[IMPALA-5371] Document TIMESTAMP support for Kudu tables

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.9.0
• Fix Version/s: Impala 2.9.0
• Component/s: Docs
• Epic Color: ghx-label-8
• Assignee: John Russell
• Reporter: John Russell
• Created: 25/May/17 17:42
• Updated: 08/Jun/17 18:33
• Resolved: 08/Jun/17 18:33

Description

New functionality from IMPALA-5137.

"No TIMESTAMP" restriction to be lifted in several places.

Some changes to precision to document under TIMESTAMP page. (A query won't get back exactly the same value that gets inserted into a Kudu table.)

Possible performance caveat if there's significant overhead converting on the way in and out.

Don't think much impact on using date/time functions on TIMESTAMP from Kudu tables. Possibly some nuances related to rounding and extraction functions.