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我正在使用sql 2008全文搜索,我遇到严重的性能问题,具体取决于我如何使用Contains或ContainsTable.

下面是示例:(表一有大约5000条记录,table1上有一个覆盖索引,其中包含where子句中的所有字段.我试图简化语句,如果有语法问题,请原谅我.)

场景1:

select * from table1 as t1
where t1.field1=90
and   t1.field2='something'
and   Exists(select top 1 * from containstable(table1,*, 'something') as t2 
where t2.[key]=t1.id)

结果:10秒(非常慢)

场景2:

select * from table1 as t1
join containstable(table1,*, 'something') as t2 on t2.[key] = t1.id
where t1.field1=90
and   t1.field2='something'

结果:10秒(非常慢)

场景3:

Declare @tbl Table(id uniqueidentifier primary key)
insert into @tbl select {key] from containstable(table1,*, 'something')

select * from table1 as t1
where t1.field1=90
and   t1.field2='something'
and  Exists(select id from @tbl as tbl …