In PostgreSQL, what is the effect of partition pruning during query execution on a partitioned table?

easy📝 Conceptual Q1 of 15

PostgreSQL - Table Partitioning

AIt disables indexes on partitions to improve performance

BIt merges all partitions into a single table before scanning

CIt duplicates data across partitions to speed up queries

DIt limits scanning to only relevant partitions based on query filters

Step-by-Step Solution

Solution:

Step 1: Understand partition pruning
Partition pruning allows PostgreSQL to skip scanning partitions that cannot contain matching rows based on the WHERE clause.
Step 2: Effect on query execution
This reduces I/O and improves query performance by scanning only relevant partitions.
Final Answer:
It limits scanning to only relevant partitions based on query filters -> Option D
Quick Check:
Partition pruning skips irrelevant partitions [OK]

Quick Trick: Partition pruning skips irrelevant partitions [OK]

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