Yin Huai created SPARK-12957:
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Summary: Derive and propagate data constrains in logical plan
Key: SPARK-12957
URL: https://issues.apache.org/jira/browse/SPARK-12957
Project: Spark
Issue Type: New Feature
Components: SQL
Reporter: Yin Huai
Based on the semantic of a query plan, we can derive data constrains (e.g. if a
filter defines {{a > 10}}, we know that the output data of this filter satisfy
the constrain of {{a > 10}} and {{a is not null}}). We should build a framework
to derive and propagate constrains in the logical plan, which can help us to
build more advanced optimizations.
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