PostgreSQL Extensions Skill Skill

PostgreSQL Extensions Skill

Atomic skill for essential extensions

Overview

Production-ready patterns for installing and using key PostgreSQL extensions.

Prerequisites

PostgreSQL 16+
Superuser or extension privileges
Extension packages installed

Parameters

parameters:
  operation:
    type: string
    required: true
    enum: [install, configure, use]
  extension:
    type: string
    enum: [pg_stat_statements, pg_trgm, uuid_ossp, hstore, postgis]

Quick Reference

Install Extensions

CREATE EXTENSION IF NOT EXISTS pg_stat_statements;
CREATE EXTENSION IF NOT EXISTS pg_trgm;
CREATE EXTENSION IF NOT EXISTS uuid_ossp;
CREATE EXTENSION IF NOT EXISTS hstore;

-- Check installed
SELECT extname, extversion FROM pg_extension;

pg_stat_statements

-- Top queries
SELECT query, calls, mean_exec_time
FROM pg_stat_statements
ORDER BY total_exec_time DESC LIMIT 10;

-- Reset stats
SELECT pg_stat_statements_reset();

pg_trgm (Fuzzy Search)

-- Similarity search
SELECT name, similarity(name, 'postgresql') as sim
FROM products WHERE name % 'postgresql';

-- Create trigram index
CREATE INDEX idx_trgm ON products USING GIN (name gin_trgm_ops);

uuid-ossp

SELECT uuid_generate_v4();

hstore

SELECT 'key=>value'::hstore;
SELECT data->'key' FROM table_with_hstore;

Essential Extensions

| Extension | Use Case | |-----------|----------| | pg_stat_statements | Query analysis | | pg_trgm | Fuzzy text search | | uuid-ossp | UUID generation | | hstore | Key-value pairs | | postgis | Geospatial data | | pgcrypto | Encryption |

Troubleshooting

| Problem | Cause | Solution | |---------|-------|----------| | Extension not found | Not installed | apt install postgresql-16-* | | Permission denied | Not superuser | GRANT CREATE ON DATABASE | | Version mismatch | Old extension | ALTER EXTENSION ... UPDATE |

Usage

Skill("postgresql-extensions")

Agent Skills: PostgreSQL Extensions Skill

Skill Files