Re: Why are triggers semi-deferred?

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От Philip Warner
Тема Re: Why are triggers semi-deferred?
Дата
Msg-id 5.1.0.14.0.20030506012322.0552fe80@mail.rhyme.com.au
обсуждение исходный текст
Ответ на Re: Why are triggers semi-deferred?  (Stephan Szabo <sszabo@megazone23.bigpanda.com>)
Ответы Re: Why are triggers semi-deferred?  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-hackers
At 08:20 AM 5/05/2003 -0700, Stephan Szabo wrote:
>Actually, I think from sql99's description, for after row triggers it
>should happen after the row is modified not after the statement as a
>whole (so given two 2 row updates in a function you'd get
>  update1,row1 afterrow1-1 update1,row2 afterrow1-2,afterstatement1
>  update2,row1 afterrow2-1 update2,row2 afterrow2-2,afterstatement2
>)

Totally agree (I think) -- I am not sure how to interpret your example. To 
(I hope) clarify: if a function has two update statements (A & B), each of 
which update two rows (1 & 2), I would expect the triggers to fire as:

Procedure Starts    Statement A executes:        Before Row 1        After Row 1        Before Row 2        After Row 2
      Statement Trigger for A    Statement B executes:        Before Row 1        After Row 1        Before Row 2
After Row 2        Statement Trigger for B
 
Procedure Ends

At the current time in 7.3, we have:

Procedure Starts    Statement A executes:        Before Row 1        Before Row 2    Statement B executes:
BeforeRow 1        Before Row 2
 
Procedure End
After Row 1
After Row 2
After Row 1
After Row 2

...which seems weird to me. Is this something that needs fixing in 7.3.3?



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