[IMPALA-1438] Zero-row insert creates empty data file

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.0
• Fix Version/s: Impala 2.2
• Labels: ramp-up
• Assignee: Juan Yu
• Reporter: Juan Yu
• Created: 30/Oct/14 23:23
• Updated: 04/Jan/17 23:58
• Resolved: 12/Dec/14 05:11

Description

when exec an insert query, even the query insert 0 row to the table, a new data file will be generated on HDFS, 0 byte. this could cause lots of 0 byte file on HDFS.
It doesn't matter if the table has partition or not.

If the query doesn't have any data to insert, it shouldn't generate a new file.