Why does ts_rank sometimes assign the same rank to different documents even if their content differs?

hard📝 Conceptual Q10 of 15

PostgreSQL - Full-Text Search

Why does ts_rank sometimes assign the same rank to different documents even if their content differs?

ABecause it ignores word frequency

BBecause it uses a normalization factor that can cause ties

CBecause it only compares document length

DBecause it ranks documents randomly

Step-by-Step Solution

Solution:

Step 1: Understand ts_rank normalization
ts_rank applies normalization factors that can scale scores, sometimes causing ties.
Step 2: Evaluate other options
It does consider word frequency; does not rank randomly; length alone is not the only factor.
Final Answer:
Because it uses a normalization factor that can cause ties -> Option B
Quick Check:
Normalization causes ties = True [OK]

Quick Trick: Normalization can cause equal ranks for different docs [OK]

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