[SPARK-13404] Create the variables for input when it's used

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: SQL
• Epic Link: Whole stage codegen
• Assignee: Davies Liu
• Reporter: Davies Liu
• Created: 19/Feb/16 17:55
• Updated: 08/Mar/16 04:09
• Resolved: 08/Mar/16 04:09

Description

Right now, we create the variables in the first operator (usually InputAdapter), they could be wasted if most of rows after filtered out immediately.

We should defer that until they are used by following operators.

Issue Links

• links to: [Github] Pull Request #11274 (davies)