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  • Informix 10 - EXPLAIN

    From [email protected]@21:1/5 to All on Thu Apr 7 08:12:33 2016
    Informix 10
    ------------

    I am a newbie to Informix. So my questions might be too basic.

    I need to obtain the query plan for a SELECT. I am
    using SQL Workbench y Server Studio to run the queries.

    Is there a way in INFORMIX as in PostgreSQL or SQL Server to obtain the query plan in the client PC? If yes how?

    Thank you in advance and sorry for my english!

    Guillermo

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  • From Doug Lawry@21:1/5 to All on Thu Apr 7 21:51:31 2016
    Hi Guillermo.

    In any SQL client, use one of the following statements:

    SET EXPLAIN ON;
    SET EXPLAIN ON AVOID_EXECUTE;

    This creates sqexplain.out on the server in the user's home directory on Linux/UNIX or $INFORMIXDIR on Windows.

    If you have a licence for Server Studio, there is a button to do this with AVOID_EXECUTE, retrieve the file, and display graphically.

    Regards,
    Doug Lawry

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