Author: NoSleep319
Subject: -913/-911 Deadlock during UPDATE statement
Posted: Fri Nov 18, 2016 12:37 am (GMT 5.5)
Hello mainframe guru's! I'm looking for some deadlock insight.
I have a COBOL module that does a SELECT on a table looking for records for that system and that have 'PENDING' in the status column, generates some output if found, updates the status column to 'PROCESSED', then moves onto the next record. This job runs on 27 different partitions/systems and is scheduled every 15 minutes. The table resides on one system and is connected to remotely by the other systems. I'm somewhat new to understanding deadlocks, but I do understand that one program/system is trying to perform an UPDATE while, at the exact same time, another program/system is trying to perform a SELECT. I think I may need to reconstruct my SELECT statement, because there is a column specific to the system, and the SELECT statement queries it's own system records only.
This is my SELECT cursor:
This is my Update statement:
Is there a way to query it while it's being updated and not caring that it's updated?
Subject: -913/-911 Deadlock during UPDATE statement
Posted: Fri Nov 18, 2016 12:37 am (GMT 5.5)
Hello mainframe guru's! I'm looking for some deadlock insight.
I have a COBOL module that does a SELECT on a table looking for records for that system and that have 'PENDING' in the status column, generates some output if found, updates the status column to 'PROCESSED', then moves onto the next record. This job runs on 27 different partitions/systems and is scheduled every 15 minutes. The table resides on one system and is connected to remotely by the other systems. I'm somewhat new to understanding deadlocks, but I do understand that one program/system is trying to perform an UPDATE while, at the exact same time, another program/system is trying to perform a SELECT. I think I may need to reconstruct my SELECT statement, because there is a column specific to the system, and the SELECT statement queries it's own system records only.
This is my SELECT cursor:
| Code: |
SELECT UPPER(RACF_ID) , UPPER(ACTN_CD) , UPPER(STTS_CD) , UPPER(ROLE_NM) , RACF_PRCS_INFO_ID FROM RACF_PRCS_INFO WHERE RACF_ENV_CD = :WS-RACF-ENV-CD AND STTS_CD = :C-STTS-CD-PEND ORDER BY RACF_ID ASC, RQST_TSTMP DESC |
This is my Update statement:
| Code: |
UPDATE RACF_PRCS_INFO SET STTS_CD = 'PROCESSED', CMPLT_TSTMP = CURRENT TIMESTAMP WHERE RACF_PRCS_INFO_ID = :WS-RACF-PRCS-INFO-ID |
Is there a way to query it while it's being updated and not caring that it's updated?