strange update behavior

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От Volkmar Herbst GCI
Тема strange update behavior
Дата
Msg-id 006b01cbfa15$41ec1800$c5c44800$@de
обсуждение исходный текст
Список pgsql-sql

 

I did encounter a quite strange behavior during update which I did not understand:

 

The following query updated table parcelle with only one entry for all rows:

update cadastre.parcelle

set code_unique = t2.code_unique  from 

cadastre.parcelle t1, cadastre.propriete t2

where t1.uoid = t2.uoidparcelle;

 

the next update query behaved as expected :

update cadastre.parcelle

set code_unique = t2.code_unique  from 

cadastre.parcelle t1, cadastre.propriete t2

where parcelle.uoid = t2.uoidparcelle;

 

Why do i have to reference table parcelle in the where clause?

 

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