[Solved] What is the main purpose of partition pruning in PostgreSQL? — Ans: To skip scanning partitions that cannot contain matching rows | PostgreSQL

PostgreSQL - Table Partitioning

What is the main purpose of partition pruning in PostgreSQL?

ATo merge all partitions into one table

BTo create new partitions automatically

CTo skip scanning partitions that cannot contain matching rows

DTo backup partitions separately

Step-by-Step Solution

Solution:

Step 1: Understand partition pruning concept
Partition pruning means the database avoids scanning partitions that do not match the query filter.
Step 2: Identify the main benefit
This skipping reduces query time by focusing only on relevant partitions.
Final Answer:
To skip scanning partitions that cannot contain matching rows -> Option C
Quick Check:
Partition pruning = skip irrelevant partitions [OK]

Quick Trick: Partition pruning skips irrelevant partitions to speed queries [OK]

Common Mistakes:

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What is the main purpose of partition pruning in PostgreSQL?