[SPARK-30609] Allow default merge command resolution to be bypassed by DSv2 sources

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.4
• Fix Version/s: 3.0.0
• Component/s: SQL
• Target Version/s: 3.0.0
• Assignee: Tathagata Das
• Reporter: Tathagata Das
• Created: 22/Jan/20 20:57
• Updated: 23/Jan/20 03:47
• Resolved: 23/Jan/20 03:22

Description

Problem: Some DSv2 sources may want to customize the merge resolution logic. For example, a table that can accept any schema (TableCapability.ACCEPT_ANY_SCHEMA) may want to allow certain merge queries that are blocked (that is, throws AnalysisError) by the default resolution logic. So there should be a way to completely bypass the merge resolution logic in the Analyzer.

Potential solution: Skip resolving the merge expressions if the target is a DSv2 table with ACCEPT_ANY_SCHEMA capability.

Issue Links

• links to: GitHub Pull Request #27326