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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/05/12 03:27:04 UTC
[jira] [Assigned] (SPARK-20718) FileSourceScanExec with different
filter orders should be the same after canonicalization
[ https://issues.apache.org/jira/browse/SPARK-20718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-20718:
------------------------------------
Assignee: (was: Apache Spark)
> FileSourceScanExec with different filter orders should be the same after canonicalization
> -----------------------------------------------------------------------------------------
>
> Key: SPARK-20718
> URL: https://issues.apache.org/jira/browse/SPARK-20718
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Zhenhua Wang
>
> Since `constraints` in `QueryPlan` is a set, the order of filters can differ. Usually this is ok because of canonicalization. However, in `FileSourceScanExec`, its data filters and partition filters are sequences, and their orders are not canonicalized. So `def sameResult` returns different results for different orders of data/partition filters. This leads to, e.g. different decision for `ReuseExchange`, and thus results in unstable performance.
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