Which of the following is the correct syntax to perform a Bitmap Index Scan in a PostgreSQL EXPLAIN query output?

easy📝 Syntax Q12 of 15

PostgreSQL - Performance Tuning

AIndex Scan on table_name (cost=0.29..8.31 rows=5 width=12)

BBitmap Heap Scan on index_name (cost=0.29..8.31 rows=5 width=12)

CBitmap Index Scan on index_name (cost=0.29..8.31 rows=5 width=12)

DSeq Scan on index_name (cost=0.29..8.31 rows=5 width=12)

Step-by-Step Solution

Solution:

Step 1: Identify Bitmap Index Scan syntax
Bitmap Index Scan appears as "Bitmap Index Scan on index_name" in EXPLAIN output.
Step 2: Differentiate from other scans
Bitmap Heap Scan fetches rows using bitmap, Index Scan and Seq Scan are different methods.
Final Answer:
Bitmap Index Scan on index_name (cost=0.29..8.31 rows=5 width=12) -> Option C
Quick Check:
Bitmap Index Scan syntax = Bitmap Index Scan on index_name (cost=0.29..8.31 rows=5 width=12) [OK]

Quick Trick: Look for 'Bitmap Index Scan on' in EXPLAIN output [OK]

Common Mistakes:

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