Zhenhua Wang created SPARK-20718:
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Summary: FileSourceScanExec with different filter orders should
have the same result
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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