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Code Keys/PySpark Academy/Module 22/Lesson 175
PYSPARK • LESSON 175

Inspecting Physical Execution Plans with explain()

How do we print the full parsed, analyzed, optimized, and physical execution plans generated by Catalyst?

Expert⏱ 2 Minutes⭐ 1000 XP
🤔 THE QUESTION

How do we print the full parsed, analyzed, optimized, and physical execution plans generated by Catalyst?

💡 WHAT IS IT?

explain(extended=True) displays Catalyst's step-by-step optimization plan from logical AST to physical JVM bytecode.

🎯 WHAT IS IT USED FOR?

Diagnosing join strategies, verifying predicate pushdown, and identifying whole-stage code generation stages.

💻 EXAMPLE
df.explain(extended=True)

🎯 Mission Objectives

Practice typing production-grade PySpark code for Inspecting Physical Execution Plans with explain().

  • ✓ Execute explain(extended=True)
  • ✓ Inspect Catalyst optimizer physical plan
  • ✓ Verify predicate pushdown and join strategies
🚀 Start Mission
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