[KUDU-1144] Impala needs to check result of AddConjunctPredicate

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Private Beta
• Component/s: impala
• Target Version/s: Public beta
• Assignee: David Alves
• Reporter: Todd Lipcon
• Created: 15/Sep/15 03:23
• Updated: 16/Sep/15 19:05
• Resolved: 16/Sep/15 19:05

Description

We're calling AddConjunctPredicate, without checking the result. In the case of double columns, we often see the double literal as a float, and Kudu doesn't do type promotion for these predicate calls. It's likely returning an error, which Impala is ignoring. This then cases Impala to think it has pushed down a predicate when in fact it has not.