Indexes for Performance
Index Types
| Type | Use Case |
|---|---|
| B-tree (default) | Equality, range queries |
| Hash | Equality only (rare) |
| GiST | Geometric, full-text |
| GIN | Arrays, JSONB, full-text |
| BRIN | Large sorted tables |
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LearnStep 1 of 2
PostgreSQL Indexes
Learning Objectives
- •Create various index types
- •Analyze query plans
- •Optimize performance
Lesson Outline
LearnStep 1/2
PostgreSQL Indexes
python
Analyzing Query Performance
python
Index Selection Guidelines
- Index columns used in WHERE, JOIN, ORDER BY
- Index foreign keys for fast joins
- Use composite index when filtering on multiple columns together
- Order matters: (a, b) index helps WHERE a=1 AND b=2, or WHERE a=1
- Don't over-index: each index slows writes
- Use partial indexes for commonly filtered subsets
Monitoring Index Usage
python