What are the mandatory keywords for subfile?
The SFLDSPCTL keyword is required if your program sends an input operation to the subfile-control record format. The USRDFN keyword is not valid for the subfile-control record format. The keywords CHCAVAIL, CHCSLT, and CHCUNAVAIL can be used only if either SFLSNGCHC or SFLMLTCHC is also used.
Which is the display file keyword?
You use this file-level keyword to specify that the records in the display file are written right to left on the display. You use this file-level keyword to specify the display size to which your program can open the display file. You use this field-level keyword to activate the Dup key on the display station keyboard.
How do I run a display file in as400?
STRSDA Test display file-Go4As400.com. Start SDA (Screen Design Aid) and select option-3. Press ENTER, Here is the screen window. When you press F12 indicator *IN12 will be *ON.
What is the purpose of the Sflnxtchg keyword?
You use this record-level keyword on the subfile record format to force the workstation user to correct program-detected typing errors in subfile records that have been read by the program.
What is Sflpag and Sflsiz?
The specified SFLPAG value is increased to equal the maximum number of records that fit on the display if the number of subfile records to be displayed do not occupy a full display. The SFLSIZ value is increased by the same value.
What is Exfmt in Rpgle?
Factor 2 must contain the name of the record format to be written and then read. A resulting indicator can be specified in positions 56 and 57 to be set on if the EXFMT operation is not completed successfully.
What is overlay keyword in as400?
The OVERLAY keyword overlays the storage of one subfield with that of another subfield, or in a fixed-form definition, with that of the data structure itself. The Name-entry subfield overlays the storage specified by the name parameter at the position specified by the start_pos parameter.
What is DDS in as400?
Data description specifications (DDS) describe data attributes in file descriptions that are external to the application program that processes the data. The file types that use DDS are physical and logical files, display files, printer files, and intersystem communications function (ICF) files.
What is a subfile in as400?
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. When the entire subfile has been written, the program sends the entire subfile to the display device in one write operation.
What is message subfile?
Message subfile
· Message subfile as the name signifies is a subfile of messages. It is a special subfile specially designed to hold messages. · Message subfile loads itself automatically at runtime loads with the messages from program message queue to display it on the screen.
What is Sflpag?
You use this record-level keyword on the subfile-control record format to specify the number of records in the subfile to be displayed at the same time. For an exception to this rule, see Field selection.
How do you take user input in Rpgle?
EXFMT first of all write the input buffer to the display device (to the screen field variable) and then reads the fields value to provide it to the program. Now the screen will ask for user input, we simply press ‘ENTER’ key.
What is Readc as400?
READC will cause our program to read subfile records that have been changed, keyed into, field exited. Even we not making any change in the record but we are keying in some value (by mistake) or pressing the field exit key, the record is supposed to be changed. Hence, READC will detect these cases also.
What is Sflcsrrrn in as400?
SFLCSRRRN (Subfile Cursor Relative Record Number) keyword for display files. You use this record-level keyword on the subfile-control record format to return the relative record number of the record on which the cursor is located within a subfile.
What is PF file in AS400?
A physical file is a database file that contains data records. The data records are grouped into physical file members and each… Written by Naveen Kumar Aug 12 · 6 min read. A physical file is a database file that contains data records.
What is record format in AS400?
The specific combination of data types and sizes and the number and order of columns is hashed into a value that is known as the “record format identifier”. A significant purpose is the inclusion by compilers of the “record format identifier” in compiled program objects for use when the related file is opened.
How do I read a subfile record?
You can read a subfile sequentially or randomly. To read a subfile sequentially, you must specify the NEXT MODIFIED phrase in the Format 5 READ statement. When the NEXT MODIFIED phrase is specified, the record made available is the first record in the subfile that has been modified.
What type of loading method is used in subfile?
Load-All Subfile
If we are writing more records in the subfile buffer than the SFLSIZ declared and SFLSIZ<9999, then the SFLSIZ is extended to accommodate all records till the size of 9999. 9999 is the buffer limit. In this case PAGEUP AND PAGEDOWN is taken care by system. SFLPAG should be less than SFLSIZ.
What is message subfile in as400?
Message subfile as the name signifies is a subfile of messages. It is a special subfile specially designed to hold messages. Message subfile loads itself automatically at runtime loads with the messages from program message queue to display it on the screen.
How do I display a subfile?
To use a subfile for a display device file in an RPG program, you must specify the SFILE keyword on a file description specification for the WORKSTN file. The format of the SFILE keyword is SFILE(record format name:RECNO field name). The WORKSTN file must be an externally-described file (E in position 22).
How do you read a subfile?
To read a subfile randomly, you must specify, in the RELATIVE KEY data item, the relative record number of the subfile record you want to read and you must not specify the NEXT MODIFIED phrase in the Format 5 READ statement.
What is Infds in as400?
A file information data structure (INFDS) can be defined for each file to make file exception/error and file feedback information available to the program or procedure. The file information data structure, which must be unique for each file, must be defined in the same scope as the file.
What is PF and LF in AS400?
| Physical file | Logical file |
|---|---|
| 4. If there is a logical file for a PF, the PF can’t be deleted until and unless we delete the LF. | 4. If there is a logical file for a PF, the LF can be deleted without deleting the PF. |
| 5.CRTPF command is used to create such object | CRTLF command is used to create such type object |
How do I use unique keywords in AS400?
You can use this file-level keyword to specify that records with duplicate key values are not allowed within a member of this physical or logical file. You can specify whether null key values are to be considered as duplicates using the parameter.
How many files can be declared CL?
one file
Only one file can be declared in a CL program or ILE CL procedure with *NONE as the open file identifier.