Re: slow cursor

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От Luckys
Тема Re: slow cursor
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Msg-id b80d582c0604172155n232fba1eybd3cc3f89ec0db5f@mail.gmail.com
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Ответ на slow cursor  ("Sriram Dandapani" <sdandapani@counterpane.com>)
Список pgsql-performance
This is one thing that I always try to avoid, a single INSERT INTO...SELECT ...FROM or single UPDATE is always faster compared to looping the same within a cursor, unless its inevitable.
 
regards,
Luckys.

 
On 4/17/06, Sriram Dandapani <sdandapani@counterpane.com> wrote:

Hi

 

I have a cursor that fetches 150K rows and updates or inserts a table with 150K rows.

 

It takes several minutes for the process to complete (about 15 minutes). The select by itself (without cursor) gets all rows in 15 seconds.

 

Is there a way to optimize the cursor to fetch all records and speed up the process. I still need to do the record by record processing

 
 

 

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