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Status Not under consideration
Workspace Informix
Components Informix Server
Created by Guest
Created on Oct 14, 2014

Informix Query Engine generates bad query/explain plan

There are situations where two or more columns from the same table are related to each other. For example, product_type and product_code from the products table are related, since only certain product_code values can be associated with a given product_type. There are frequently queries that have filters on both columns at the same time, e.g., product_type = 'HG' and product_code = 135. When correlation exists such combination of filters on related columns often results in inaccurate estimates from the Informix optimizer, leading to bad query plan.
  • Admin
    Karen Qualley
    Reply
    |
    May 5, 2021

    Thank you for the feedback! This is not in our current roadmap at this time but please reopen or reach out for further discussion if needed.