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Status Submitted
Workspace IBM i
Categories Db2 for i
Created by Guest
Created on Jan 29, 2026

RELATED IDEAS

Enable "MAINTAINED BY SYSTEM" in creating an MQT

Complex  SQL views are slow so when response time is paramont I firstly create an MQT by executing a

 CREATE OR REPLACE TABLE (table name)

 (some SQL) 

DATA INITIALLY IMMEDIATE

REFRESH DEFERRED

MAINTAINED BY USER

 

and then query this table.

 

However, I alway need to explicitly create this MQT prior to using it

If the option MAINTAINED BY SYSTEM was availabe then we will have 

an SQL view with a LF-like respone time. 

Idea priority Medium
  • Guest
    Jan 29, 2026

    Agree with the Guest comment.

    However, the system should be maintaining MQT automatically. Each time it is needed, the process should not have to stop to Refresh table. That should be a no-brainer. Do we rebuild keys in Indexes or LFs everytime we access them? No.

    This is an excellent idea in my opinion.

    Reply
  • Guest
    Jan 29, 2026

    An MQT is designed to be a snapshot of the data on a certain moment. You don't have to recreate it, just REFRESH TABLE to refresh the data in the MQT

    Reply

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