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Status Submitted
Workspace IBM i
Categories IBM i Access Family
Created by Guest
Created on Jan 6, 2026

IBM i Access ODBC driver query execution timeout

My organization is using PHP/Laravel and the IBM i access odbc driver to connect to DB2.

We have had a few scenarios where the php application sends a sql query and then waits indefinitely for the result, until PHP's max execution time kicks and kills the script. (See additional details).

I do understand that a predictive query governor exists. It makes a lot of sense, but I do not believe it would've helped in the previously described scenarios because under normal circumstances all of my queries are quite fast.

So in addition to a predictive query timeout, an actual run time timeout still has value. I do not think these concepts are mutually exclusive they could be used together. The predictive timeout can reject expensive queries before they even start and the actual runtime timeout can kill queries that are running longer than expected (there's probably an issue).

I am also aware of SQL cancel. However that is not trivial to implement. For every query my application issues I will need two threads - one to issue the query and another to time the former/issue sql cancel if necessary. That is a lot of development overhead - a simple configuration value would be much easier.

Idea priority Low
  • Guest
    Jan 7, 2026

    I think this is already implemented with the use of the Query Supervisor: https://www.ibm.com/docs/en/i/7.6.0?topic=tools-query-supervisor