Using regular views expecting performance improvement

Use materialized views for performance, regular views for security/abstraction

Regular views don't cache results. They execute the underlying query every time. If the query is slow, the view is slow. Use materialized views to pre-compute and store results for fast queries.

High

graph TD

A[Regular View] --> B[Executes query every time]

B --> C[No performance benefit]

D[Materialized View] --> E[Stores pre-computed results]

E --> F[Fast queries]

style C fill:#FFB6C6

style F fill:#90EE90

Forgetting to refresh materialized views

Schedule automatic refresh with pg_cron or application scheduler

Materialized views don't update automatically. Data becomes stale. Users see outdated information. Solution: Schedule automatic refresh (hourly, daily) or refresh on-demand after data changes.

Critical

sequenceDiagram

participant Data

participant MV

participant Users

Data->>Data: Changes accumulate

Note over MV: Stale data

Users->>MV: Query

MV-->>Users: Outdated results

Note over MV: Need REFRESH!

Not indexing materialized views

Create indexes on materialized views just like regular tables

Materialized views are tables. Without indexes, queries do full table scans. Slow. Solution: CREATE INDEX on commonly filtered/sorted columns. Treat materialized views like regular tables for indexing.

High