Index on timestamp fields

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От David Gardner
Тема Index on timestamp fields
Дата
Msg-id C975BFE03CC5DE4999143A5BEA9FB515021DC0C51F@yucex.lax.yucwin
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Ответы Re: Index on timestamp fields
Re: Index on timestamp fields
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I have a timestamp without timezone field in one of my tables that is used in the where clause of one of my queries:
WHERE date_trunc('day',"backupReports"."start")= current_date

I also built an index on that column, I'm assuming that by using the date_trunc() function in my where clause forces
pgsqlto perform a sequential scan. 
Is there a better way to do this? The query needs to return the full timestamp, although I am only selecting by date so
changingthe data type for the column won't work. 

Also would saving the value of current_date to a local variable improve performance?

---
David Gardner, IT
The Yucaipa Companies
(310) 228-2855


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