I have a MyISAM table called products with primary key on the field product_id.The table currently has 47 rows. I'm trying to get an accurate statistics on number of rows that need to be scanned to execute a query.So I did the following:
1. FLUSH STATUS
2. SELECT product_id FROM products
3. SHOW STATUS LIKE "Handler%"
I thought I should be getting Handler_read_next=47, but instead I'm getting Handler_read_rnd_next=10, Handler_write=9,and all rest are zero. Why is that?