Josh Rosen created SPARK-37379:
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Summary: Add tree pattern pruning to CTESubstitution rule
Key: SPARK-37379
URL: https://issues.apache.org/jira/browse/SPARK-37379
Project: Spark
Issue Type: Sub-task
Components: Optimizer
Affects Versions: 3.1.0
Reporter: Josh Rosen
Assignee: Josh Rosen
I propose to add tree pattern pruning to the CTESubstitution rule in order to
skip tree traversal when the tree does not contain an UnresolvedWith expression.
This is motivated by profiling a job which uses DataFrame APIs to incrementally
construct a huge query plan (200k+ nodes): each API call results in eager
re-analysis of the plan, of which CTESubstitution accounts for the majority of
the analysis time. This query didn't contain CTEs, so skipping the
CTESubstitution significantly speeds up analysis.
I plan to submit a patch for this.
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