sql - Optimize Hibernate HQL SELECT with IN clause -


please how can optimize query?

from orderentity id in (select distinct orderid productentity    code = :mycode or extcode = :mycode)

this query slow tables has around million rows

order 1 ... * product

thank help

edit

in pure sql use query fast, don't know how form in hql:

select * order o, (select distinct order_id product code = 'abc'     or ext_code = 'abc') p o.id = p.order_id

i guess productentity can mapped association orderentity (foreign key order_id) .

if true, try map , test query (inner join may faster) : 

select o  productentity p  inner join p.orderentity o  p.code = :mycode or p.extcode = :mycode

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