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What is the primary function of ts_headline in PostgreSQL's full-text search?

easy📝 Conceptual Q1 of 15
PostgreSQL - Full-Text Search
What is the primary function of ts_headline in PostgreSQL's full-text search?
ATo index text data for faster searching
BTo generate snippets of text with search terms highlighted
CTo convert text to lowercase for uniformity
DTo remove stop words from the text
Step-by-Step Solution
Solution:

  1. Step 1: Understand ts_headline

    This function extracts snippets from a text column and highlights the search terms found in the text.

  2. Step 2: Differentiate from other functions

    Unlike indexing or text normalization, ts_headline focuses on presenting highlighted excerpts.

  3. Final Answer:

    To generate snippets of text with search terms highlighted -> Option B

  4. Quick Check:

    ts_headline highlights terms in snippets [OK]
Quick Trick: ts_headline creates highlighted text snippets [OK]
Common Mistakes:
  • Confusing ts_headline with text indexing functions
  • Thinking ts_headline modifies the original text permanently

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