PostgreSQL Database Skill

Overview

This skill provides comprehensive PostgreSQL database operations including query execution, schema management, backup/restore, and performance monitoring.

Capabilities

1. SQL Query Execution (scripts/query.py)

Execute SQL queries against PostgreSQL databases with support for: - SELECT queries with result formatting - INSERT/UPDATE/DELETE operations - Transaction support - Query result export (JSON, CSV)

2. Schema Export (scripts/schema_export.py)

Export database schema information: - Table structures (columns, types, constraints) - Indexes and foreign keys - Views and triggers - Export to JSON/Markdown format

3. Database Backup (scripts/backup.py)

Database backup and restore operations: - Full database backup using pg_dump - Table-specific backup - Point-in-time recovery support - Backup rotation management

4. Performance Monitoring

Monitor database performance: - Query execution plans (EXPLAIN ANALYZE) - Index usage statistics - Table size and row counts - Connection pool status

Usage

Query Database

python scripts/query.py --dbname mydb --query "SELECT * FROM users LIMIT 10"

Export Schema

python scripts/schema_export.py --dbname mydb --output schema.json

Backup Database

python scripts/backup.py --dbname mydb --backup-dir /backups

Requirements

• PostgreSQL client tools (psql, pg_dump)
• Python 3.7+
• psycopg2 or asyncpg library

Configuration

Set environment variables: - PGHOST - Database host - PGPORT - Database port (default: 5432) - PGDATABASE - Database name - PGUSER - Database user - PGPASSWORD - Database password