Intermediate LevelPostgreSQL

What is Table Access Method (Table AM) API introduced in PostgreSQL 12?

Q: What is Table Access Method (Table AM) API introduced in PostgreSQL 12?

PostgreSQL 12 introduced the **Table Access Method (Table AM)** API, decoupling the core query engine from underlying physical table storage implementations: ### Purpose: Allows third-party extensions to implement custom table storage engines (such as columnar storage for OLAP analytics or in-memory tables) while remaining compatible with standard SQL queries! Key Takeaway: Table AM API allows plugging custom storage engines like columnar format into PostgreSQL.

❓ Interview Prompt: Explain Table Access Method (Table AM) API, abstracting heap table storage, and pluggable columnar storage engines (ZedStore).

PostgreSQL 12 introduced the Table Access Method (Table AM) API, decoupling the core query engine from underlying physical table storage implementations:

Purpose:

Allows third-party extensions to implement custom table storage engines (such as columnar storage for OLAP analytics or in-memory tables) while remaining compatible with standard SQL queries!

Code Implementation Example

sql

-- Inspect registered table access methods
SELECT amname, handler FROM pg_am WHERE amtype = 't';

💡Querying registered Table Access Methods from pg_am catalog.

🎯 Interview Key Takeaway

Table AM API allows plugging custom storage engines like columnar format into PostgreSQL.

#Table AM#Storage Engines#Architecture#Intermediate

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