🚀 v1.0.0: Lightning-Fast PostgreSQL Test Databases Go Stable!

pgdbtemplate v1.0.0 - First Stable Release

We're thrilled to announce the first stable release of pgdbtemplate, a high-performance Go library that revolutionizes PostgreSQL testing by leveraging template databases for lightning-fast test execution.

🎯 What is pgdbtemplate?

pgdbtemplate provides a production-ready solution for creating isolated PostgreSQL test databases using PostgreSQL's native template database functionality. Instead of running expensive migrations for each test, it creates databases from a pre-migrated template, delivering significant performance improvements.

✨ Key Highlights

🚀 Performance That Scales

• 1.2-1.6x faster than traditional database creation approaches
• Consistent performance regardless of schema complexity
• 17% less memory usage per operation
• Thread-safe concurrent test database management
• Scales to 500+ databases with ease

🔧 Production-Ready Features

• Multiple driver support: Works with both pgx/v5 and database/sql + lib/pq
• Testcontainers integration for containerized testing environments
• Flexible migration runners with automatic file ordering
• Connection string validation and PostgreSQL-specific optimizations
• Comprehensive cleanup with automatic resource management

🛡️ Stability & Reliability

• Fully thread-safe with mutex-protected operations
• Unique database naming with collision-free generation
• Proper resource cleanup prevents connection leaks
• Extensive test coverage with real-world scenarios
• Go 1.20+ compatibility

📊 Real-World Performance

Based on benchmarks with Apple M4 Pro:

Schema Complexity	Traditional	pgdbtemplate	Performance Gain
1 Table	~28.9ms	~28.2ms	1.03x faster
3 Tables	~39.5ms	~27.6ms	1.43x faster
5 Tables	~43.1ms	~28.8ms	1.50x faster

Scaling Benefits:

• 20 databases: 32% faster (906.8ms → 613.8ms)
• 500 databases: 34% faster (22.31s → 14.82s)

🚀 Getting Started

Install with: go get github.com/andrei-polukhin/pgdbtemplate

Choose your PostgreSQL driver:

• pgdbtemplate-pgx - For pgx/v5 with native connection pooling
• pgdbtemplate-pq - For database/sql with lib/pq

See the README.md for comprehensive usage examples and quick start guides.

🔄 Migration Guide

From Development Versions

If you've been using development versions (pre-v1.0.0), the API is now stable and ready for production use. The core interfaces and functionality remain the same, with improvements to:

• Error handling and resource cleanup
• Documentation and examples
• Performance optimizations
• Thread safety guarantees

Breaking Changes

None. This is the first stable release establishing the baseline API.

📚 Documentation & Examples

• README.md: Comprehensive usage examples and best practices
• docs/ADVANCED.md: Custom providers and migration runners
• docs/COMPARISON.md: Detailed comparison with other solutions
• docs/BENCHMARKS.md: Performance methodology and results

🙏 Acknowledgments

Special thanks to:

• The PostgreSQL community for template database functionality
• Contributors who helped shape the API and functionality
• Early adopters who provided valuable feedback

📦 What's Included

• Core library with template database management
• Two driver implementations (pgx and pq)
• Comprehensive test suite with 95%+ coverage
• Extensive documentation and examples
• Docker-based testing infrastructure

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Ready to supercharge your PostgreSQL testing? Get started with go get github.com/andrei-polukhin/pgdbtemplate and experience the future of fast, reliable database testing!

For questions, issues, or contributions, visit github.com/andrei-polukhin/pgdbtemplate.

🚀 v0.7.0 - Driver-Agnostic Architecture

What's New

Major Refactoring: Made pgdbtemplate fully driver-agnostic with unified architecture

Key Changes

• ✅ Unified API: Single pgdbtemplate package now supports both pgx and lib/pq drivers
• 🗑️ Removed Duplication: Eliminated separate pgdbtemplate-pgx and pgdbtemplate-pq packages
• 📚 Better Documentation: Added contributors file and improved README structure
• 🧪 Enhanced Testing: Consolidated test infrastructure with improved coverage

Migration Guide

• Replace pgdbtemplate.NewPgxConnectionProvider imports with pgdbtemplate-pgx
• Replace pgdbtemplate.NewStandardConnectionProvider imports with pgdbtemplate-pq
• Breaking changes

Breaking Changes

• Removed separate driver packages (now integrated)
• Updated import paths required

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Full Changelog: v0.6.1...v0.7.0

🚀 v0.6.0 - Major Architectural Refactoring for Enterprise Flexibility

🚀 v0.6.0 - Major Architectural Refactoring for Enterprise Flexibility

This release introduces significant architectural improvements focused on enterprise-grade flexibility, reduced dependencies, and better driver abstraction.

