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Posted to derby-dev@db.apache.org by "Knut Anders Hatlen (JIRA)" <ji...@apache.org> on 2009/09/15 10:55:57 UTC
[jira] Commented: (DERBY-4376) Simple select runs forever
[ https://issues.apache.org/jira/browse/DERBY-4376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755424#action_12755424 ]
Knut Anders Hatlen commented on DERBY-4376:
-------------------------------------------
The query uses a MultiProbeTableScanResultSet, which was introduced in 10.4.1.3 as part of DERBY-47.
> Simple select runs forever
> --------------------------
>
> Key: DERBY-4376
> URL: https://issues.apache.org/jira/browse/DERBY-4376
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.3.1.4, 10.5.3.0, 10.6.0.0
> Reporter: Knut Anders Hatlen
>
> On Derby 10.3.1.4 and later, I see that evaluating the statements below in ij apparently makes Derby go into an infinite loop. The select statement ran for two hours until I aborted it. I do not see this problem on Derby 10.2.2.0 or earlier.
> ij> create table t(x int primary key);
> 0 rows inserted/updated/deleted
> ij> prepare ps as 'select * from t where x=? or x=?';
> ij> execute ps using 'values (cast(null as int), 0)';
> IJ WARNING: Autocommit may close using result set
> X
> -----------
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