[Solved] In PostgreSQL, what is the primary impact of a CTE being materialized during query execution? — Ans: The CTE result is computed once and stored temporarily for reuse | PostgreSQL

PostgreSQL - Common Table Expressions

In PostgreSQL, what is the primary impact of a CTE being materialized during query execution?

AThe CTE is always inlined into the main query for optimization

BThe CTE result is computed once and stored temporarily for reuse

CThe CTE is ignored if not referenced in the main query

DThe CTE result is permanently saved in the database

Step-by-Step Solution

Solution:

Step 1: Understand materialization
Materialization means the CTE's result is computed and stored temporarily.
Step 2: Effect on execution
This allows reuse of the CTE result without recomputing it multiple times.
Final Answer:
The CTE result is computed once and stored temporarily for reuse -> Option B
Quick Check:
Materialized CTEs store intermediate results [OK]

Quick Trick: Materialized CTEs cache results for reuse [OK]

Common Mistakes:

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In PostgreSQL, what is the primary impact of a CTE being materialized during query execution?