SQL_CALC_FOUND_ROWS / FOUND_ROWS() does not work in PHP

Question

I use SQL_CALC_FOUND_ROWS in Mysql SELECT statement, to get the number of lines my SELECT would return without a LIMIT clause.

$sql = new mysqli         


        

Answer 1

The quickest solution is to subquery your actual query like this:

SELECT SQL_CALC_FOUND_ROWS * FROM (SELECT whatever FROM whatever WHERE whatever LIMIT whatever) ax; 
select FOUND_ROWS();

Now you will get the correct results. I think the main reason being that SQL_CALC_FOUND_ROWS mainly tracks rows found (i.e. without LIMITS) not rows returned.