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Performance · medium

2. B-Tree, Hash, and GIN Indexing Mechanics

Optimizing query access paths and execution plans.

1 min read2 questionsup to 50 XPtopic 2/3

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AI translates the explanation and quiz text while preserving code and answer scoring.

- B-Tree: Balanced tree for range and equality searches (default). - GIN (Generalized Inverted Index): Indexes composite items like JSONB, full-text search, and array columns. - EXPLAIN (ANALYZE, BUFFERS): Analyzes actual query plans, seq scans, index scans, and buffer cache hits.

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Check your understanding

  1. 1. Which index type is best suited for searching keys and values inside PostgreSQL JSONB columns?

  2. 2. What command inspects the actual execution plan and execution timing of a SQL query in PostgreSQL?

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