When I am changed setting for Flat Catalog Product to Yes, it gives SQL error in magento 2.

Stores >> Configuration >> Catalog >> Catalog

Is this known bug in magento 2.2.6?

I have done re-indexing after setting changed to Yes.

Please provide the guidance on this.

SQL Error as below:

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'at_featured.value' in 'where clause', query was: 

SELECT DISTINCT  COUNT(DISTINCT e.entity_id) FROM `catalog_product_flat_1` AS `e`
INNER JOIN `catalog_category_product_index_store1` AS `cat_index` ON cat_index.product_id=e.entity_id AND cat_index.store_id='1' AND 
cat_index.visibility IN(2, 4) AND cat_index.category_id='2'
INNER JOIN `catalog_product_index_price` AS `price_index` ON price_index.entity_id = e.entity_id AND price_index.website_id = '1' AND 
price_index.customer_group_id = 0 WHERE (((IFNULL(`at_featured`.`value`, 0) = '1') ))

enter image description here


1 Answer 1


You have to rebuild the index. Afterwards it should work.

The reason is that your attribute "featured" has been added after the flat index has been rebuilt the last time.

The flat index works by creating a column for each attribute that is used in the product listing. The error says that the column is missing, so you have to rebuild the index.

Extensions or custom codes can also mess around with this. If the error persists after the index has been rebuilt, make sure that "Use in product listing" is set to "Yes" for that attribute, rebuild the index again and try to load the page again.

  • Thanks, simonthesorcerer ... It works for me... Ans is excepted and voted up... the last para was the really useful information.
    – 1990rk4
    Commented Nov 20, 2018 at 8:56

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.