DB Tsai created SPARK-26416:
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Summary: Refactor `ColumnPruning` from `Optimizer.scala` to
`ColumnPruning.scala`
Key: SPARK-26416
URL: https://issues.apache.org/jira/browse/SPARK-26416
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 2.4.0
Reporter: DB Tsai
Assignee: DB Tsai
Fix For: 3.0.0
As `Optimizer.scala` becomes bigger and bigger, it's hard to add new rules and
maintain them. We are refactoring out `ColumnPruning` from `Optimizer.scala` to
`ColumnPruning.scala` so it's easier to add new logics in `ColumnPruning`.
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