asynchronous request 2 made by $FunLoad
And the message when the requests are completed look like:
MSIR.0891: Asynchronous request 2 completed, RC = 0
Examples
In the following example, the Fast/Unload input data is in DDname FUNIN, the report is to go to DDname FUNPRINT, and the data is to be unloaded to DDname FUNOUT.
begin find1: find all records in comics for which name = 'SIMPSON' end find %rc = $funload('FIND1', 'FUNIN', 'FUNPRINT', 'FUNOUT', 'NOBUFF=6') if %rc ne 0 then print 'Error performing Fast/Unload... RC =' and %rc end if end
In the following example, we dynamically build the unload input program, have the report data simply go to the Fast/Unload audit trail, and have the data unloaded to a $list.
begin %list1 = $listNew %list2 = $listNew %rc = $listAdd( %list1, 'FOR EACH RECORD' ) %rc = $listAdd( %list1, ' PUT ''*''' ) %rc = $listAdd( %list1, ' OUTPUT' ) %rc = $listAdd( %list1, ' PAI' ) %rc = $listAdd( %list1, 'END FOR' ) find1: in clowns find all records for which trademark = 'PRATFALL' end find %rc = $funload( 'FIND1', %list1, , %list2) . . . end
In the following example, the input FUEL program is contained in procedure UNLOAD1 in the Model 204 procedure file called FUELPROC. The data is processed with $FunImg calls (not shown).
begin declare list hoho in bigfile . . . %replist = $listNew %records = 'LIST HOHO' %inlist = $listNew %rc = $procOpn('UNLOAD1','FUELPROC') %rc = $procDat(%inlist) %options = 'NEBUFF=4,NBBUFF=2,UPPER,ALLMSG' %rc = $funload( %records, %inlist, , '*', %options ) . . . end
The following is an example of an asynchronous unload request. The input program is in DDname FUNIN, the report data is to go to the Fast/Unload
audit trail, and the data is to be dumped to DDname OUTFILE.
begin findx: in movies find all records for which director = 'HITCHCOCK' end find %options = 'ASYNCH ALLMSG NOBUFF=8' %rc = $funload( 'FINDX', 'FUNIN', , 'OUTFILE', %OPTIONS ) if %rc > 0 then print 'Fast/Unload request accepted,' and 'request number =' with %rc else Print 'Fast/Unload request rejected,' and 'error code =' and %rc end if end