pg_ivm - PostgreSQL Incremental View Maintenance

Giriş

Açıklaması şöyle

an extension that transforms materialized views into self-updating, always-fresh data structures that update instantly as your base data changes.

Açıklaması şöyle

Under the Hood: How pg_ivm Works

When you create an incremental materialized view, pg_ivm automatically:

1. Installs triggers on all referenced base tables

2. Captures changes through INSERT/UPDATE/DELETE monitoring

3. Calculates deltas to determine the minimal impact

4. Updates the view with only the necessary changes

REFRESH MATERIALIZED VIEW CONCURRENTLY - The Non-Blocking Approach

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Açıklaması şöyle. 

The Good: Allows queries during refresh (requires a unique index)

The Bad: Still recomputes the entire view from scratch

The Reality: Better UX, but still expensive and slow for large datasets.

Örnek

Şöyle yaparız

REFRESH MATERIALIZED VIEW CONCURRENTLY sales_summary;

REFRESH MATERIALIZED VIEW - Manual Refresh

Giriş

Açıklaması şöyle. Alternatif olarak REFRESH MATERIALIZED VIEW CONCURRENTLY kullanılabilir

The Good: Simple and straightforward

The Bad: Locks the entire view during refresh, blocking all queries

The Reality: Your users stare at loading spinners while the view rebuilds

Örnek

Şöyle yaparız

REFRESH MATERIALIZED VIEW sales_summary;