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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-5120) Row from SYSDEPENDS gets deleted when a table has update triggers defined on it and an upate is made to the table
Date Wed, 13 Jul 2011 02:26:59 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mamta A. Satoor updated DERBY-5120:
-----------------------------------

    Attachment: DERBY5120_patch3_stat.txt
                DERBY5120_patch3_diff.txt

Adding a new patch which now has a test for the changes.Next,will work on an upgrade test

> Row from SYSDEPENDS gets deleted when a table has update triggers defined on it and an
upate is made to the table
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-5120
>                 URL: https://issues.apache.org/jira/browse/DERBY-5120
>             Project: Derby
>          Issue Type: Task
>          Components: SQL
>    Affects Versions: 10.2.2.0, 10.8.1.2
>            Reporter: Mamta A. Satoor
>            Assignee: Mamta A. Satoor
>         Attachments: DERBY5120_patch1_diff.txt, DERBY5120_patch1_stat.txt, DERBY5120_patch2_diff.txt,
DERBY5120_patch2_stat.txt, DERBY5120_patch3_diff.txt, DERBY5120_patch3_stat.txt
>
>
> I have an ij script below which shows that the number of rows in SYSDEPENDS go down by
1 for the following test case after an update is made to a table with update triggers defined
on it. Am not sure what kind of problems the missing dependnecy might cause.
> connect 'jdbc:derby:c:/dellater/db1;create=true';
> CREATE TABLE ATDC_13_TAB1(c11 int, c12 int);
> insert into ATDC_13_TAB1 values (1,11);
> create table ATDC_13_TAB2(c21 int, c22 int);
> insert into ATDC_13_TAB2 values (1,11);
> create table ATDC_13_TAB3(c31 int, c32 int);
> insert into ATDC_13_TAB3 values (1,11);
> create table ATDC_13_TAB1_backup(c11 int, c12 int);
> insert into ATDC_13_TAB1_backup values (1,11);
>                 create trigger ATDC_13_TAB1_trigger_1 after update 
>                 on ATDC_13_TAB1 for each row mode db2sql 
>                 INSERT INTO ATDC_13_TAB1_BACKUP(C11) 
>                 SELECT C21 from ATDC_13_TAB2;
>                  create trigger ATDC_13_TAB1_trigger_2 after update 
>                 on ATDC_13_TAB1 for each row mode db2sql 
>                 INSERT INTO ATDC_13_TAB1_BACKUP 
>                  SELECT C31, C32 from ATDC_13_TAB3;
> -- following shows 14 rows
> select * from sys.sysdepends;
> update ATDC_13_TAB1 set c12=11;
> -- following shows only 13 rows
> I tried this on 10.2 and 10.8 and saw the same behavior on both. It seems like the dependency
that gets dropped is between the stored prepared statement and a table. Have not spent enough
time to find out more details but I thought it is worth pointing out the behavior
> select * from sys.sysdepends;

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