[IMPALA-3725] Support Kudu UPSERT in Impala

• Type: New Feature
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 2.6.0
• Fix Version/s: Impala 2.8.0
• Component/s: Frontend
• Labels: kudu ramp-up
• Target Version: Kudu_Impala
• Assignee: Thomas Tauber-Marshall
• Reporter: Dimitris Tsirogiannis
• Created: 10/Jun/16 18:38
• Updated: 14/Mar/18 23:16
• Resolved: 05/Nov/16 17:13

Description

Add UPSERT to Impala. This also includes adding/updating relevant functional tests, stress tests, and query generator tests. It may impact our statistics story too (TBD, stats work tracked by IMPALA-2830).

This should add syntax which works like INSERT for Kudu tables, but specifying that Kudu perform an UPSERT rather than an INSERT.

UPSERT INTO table [( column [, ...] )] VALUES ( value-expression [,...] )
UPSERT INTO table [( column [, ...] )] SELECT select-expression