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Date: Fri, 25 Aug 2006 13:11:25 -0700 (PDT)
From: "Rick Hillegas (JIRA)" <derby-dev@db.apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-1621) Trigger action statement is not
 recompile when there is a change that would affect it.
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    [ http://issues.apache.org/jira/browse/DERBY-1621?page=comments#action_12430609 ] 
            
Rick Hillegas commented on DERBY-1621:
--------------------------------------

Ported DERBY-1621 (434046) to 10.2 branch at subversion revision 436921.

> Trigger action statement is not recompile when there is a change that would affect it.
> --------------------------------------------------------------------------------------
>
>                 Key: DERBY-1621
>                 URL: http://issues.apache.org/jira/browse/DERBY-1621
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.1.0
>            Reporter: Daniel John Debrunner
>         Assigned To: Yip Ng
>            Priority: Critical
>             Fix For: 10.2.1.0
>
>         Attachments: derby1621trunkdiff01.txt, derby1621trunkdiff02.txt, derby1621trunkdiff03.txt, derby1621trunkdiff04.txt, derby1621trunkstat01.txt, derby1621trunkstat02.txt, derby1621trunkstat03.txt, derby1621trunkstat04.txt
>
>
> A trigger action statement, such as an INSERT statement is not recompiled when there is some DDL change on the underlying table, such as a CREATE INDEX.
> In the example below a unique index is added to the table (t2) inserted into by the trigger's action statement. When the tirgger fires it does not raise any error (should raise a unique constraint violated error) and does not insert the value into the index. A select from t2 does not show the additional rows in t2 as it is performing an index scan, once the index is dropped the rows appear to the select.
> ij version 10.2
> ij> connect 'jdbc:derby:cs;create=true';
> ij> create table t (i int);
> 0 rows inserted/updated/deleted
> ij> create table t2 (i int);
> 0 rows inserted/updated/deleted
> ij> create trigger tt after insert on t for each statement mode db2sql
> insert into t2 values 1;
> 0 rows inserted/updated/deleted
> ij> insert into t values 1;
> 1 row inserted/updated/deleted
> ij> select * from t2;
> I
> -----------
> 1
> 1 row selected
> ij> create unique index tu on t2(i);
> 0 rows inserted/updated/deleted
> ij> insert into t values 1;
> 1 row inserted/updated/deleted
> ij> select * from t2;
> I
> -----------
> 1
> 1 row selected
> ij> insert into t values 1;
> 1 row inserted/updated/deleted
> ij> select * from t2;
> I
> -----------
> 1
> 1 row selected
> ij> drop index tu;
> 0 rows inserted/updated/deleted
> ij> select * from t2;
> I
> -----------
> 1
> 1
> 1
> 3 rows selected

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