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Status Submitted
Workspace IBM i
Categories Db2 for i
Created by Guest
Created on Jul 25, 2023

RELATED IDEAS

improve MERGE by adding the option "WHEN NOT MATCHED BY SOURCE THEN DELETE"

Today, it is impossible to use the DELETE clause behind WHEN NOT MATCHED.
Some DBMS other than DB2 allow this.
Would it be possible to add this feature, like in this example ?

MERGE target_table USING source_table
ON merge_condition
WHEN MATCHED
   THEN update_statement
WHEN NOT MATCHED
   THEN insert_statement
WHEN NOT MATCHED BY SOURCE
   THEN DELETE;

There are a lot of cases where this feature would be very useful.

 

Idea priority High
  • Admin
    Carmelita Ruvalcaba Cevallos
    Reply
    |     Aug 22, 2023

    The CAAC has reviewed this IBM Idea and recommends that IBM view this as a medium priority Idea that should be addressed.

    This will be extremly usable. The visibily is why we are keeping it medium.

    Background: The COMMON Americas Advisory Council (CAAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CAAC has a key role in working with IBM i development to help assess the value and impact of individual IBM Ideas on the broader IBM i community and has therefore reviewed your Idea.


    For more information about CAAC, see www.common.org/caac

    Carmelita Ruvalcaba- CAAC Program Manager

  • Guest
    Reply
    |     Jul 27, 2023

    Duplicate of https://ibm-power-systems.ideas.ibm.com/ideas/IBMI-I-3484

  • Guest
    Reply
    |     Jul 26, 2023

    I just had an occasion where I could have used this. I had to use a separate SQL statement containing an exception join to accomplish the task. It would have been easier to understand the logic if it all could have been done in the MERGE.

6 MERGED

Extend MERGE Statement to support NOT MATCHED BY SOURCE

Merged
Please add an option to perform an action if there was no match in the source table, this would allow us to for example delete old rows in the target table. At the moment we need to do an additional full outer join on the target table to solve thi...
about 2 years ago in IBM i / Db2 for i 3 Future consideration

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