Tathagata Das created SPARK-30609:
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Summary: Allow default merge command resolution to be bypassed by
DSv2 sources
Key: SPARK-30609
URL: https://issues.apache.org/jira/browse/SPARK-30609
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.4.4
Reporter: Tathagata Das
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.
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