[HIVE-4345] Pushing down query conditions to support on-the-fly filtering at the file parsing

• Type: New Feature
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.10.0
• Component/s: Query Processor
• Labels: patch
• Assignee: Unassigned
• Reporter: Yifeng Geng
• Created: 12/Apr/13 05:51
• Updated: 21/Oct/22 07:31

Description

Serialize "predicate" conditions in query plan to MapredWork class, so the FileFormat class can use the conditions to do on-the-fly filtering on the files. It can improve the performance a lot for processsing certain binary files(NetCDF files for example).