What is start browse in cobol?
Description. STARTBR specifies the record in a file, or in a data table, on a local or a remote system, where you want the browse to start. No records are read until a READNEXT command (or, for VSAM and tables, a READPREV command) is executed. The following browse operations are possible.
How do I read a VSAM file dynamically?
Example: using dynamic access with VSAM files
- Retrieve the first record randomly (with a random-retrieval READ ) based on the key of 1500.
- Read sequentially (using READ NEXT ) until the salary field exceeds 2000.
- Retrieve the next record randomly, based on a key of 2500.
- Read sequentially until the end of the file.
What does invreq error in read command indicate?
The return command with the Commarea option is specified in a program which is not at the highest level. is passed.
How do you read a VSAM with a partial key?
Read VSAM with partial key
- START (F), then READ-NEXT (G) Return code from START is 23.
- START-GREATER-THAN (N), then READ-NEXT (G) Return code from S-G-T is 00, return code from READ-NEXT is also 00, but the record retrieved was the first record in the VSAM, not the key requested.
Can we rewrite sequential file in Cobol?
The file must be opened in I-O mode for REWRITE statement. The REWRITE statement is not supported for line-sequential files.
How do you read old records in Cobol?
- file-name-1 – Specifies the file-name defined in data division FD entry.
- PREVIOUS RECORD – Reads the previous record in the logical sequence of records.
- INTO identifier-1 – INTO Clause used to store the retrieved record into the identifier-1.
- AT END phrase –
- END-READ phrase –
How do I read VSAM KSDS file in COBOL?
COBOL VSAM Files READ with START Logic
- Establish a Key. START statement positions the cursor.
- READ Statement. The purpose of READ statement is to fetch a record randomly after establishing a key.
- READ NEXT Statement. READ Next fetches records sequentially till end of the input VSAM file.
- Write a Record.
What is access mode in COBOL?
The access mode defines how COBOL reads and writes files, but not how files are organized. You should decide on the file organization and access modes when you design your program.
What is Lengerr in CICS?
When this transaction runs on CICS Transaction Server for z/OS (CICS TS) V5. 1, the transaction fails and LENGERR is returned indicating that there is an problem with the length of the COMMAREA. The same programs ran successfully in CICS TS V4. 2.
What is read next in Cobol?
READ NEXT statement used to read the next records from the current reading position of the file. The file must be opened in INPUT or I-O mode to perform the READ NEXT statement. For sequential access, the READ NEXT statement makes the next logical record from a file available to the object program.
What does the start statement in COBOL mean?
The START statement provides a way to position a read in a file for subsequent sequential retrieval (by key). The key relational can include (but is not limited to): KEY IS GREATER THAN OR EQUAL TO
What does the startbr command in CICS do?
STARTBR is known as start browse. The STARTBR command gets the process started. It tells the CICS from where to start reading the file. The FILE and RIDFLD parameters are the same as in a READ command. The options allowed are GTEQ and EQUAL. UPDATE is not allowed and file browsing is strictly a read-only operation.
When do you use Extend mode in COBOL?
If a sequential file is used and the file is holding some records, then the existing records will be deleted first and then new records will be inserted in the file. It will not happen so in case of an indexed file or a relative file. Extend mode is used to append records in a sequential file.
Can you handle the invalid key condition in COBOL?
You can handle the INVALID KEY condition, or change the key for the START, but the code per se is not wrong — COBOL and VSAM are working as designed in this case. Ok, point taken.. . One needs to distinguish between an empty VSAM file, which has no records in it, and an initialized VSAM file, which has a record with all spaces in it..