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From "Rick Hillegas (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-353) It is desirable to have IDENTITY_VAL_LOCAL() function return last recent user specified value or system generated value for BY DEFAULT identity columns.
Date Tue, 30 Aug 2005 00:30:05 GMT
    [ http://issues.apache.org/jira/browse/DERBY-353?page=comments#action_12320516 ] 

Rick Hillegas commented on DERBY-353:
-------------------------------------

The patch looks good but derbyall fails with diffs in derbylang/autoincrement. Was a canon
left out of the patch?

> It is desirable to have IDENTITY_VAL_LOCAL() function return last recent user specified
value or system generated value for BY DEFAULT identity columns.
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-353
>          URL: http://issues.apache.org/jira/browse/DERBY-353
>      Project: Derby
>         Type: Bug
>   Components: SQL
>     Versions: 10.1.1.0
>  Environment: Generic
>     Reporter: Satheesh Bandaram
>  Attachments: patch353.diff
>
> Derby was recently enhanced to support BY DEFAULT identity column. While the behavior
of this feature is not documented yet, I think, it is desirable for IDENTITY_VAL_LOCAL() function,
that is used to retrieve last single statement insert value for identity column, to return
user specified value for the default column.
> For GENERATED ALWAYS identity columns, this issue doesn't apply, since users can't provide
a value. But for GENERATED BY DEFAULT identity columns, users can optionally specify a value.
IDENTITY_VAL_LOCAL() function should return this value. Derby currently doesn't support this
behavior.
> ij> create table tauto ( i int generated by default as identity, j int, k int);
> 0 rows inserted/updated/deleted
> ij> insert into tauto (j,k) values (1,1);
> 1 row inserted/updated/deleted
> ij> values identity_val_local();
> 1
> -------------------------------
> 1
> 1 row selected
> ij> insert into tauto (j,k) values (1,1);
> 1 row inserted/updated/deleted
> ij> values identity_val_local();
> 1
> -------------------------------
> 2
> 1 row selected
> ij> insert into tauto values (5,1,1);
> 1 row inserted/updated/deleted
> ij> values identity_val_local();
> 1
> -------------------------------
> 2                                                                     <<<<<<<<<<<<<<=============
This needs be '5'
> 1 row selected
> ij> select * from tauto;
> I          |J          |K
> -----------------------------------
> 1          |1          |1
> 2          |1          |1
> 5          |1          |1
> 3 rows selected

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