[IMPALA-9132] Explain statements should not cause NPE in LogLineageRecord()

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: Impala 3.4.0
• Component/s: Backend
• Labels: crash
• Epic Color: ghx-label-8
• Assignee: Anurag Mantripragada
• Reporter: Anurag Mantripragada
• Created: 06/Nov/19 16:09
• Updated: 07/Nov/19 03:02
• Resolved: 07/Nov/19 03:02

Description

For DDLs, LogLineageRecord() adds certain fields to the lineageGraph in the backend. However, explain statements do not have a catalogOpExecutor causing a NPE.

We should, in general, avoid creating lineage records for Explain as Atlas currently does not use them.