Re: GTT Locks

  • From: "Jonathan Lewis" <jonathan@xxxxxxxxxxxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 3 Mar 2004 18:03:31 -0000

Notes in-line

Jonathan Lewis
http://www.jlcomp.demon.co.uk

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----- Original Message ----- 
From: "Ravi Kulkarni" <kulkarni.ravi@xxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
Sent: Wednesday, March 03, 2004 5:15 PM
Subject: RE: GTT Locks


> John,
> 

Jonathan

>
> The table GTT needs to be a Global Temporary table.
> 

Absolutely true - I don't know how I managed
to forget the GT bit when I was doing the test

Having corrected the error, I agree with your observations:

    insert into gtt values (1);

Locks:
TY        ID1        ID2      LMODE
-- ---------- ---------- ----------
TX     131091       7538          6
TO      30494          1          3


    commit;
    insert into gtt select rownum from user_objects where rownum = 1;

TY        ID1        ID2      LMODE
-- ---------- ---------- ----------
TX     393219       7548          6
TM      30494          0          3
TO      30494          1          3

    commit;
    begin
        for i in 1..10000 loop
            insert into gtt values (i);
        end loop;
    end;
    /

TY        ID1        ID2      LMODE
-- ---------- ---------- ----------
TX     458780       7532          6
TO      30494          1          3



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