Question

I find that MySQL returns a

Incorrect usage/placement of 'SQL_CALC_FOUND_ROWS'

error if I put SQL_CALC_FOUND_ROWS in a subquery

SELECT
  *
FROM
  (
     SELECT SQL_CALC_FOUND_ROWS * FROM test_table
  ) as T1

Is there a workaround for this? or am I just implementing it incorrectly?

EDIT: There is a reason why I need to make T1 a subquery in case anyone is wondering.

Answer 1

It seems like you’re using it incorrectly. The SQL_CALC_ROWS_FOUND seems to only apply to outer queries. I’m not sure if this would fit your use case, or if you have additional WHEREs in your outer query, but you may be able to do something like this:

SELECT
SQL_CALC_FOUND_ROWS *
FROM
(
SELECT * FROM test_table
) as T1 ;
SELECT FOUND_ROWS();

The FOUND_ROWS() function will give you the total number of rows found before any LIMITs are applied. For more on FOUND_ROWS() check here.