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From "Kurt Huwig (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2549) ArrayIndexOutOfBoundsException in SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE
Date Thu, 26 Apr 2007 10:52:15 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12491961
] 

Kurt Huwig commented on DERBY-2549:
-----------------------------------

My patch does not compress the full database. I will limit the case when there are 111 compressable
elements to 100, so that they fit into the result array. But after that, the remaining 11
elements are still not compressed. If I run INPLACE_COMPRESS again, my debugging output shows
me that it compressed just these 11 elements. A third or more runs will yield no further changes
to the database.

Therefore I guess that the limitation to 100 is somehow arbitrary and does not apply to my
specifiy database.

Comparing to DERBY-606, the size of my database is 159MB vs several GB and it contains only
301.451 elements vs 60 million.

> ArrayIndexOutOfBoundsException in SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE
> -------------------------------------------------------------------------
>
>                 Key: DERBY-2549
>                 URL: https://issues.apache.org/jira/browse/DERBY-2549
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.2.2.0
>         Environment: Linux 2.6.x, JRE 1.5.0_b7
>            Reporter: Kurt Huwig
>         Attachments: 2549-histogram.png, derby-2549-v1.diff, DerbyDiskSpaceDiag.java
>
>
> I am doing this in my code:
> CALL SYSCS_UTIL.SYSCS_INPLACE_COMPRESS_TABLE('SPONTS','" + "journal".toUpperCase(Locale.US)
+ "',1,1,1)")
> ("journal" is actually a String-variable, but I replaced it here for easier understanding)
> Sometime - not always - I am getting this exception:
> java.sql.SQLException: The exception 'java.lang.ArrayIndexOutOfBoundsException: 100'
was thrown while evaluating an expression. SQLSTATE: XJ001:
> Java exception: '100: java.lang.ArrayIndexOutOfBoundsException'.
>         at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
>         at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
>         at org.apache.derby.client.am.Statement.execute(Unknown Source)
> [...]
> Caused by: org.apache.derby.client.am.SqlException: The exception 'java.lang.ArrayIndexOutOfBoundsException:
100' was thrown while evaluating an expression.
>  SQLSTATE: XJ001: Java exception: '100: java.lang.ArrayIndexOutOfBoundsException'.
>         at org.apache.derby.client.am.Statement.completeExecute(Unknown Source)
>         at org.apache.derby.client.net.NetStatementReply.parseEXCSQLSTTreply(Unknown
Source)
>         at org.apache.derby.client.net.NetStatementReply.readExecuteCall(Unknown Source)
>         at org.apache.derby.client.net.StatementReply.readExecuteCall(Unknown Source)
>         at org.apache.derby.client.net.NetStatement.readExecuteCall_(Unknown Source)
>         at org.apache.derby.client.am.Statement.readExecuteCall(Unknown Source)
>         at org.apache.derby.client.am.Statement.flowExecute(Unknown Source)
>         at org.apache.derby.client.am.Statement.executeX(Unknown Source)
>         ... 12 more

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