Обсуждение: Best way to index large text/varchar fields

In 8.1, what is the best way to index large text/varchar fields for wild card searches?

I am getting good number of queries being submitted for reporting purposes that are doing the following - where <text/varchar field> like '%some phrase%' and ....
Is there a good way to index these fields so that the db engine will use and index?

Thanks,

Chris

Chris Hoover wrote:
> In 8.1, what is the best way to index large text/varchar fields for wild
> card searches?
>
> I am getting good number of queries being submitted for reporting
> purposes that are doing the following - where <text/varchar field> like
> '%some phrase%' and ....
> Is there a good way to index these fields so that the db engine will use
> and index?

If you are indeed using phrases, and thus paragraphs of text, you should
look into Tsearch2.

Joshua D. Drake

>
> Thanks,
>
> Chris


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