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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4032) Record not found in some SQL
Date Wed, 06 May 2009 23:28:30 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706657#action_12706657
] 

Kathey Marsden commented on DERBY-4032:
---------------------------------------

I wonder if there was any progress on creating a reproduction for the cause of the corruption
on this issue.   If not, I think we should go ahead an close cannot reproduce and open an
improvement request for SYSCS_UTIL.SYSCS_CHECK_TABLE as Rick suggests.  The issue can then
be reopened if we find a way to reproduce the corrupt index.




> Record not found in some SQL
> ----------------------------
>
>                 Key: DERBY-4032
>                 URL: https://issues.apache.org/jira/browse/DERBY-4032
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.3.2.1
>         Environment: Windows XP
>            Reporter: Chip Hartney
>         Attachments: OrderEntryDB-base.zip, OrderEntryDB-seg0-part1.zip, OrderEntryDB-seg0-part2.zip,
OrderEntryDB-seg0-part3.zip, OrderEntryDB-seg0-part4.zip, OrderEntryDB-seg0-part5.zip, OrderEntryDB-seg0-part6.zip,
OrderEntryDB-seg0-part7.zip
>
>
> Per discussion at http://www.nabble.com/Record-not-found-in-some-SQL---Bug--td21700110.html...
> I have a "Product" table with a "Num" column that contains a record that is only accessible
by some SQL and not others.  I have tested this by JDBC access from my Java app as well was
from IJ directly.
> ij> select "Num", length("Num") as "Len" from app."Product" where "Num" like 'HG1549%';
> Num            |Len
> ----------------------------
> HG15490        |7
> HG15493        |7
> HG15497        |7   <== Found as expected
> HG15499        |7
> 4 rows selected
> ij> select "Num" from app."Product" where "Num" = 'HG15490';
> Num
> ----------------
> HG15490  <== Found as expected
> 1 row selected
> ij> select "Num" from app."Product" where "Num" = 'HG15493';
> Num
> ----------------
> HG15493  <== Found as expected
> 1 row selected
> ij> select "Num" from app."Product" where "Num" = 'HG15499';
> Num
> ----------------
> HG15499  <== Found as expected
> 1 row selected
> ij> select "Num" from app."Product" where "Num" = 'HG15497';
> Num
> ----------------
> 0 rows selected  <== Not found!!!
> What could possibly hide the 'HG15497' record from the last SELECT?
> And it's not just a matter of equality versus inequality...as the following SQL does
return the record:
>     SELECT I."STYLE" FROM TEMP."ZJVINV2" AS I INNER JOIN APP."Product" AS P ON I."STYLE"
= P."Num" WHERE I."STYLE" = 'HG15497'; 

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