Re: Suggestion to improve query performance of data validation in proc.

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От Michael Lewis
Тема Re: Suggestion to improve query performance of data validation in proc.
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Msg-id CAHOFxGpchYLK0H0kNFQT1pfqk3oyMhEWNCaPsne5nzXLi4QJCQ@mail.gmail.com
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Ответ на Re: Suggestion to improve query performance of data validation in proc.  ("David G. Johnston" <david.g.johnston@gmail.com>)
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On Fri, May 22, 2020 at 2:09 AM David G. Johnston <david.g.johnston@gmail.com> wrote:
On Friday, May 22, 2020, postgann2020 s <postgann2020@gmail.com> wrote:
 

We are looking for a better query than "SELECT 1  FROM schema.table_name WHERE column1=structure_id1" this query for data validation.

 If many rows match potentially, then wrapping the query with select exists(old_query) would allow the execution to bail asap.

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