[PHOENIX-1594] Using KeyOnlyFilter for simple query of select count(1) from <table>

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.3.0
• Assignee: James R. Taylor
• Reporter: Jeffrey Zhong
• Created: 16/Jan/15 18:50
• Updated: 21/Nov/15 02:15
• Resolved: 10/Feb/15 18:37

Description

I found that underlying scan for query "select count(1) or count from <table>" still project all columns.

It should be fast if we use KeyOnlyFilter for this simple query.