Szehon Ho created SPARK-52417:
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Summary: Simplify Table properties handling in View Schema
Evolution Mode
Key: SPARK-52417
URL: https://issues.apache.org/jira/browse/SPARK-52417
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 4.0.0
Reporter: Szehon Ho
When a View is created, ex CREATE VIEW v (a1, a2) AS select c1, c2, it needs to
save both set of columns (alias and query output).
It saves the alias as the View Schema, and the query output as a table property
like (c1, 0) (c2, 1)
In the new Schema Evolution mode, we never allow the alias (view schema == view
query output schema). Every time we detect schema change, we sync the view's
schema with view query schema, keeping the invariant.
So we can simplify the update in Schema Evolution mode to not update the table
properties, and do not use them where they are currently used, in describe,
etc..
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