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Posted to derby-dev@db.apache.org by "Kristian Waagan (JIRA)" <de...@db.apache.org> on 2006/08/10 15:02:14 UTC
[jira] Commented: (DERBY-1473) Add cut-off and truncation logic to
streaming classes in the embedded driver
[ http://issues.apache.org/jira/browse/DERBY-1473?page=comments#action_12427201 ]
Kristian Waagan commented on DERBY-1473:
----------------------------------------
Posting the results from my final derbyall runs for the patches 1a and 2a combined:
* Solaris 10 (x86)
JDK 1.3 : 22 failures, 557 tests
JDK 5.0 : 1 failure, 691 tests
upgradeTests/Upgrade_10_1_10_2.java
JDK 6 : 2 failures, 734 tests
store/OnlineBackupTest1.java
upgradeTests/Upgrade_10_1_10_2.java
* Linux (Gentoo 2.6.16, amd64)
JDK 1.4 : 0 failures, 685 tests
JDK 6 : 3 failures, 653 tests, derbynetmats skipped
derbynetclientmats/jdbcapi/XATest.java
lang/prediacatPushdown.sql
lang/wisconsin.java
I believe the upgradetest is failing because if my environment (not finding the jars).
The JDK1.3 errors are not due to my patch, but I will follow up on them.
predicatePushdown and wisconsin seem to choose different query plans.
Not sure about XATest, must look into the diff.
> Add cut-off and truncation logic to streaming classes in the embedded driver
> ----------------------------------------------------------------------------
>
> Key: DERBY-1473
> URL: http://issues.apache.org/jira/browse/DERBY-1473
> Project: Derby
> Issue Type: Improvement
> Components: JDBC
> Affects Versions: 10.2.0.0
> Reporter: Kristian Waagan
> Assigned To: Kristian Waagan
> Fix For: 10.2.0.0
>
> Attachments: derby-1473-1a-streaming.diff, derby-1473-1a-streaming.stat, derby-1473-2a-streamingtests.diff, derby-1473-2a-streamingtests.stat
>
>
> When streaming data to Derby, the application stream will be wrapped in a Derby-specific stream to convert the data to the correct representation. At a minimum, this consists of getting the data to the on-disk format used by Derby.
> The wrapping stream can be extended to provide the following features at an earlier stage:
> a) Data cut-off when the maximum allowed size is exceeded
> b) Truncation of trailing blanks where allowed
> Both features can reduce the amount of data needed to be kept in memory on insertion.
> Implementing this will require additional column/data type information in the streaming class(es). The implementation must be able to handle streams for which the length is specified and also streams with unknown/unspecified length.
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