[DRILL-2843] Reading empty CSV file fails with error (rather than yielding zero rows)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.0
• Component/s: Storage - Text & CSV
• Assignee: Steven Phillips
• Reporter: Daniel Barclay
• Created: 21/Apr/15 22:04
• Updated: 15/Sep/15 19:33
• Resolved: 11/Sep/15 23:49

Description

Reading an empty CSV file (an empty file with a name ending with ".csv") fails with an internal error rather than yielding zero rows:

> SELECT * FROM `empty_file.csv`;
Query failed: SYSTEM ERROR: Unexpected exception during fragment initialization: Incoming endpoints 1 is greater than number of row groups 0

[4e7c7167-51eb-485c-a07b-d41c2f63a670 on dev-linux2:31010]
Error: exception while executing query: Failure while executing query. (state=,code=0)
>

Issue Links

• relates to: DRILL-2759 Wrong result on count(*) from empty csv file
• relates to: DRILL-3557 Reading empty CSV file fails with SYSTEM ERROR