Tejas Patil created SPARK-20758:
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Summary: Add Constant propagation optimization
Key: SPARK-20758
URL: https://issues.apache.org/jira/browse/SPARK-20758
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.1.1
Reporter: Tejas Patil
Priority: Minor
Constant propagation involves substituting attributes which can be statically
evaluated in expressions. Its a pretty common optimization in compilers world.
eg.
{noformat}
SELECT * FROM table WHERE i = 5 AND j = i + 3
{noformat}
can be re-written as:
{noformat}
SELECT * FROM table WHERE i = 5 AND j = 8
{noformat}
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