[CARBONDATA-2902] Fix showing negative pruning result for explain command

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.5.0
• Assignee: Manhua Jiang
• Reporter: Manhua Jiang
• Created: 31/Aug/18 04:02
• Updated: 12/Sep/18 08:09
• Resolved: 03/Sep/18 15:14

Description

 when CACHE_LEVEL is BLOCK or carbon data file is LegacyStore,   pruned result of default datamap are assigned with blocklet_id = -1, which means all blocklets in block need to be scanned. But explain command takes pruned result size as blocklets hit.

If only 2 of 3 blocklet in one block is hit, negative pruning result  `1 (block) - 2(blocklet）= -1 ` occur

Issue Links

• links to: GitHub Pull Request #2676
• links to: GitHub Pull Request #2696