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我有一个HQL查询,像这样:休眠 - HQL帮助优化查询
Select
... (around 40 items)...
from
ATable a
left outer join a.subA SubA
left outer join a.subB SubB
left outer join a.Names Names
left outer join Names.Addresses Addresses
left outer join Names.Phones Phones
left outer join a.Roles Roles
where
a.aType.someType in ('...')
and (Names.id.FKey in('...') or Names.id.FKey is null)
and upper(a.pin) like upper('some%')
and upper(Names.lastName) like upper('Some%')
order by a.pin asc
出于某种原因出这个时间,但由Hibernate生成的查询(从日志中获得)需要5秒,而使用蟾蜍执行。我是休眠的新手。我很感谢任何帮助优化此感谢。
http://hungred.com/useful-information/ways-optimize-sql-queries/ – shevchyk