You are viewing a plain text version of this content. The canonical link for it is here.
Posted to derby-dev@db.apache.org by "Mike Matrigali (JIRA)" <ji...@apache.org> on 2014/09/25 01:17:34 UTC
[jira] [Commented] (DERBY-6602) LuceneQueryVTI handles NULL key
values inconsistently
[ https://issues.apache.org/jira/browse/DERBY-6602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14147066#comment-14147066 ]
Mike Matrigali commented on DERBY-6602:
---------------------------------------
lucene support added in 10.11 so adding backport reject for 10.10 and before
> LuceneQueryVTI handles NULL key values inconsistently
> -----------------------------------------------------
>
> Key: DERBY-6602
> URL: https://issues.apache.org/jira/browse/DERBY-6602
> Project: Derby
> Issue Type: Bug
> Components: Tools
> Affects Versions: 10.11.1.1
> Reporter: Knut Anders Hatlen
> Assignee: Rick Hillegas
> Labels: derby_backport_reject_10_10
> Fix For: 10.11.1.1
>
> Attachments: derby-6602-01-aa-handleNullKeys.diff
>
>
> If there's an integer key column with a NULL value, the Lucene query will return a fake key value (0) rather than NULL. The document id and score will be correct. Example:
> {noformat}
> ij> create table t1(x int, c clob);
> 0 rows inserted/updated/deleted
> ij> insert into t1 values (null, 'abc'), (null, 'def');
> 2 rows inserted/updated/deleted
> ij> call lucenesupport.createindex('app', 't1', 'c', null, 'x');
> 0 rows inserted/updated/deleted
> ij> select * from table(t1__c('abc or def', null, 3, null)) tc;
> X |DOCUMENTID |SCORE
> ---------------------------------------
> 0 |0 |0.35355338
> 0 |1 |0.35355338
> 2 rows selected
> {noformat}
> If the key column is a string type, the returned key is correct (NULL). The document id is sometimes correct and sometimes NULL, and the score seems to be NULL always. Example:
> {noformat}
> ij> create table t2(x varchar(10), c clob);
> 0 rows inserted/updated/deleted
> ij> insert into t2 values (null, 'abc'), (null, 'def');
> 2 rows inserted/updated/deleted
> ij> call lucenesupport.createindex('app', 't2', 'c', null, 'x');
> 0 rows inserted/updated/deleted
> ij> select * from table(t2__c('abc or def', null, 3, null)) tc;
> X |DOCUMENTID |SCORE
> --------------------------------------
> NULL |NULL |NULL
> NULL |1 |NULL
> 2 rows selected
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)