[CARBONDATA-2297] Support SEARCH_MODE for basic filter query

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Assignee: Manhua Jiang
• Reporter: Manhua Jiang
• Created: 31/Mar/18 03:33
• Updated: 30/Aug/18 11:56
• Resolved: 05/Apr/18 15:21

Description

Currently, tasks could be jammed subjected to available core number if query generates many tasks. For basic filter query(with limited result rows), we could add a new strategy to assign only one task with multiple splits each node and scan all the splits in parallel(get the result immediately and instead of using iterator)

Issue Links

• relates to: CARBONDATA-2726 Carbon search enabled feature not working with Spark 2.2
• relates to: CARBONDATA-2728 Concurrent select query when executed on table after set search mode enabled throws divide by zero exception
• relates to: CARBONDATA-2486 set search mode information is not updated in the documentation
• links to: GitHub Pull Request #2123