[IMPALA-4809] Add codegen GetConstant() for query options

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0
• Fix Version/s: Impala 2.9.0
• Component/s: Backend
• Target Version: Impala 2.9.0
• Assignee: Michael Ho
• Reporter: Daniel Hecht
• Created: 24/Jan/17 18:36
• Updated: 13/Feb/17 19:25
• Resolved: 13/Feb/17 19:25

Description

For IMPALA-2020 and other decimal related changes, we'll want a way to eliminate runtime overhead of query options on the decimal evaluation paths. Let's add a way to insert codegen constants from query option values.