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infinite loop in an update statement - Mailing list pgsql-general

From Fabrice Chapuis
Subject infinite loop in an update statement
Date
Msg-id CAA5-nLDmkuRbjHJvf2-Sz0FxtJtoFdrg4mUTy6N84UpZtGZJwQ@mail.gmail.com
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Re: infinite loop in an update statement
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Hi,

table a and b are empty, this query does not return. It seems we enter in infinite loop.
why this update does not return instantly?

UPDATE table_a a                                                
 SET col1 = (SELECT MIN(b.col1)                               
                    FROM table_b b                                      
                    WHERE b.col2 = a.col2)

Regards,

Fabrice


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