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What is the main purpose of the ts_headline function in PostgreSQL?

easy📝 Conceptual Q11 of 15
PostgreSQL - Full-Text Search
What is the main purpose of the ts_headline function in PostgreSQL?
ATo remove stop words from a text
BTo highlight search terms in a text for easier identification
CTo convert text to lowercase
DTo count the number of words in a text
Step-by-Step Solution
Solution:

  1. Step 1: Understand the function's role

    ts_headline is designed to highlight parts of text that match a search query.

  2. Step 2: Compare options with function purpose

    Only To highlight search terms in a text for easier identification describes highlighting search terms, which matches ts_headline's purpose.

  3. Final Answer:

    To highlight search terms in a text for easier identification -> Option B

  4. Quick Check:

    Highlighting = D [OK]
Quick Trick: Remember: ts_headline highlights matched words in text [OK]
Common Mistakes:
  • Confusing ts_headline with text transformation functions
  • Thinking it counts words or changes case
  • Assuming it removes words instead of highlighting

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