Boundary query & where condition

sqoop import -m 6 --connect “jdbc:mysql://quickstart.cloudera:3306/retail_db” --username “retail_dba” --password “cloudera” --table “order_items” --boundary-query “select 1,50 from order_items where order_item_subtotal > 1000” --target-dir “/user/cloudera/sqoop_import/orders_bound/whereCondition/” --outdir java_files

though this query select 1,50 from order_items where order_item_subtotal > 1000 returns 15 records in MYSQL.

But when I applied to sqoop export with boundary query I am getting first 50 records.

Please help me understand.