What is chain in Rpgle?
CHAIN in rpgle-go4as400.com. Ü Chain. The CHAIN command does a SETLL and a READE in order to find a match. CHAIN is best used to locate a unique record (like a customer record) from a full procedural file. In case of CHAIN, the file operation is used to randomly retrieve a record from a file.
What is chain n?
If you are reading from an update disk file, you can specify an N operation extender to indicate that no lock should be placed on the record when it is read (e.g. CHAIN (N)).
What is Exfmt?
The EXFMT operation is a combination of a WRITE followed by a READ to the same record format. EXFMT is valid only for a WORKSTN file defined as a full procedural combined file that is externally described. The format-name operand must be the name of the record format to be written and then read.
How do you check your Rpgle record lock?
Enter command “DSPRCDLCK FILE(LIBRARY/FILENAME) RCDNBR(99999999)” to check if lock still exists.
- Where LIBRARY is the name of the library noted down in step 5.
- FILENAME is the name of the file noted down in step 5.
- 99999999 is the number of the record in use noted down in step 7.
How do you stop Rpgle recording lock?
First is the use of the opcode extender N, which tells RPG not to lock the record even though the file is specified for update. The second is the use of the first custRec array element as the result field. This feature, in case you have not seen it before, has been available for externally described files since V5R2.
What is Exfmt in Rpgle?
What is the difference between ITER and leave in as400?
The ITER operation takes the control to ENDDO, ENDFOR while LEAVE transfers control to the statement following the ENDDO or ENDFOR operation.
What is record locking in Salesforce?
When an sObject record is locked, no other client or user is allowed to make updates either through code or the Salesforce user interface.
How we can know file is locked in RPG?
The RPG program places an exclusive-allow-read lock state on device files. Another user can open the file with a shared-for-read lock state. The lock state placed on the file by the RPG program can be changed if you use the Allocate Object command….File Locking.
| File Type | Lock State |
|---|---|
| Add | Shared for update |
| Output | Shared for update |
What is subfile in Rpgle?
A subfile is a group of records that is read from or written to a display-device file. For example, a program reads records from a database file and creates a subfile of output records.
Which type of loading method in subfile the Pageup is taken care by system?
Load-All Subfile 9999 is the buffer limit. In this case PAGEUP AND PAGEDOWN is taken care by system.
Which built in function is used to check whether the end of file is reached or not?
%EOF Built-In Functions in rpgle-go4as400.com. This built-in function is used to detect end-of file, beginning of file, or subfile full conditions while performing a file operation similar to resulting indicator. So, instead of checking any resulting indicator we simply use %EOF to check if the end of file is reached.
What are the difference S between Exfmt and write in Rpgle?
What is the difference between WRITE and EXFMT of a display file? WRITE displays a record format on workstation, EXFMT displays and accepts from the workstation.
What does ITER do in Rpgle?
The ITER operation transfers control from within a do group to the ENDDO statement of the do group. It can be used in DO, DOUxx, and DOWxx loops to transfer control immediately to a loop ENDDO statement. It causes the next iteration of the loop to be executed immediately.
Do loops Rpgle?
The Do-EndDo loop is used when we have to iterate over a block of statements for specific number (say 10, 20 100) of times. The do loop takes arguments as below: The Starting Counter, The maximum value and the index value. We can specify any of the above values as variables.
How many ways we can lock a record in Salesforce?
There are 7 ways to lock a record using UI and coding.