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From "Yip Ng (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1554) IDENTITY_VAL_LOCAL() returned value is modified incorrectly by a multi-row INSERT statement.
Date Thu, 03 Aug 2006 21:18:14 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1554?page=comments#action_12425615 ] 
            
Yip Ng commented on DERBY-1554:
-------------------------------

Hi Narayanan

   I looked at the attached patch.  It is returning the wrong result in the following case:
It should be null.

ij> create table t1 (i int generated by default as identity, j int);
0 rows inserted/updated/deleted
ij> create table t2 (i int);
0 rows inserted/updated/deleted
ij> insert into t1 (i) select i from t2;
0 rows inserted/updated/deleted
ij> values identity_val_local();
1
-------------------------------
0

1 row selected



> IDENTITY_VAL_LOCAL() returned value is modified incorrectly by a multi-row INSERT statement.
> --------------------------------------------------------------------------------------------
>
>                 Key: DERBY-1554
>                 URL: http://issues.apache.org/jira/browse/DERBY-1554
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.0.0
>            Reporter: Daniel John Debrunner
>         Assigned To: Yip Ng
>             Fix For: 10.2.0.0
>
>         Attachments: DERBY-1554.diff, DERBY-1554.stat
>
>
> Changes made in DERBY-353 break the documented behaviour of IDENTITY_VAL_LOCAL(). Now
the returned value is modified when a multi-row insert is performed.
> IDENTITY_VAL_LOCAL() should not be updated when this occurs.
> For this script the last value returned should be 2 (as in 10.1) but in 10.2 is 4
> create table ta (a int, b int generated always as identity);
> insert into ta(a) values 100;
> values IDENTITY_VAL_LOCAL();
> insert into ta(a) values 200;
> values IDENTITY_VAL_LOCAL();
> insert into ta(a) values 300,400;
> values IDENTITY_VAL_LOCAL();

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