ABENDS & Debugging: I am working with COBOL DB2 IMS program. To many people who are thrown to work at a mainframe computer on their first job, they feel lost. Mainframe people seem to speak a completely different language and that doesn't make life easy. What's more, the books and. This Document is intend to teach how we can debug a program in Xpediter. If you got any problems while trying this, contact me. At [email protected] Software : XPEDITER VERSION : 7.0 PROGRAM TYPE : BMP (BATCH. Mainframe tutorial on COBOL,JCL,DB2,IMS and interview questions based on Real time experience. IDCAMS program examples Examples of some of the things that you can do with IDCAMS (Access Method Services) //IDCAMS1 EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //VSFILE DD. Errores de jcl / o de usuario ----- s000 Preparing a COBOL- IMS Program. Mainframes 3. 60. Whenever you would like to perform any operation in IMS, say read the data, update the data etc. This is how you code IMS/DB CALLs. You supply additional parameters on the CALL. I shall broadly describe them here - 1)The DLI function It is the first Input- Parameter to the IMS/DB Software. The DLI- Function indicates to IMS, the operation to be performed on the data, and is a 4- Bytes Code. To add new data to the Database 'ISRT'(Insert) DLI- Function is used. To update data, 'REPL'(Replace) DLI- Function, to erase data, the 'DLET' (Delete) DLI- Function and so on, are used. PCB- Mask is a common shared communication- area between IMS/DB Software and the COBOL Program. DB2 SQL - DB2 PROGRAMMING - IMS and DB2 in the same program. IBM Information Management System (IMS) 13 Transaction and Database Servers delivers high performance and low total cost of ownership IBM United States Software Announcement 213-381 October 1, 2013. IMS/DB Software returns- back(communicates) important information to the COBOL Program through the PCB Mask. Was it successful, or did it fail? After every IMS CALL, the IMS/DB Software sets a 2- Digit Status code, to indicate the success or failure of the operation. The Status Code ' '(SPACES) indicates the IMS CALL was successful. A non- Blank status code like 'GE', indicates that the IMS CALL failed due to some reason. IMS/DB Software stores the two- digit status code in the PCB- Mask. As you can see IMS/DB has stored important details in the PCB- Mask. The Status- Code Field is Blank(Spaces), this means the CALL was successful. You send the PCB- Mask to the IMS/DB Software. After the IMS/DB CALL executes, IMS/DB Software stores details such as Status- Code etc. While inserting, the data to added to IMS- Database needs to be first stored in some COBOL- Variable, from where it will be sent to IMS. The Segment. I- O Area is this Input- Output. COBOL- Variable, used for either receiving the Data, when reading from the IMS Database or to send the data, when writing to IMS Database. VENDRSEG, ITEMSSEG and STLOCSEG, and every segment has several instances. While fetching data from the IMS database, suppose you would like to filter- out the data. You would like to retrieve only Vendors Data(VENDRSEG). Or you want to fetchonly ITEMSSEG(Items) Data. SSA's are used to search or filter data. While inserting, SSA's tell what data are you adding - Vendor Data, Items Data or Stock- Location Data. SSA's are in a way similar to the WHEREClause of SQL. In the above picture, see how I have specified the SSA('ITEMSSEG ') to indicate, that it is Items- Data, that I am inserting. IBM MAINFRAME: IBMMAINFRAMES.
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