[SPARK-20758] Add Constant propagation optimization

• Type: New JIRA Project
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.1
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Tejas Patil
• Reporter: Tejas Patil
• Created: 16/May/17 03:09
• Updated: 18/May/18 03:31
• Resolved: 29/May/17 10:22

Description

Constant propagation involves substituting attributes which can be statically evaluated in expressions. Its a pretty common optimization in compilers world.

eg.

SELECT * FROM table WHERE i = 5 AND j = i + 3

can be re-written as:

SELECT * FROM table WHERE i = 5 AND j = 8

Issue Links

• links to: [Github] Pull Request #17993 (tejasapatil)