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https://issues.apache.org/jira/browse/FLINK-1150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14165164#comment-14165164
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ASF GitHub Bot commented on FLINK-1150:
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GitHub user fhueske opened a pull request:
https://github.com/apache/incubator-flink/pull/146
[FLINK-1150] Fix output size estimate of FilterNode.
FilterNode implicitly sets the estimated output size to unknown (-1) while
adjusting the cardinality by a factor of 0.5.
This fix changes the estimated output size proportional to cardinality.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/fhueske/incubator-flink fixFilterSizeEstimate
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-flink/pull/146.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #146
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commit 913f1face084b82001df12a1bf21b7c785e0cb25
Author: Fabian Hueske <fhue...@apache.org>
Date: 2014-10-09T13:21:20Z
[FLINK-1150] Fix size estimate for FilterNode. Data size changes
proportional to cardinality.
----
> FilterNode set estimated data size to unknown
> ---------------------------------------------
>
> Key: FLINK-1150
> URL: https://issues.apache.org/jira/browse/FLINK-1150
> Project: Flink
> Issue Type: Bug
> Components: Optimizer
> Affects Versions: 0.6.1-incubating, 0.7-incubating
> Reporter: Fabian Hueske
> Assignee: Fabian Hueske
>
> The default selectivity estimate of a Filter is 0.5.
> During optimization, the FilterNode correctly adapts the estimated
> cardinality but sets the estimated data size to unknown.
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