✨ Features

• Driver-Agnostic Error Handling: Added GetNoRowsSentinel() interface method for consistent error handling across PostgreSQL drivers
• Zero-Runtime Dependencies: Extracted SQL formatting into internal/formatters package, eliminating runtime dependency on lib/pq
• Enhanced Architecture: Core template_manager.go is now fully driver-agnostic for SQL formatting and error handling
• Future-Proof Design: Easier to add support for additional PostgreSQL drivers

🔧 Improvements

• SQL Safety: Copied pq.QuoteIdentifier and pq.QuoteLiteral implementations to avoid runtime dependencies
• Comprehensive Testing: Added full test coverage for the new formatters package
• License Compliance: Updated LICENSE with proper attribution for copied code
• Code Quality: Improved architectural cleanliness and separation of concerns

⚠️ Breaking Changes

• Connection String Validation Removed: Users must ensure valid PostgreSQL connections are provided
• Interface Changes: Removed GetConnectionString() method from ConnectionProvider interface

📚 Migration Guide

For Custom Connection Providers:

• Remove GetConnectionString() method implementations (no longer needed)
• Ensure your connection strings are valid PostgreSQL URIs

🧪 Testing

• All existing tests pass
• Added comprehensive tests for internal/formatters package
• Race condition tests included
• Integration tests with PostgreSQL 15

🙏 Acknowledgements

Thanks to Allan Vidal for his architectural feedback on this project.

🚀 v0.5.0: Performance Optimizations & Comprehensive Cleanup Tracking

🎉 Major Performance & Reliability Release

This release delivers substantial performance improvements and comprehensive cleanup tracking with zero breaking changes.

🚀 Performance Improvements

• 56% faster database creation (28.3ms vs 44.0ms)
• ~30% faster query performance with pq.QuoteLiteral optimization
• ~6-10% faster database drops by removing unnecessary IF EXISTS clauses
• 17% less memory usage per operation
• Superior concurrent performance: 78 ops/sec vs 69 ops/sec traditional

🔒 Enhanced Thread Safety & Cleanup

• Comprehensive test database tracking with sync.Map for automatic cleanup
• Global atomic counters to prevent database name collisions across instances
• Batched connection termination for efficient bulk cleanup operations
• Enhanced error resilience in cleanup operations
• Production-ready cleanup management for large test suites

📊 Validated Performance Gains

• 1.56x faster overall database creation
• Scales better with complexity: 1.09x → 1.20x → 1.59x faster as schema grows
• Consistent ~28ms performance regardless of schema complexity
• Memory efficient: 17% reduction in per-operation memory usage

🧪 Testing & Quality

• 93.0% test coverage maintained with comprehensive new test suites
• New cleanup tracking tests ensuring reliable database management
• Enhanced benchmark suite with realistic test scenarios
• All tests passing with improved concurrent safety

📚 Documentation Updates

• Accurate performance metrics updated throughout documentation
• Current benchmark results reflecting actual measured performance
• Comprehensive BENCHMARKS.md with detailed analysis and methodology

🔄 Upgrade Path

Zero breaking changes - existing code works unchanged. Simply update your dependency:

go get github.com/andrei-polukhin/pgdbtemplate@v0.5.0

🚀 v0.4.0: Dual Driver Support with pgx Integration and 93.7% Test Coverage

🚀 v0.4.0: Dual Driver Support with pgx Integration

This major release introduces dual PostgreSQL driver support, allowing users to choose between the standard database/sql interface with lib/pq or the high-performance pgx driver with advanced features like connection pooling.

✨ What's New

🔥 Dual Driver Architecture

• pgx Driver Support: Full integration with pgx v5.6.0 for advanced PostgreSQL features
• Connection Pooling: Built-in pgxpool support for high-performance applications
• Backward Compatibility: Existing database/sql code continues to work unchanged
• Unified Interface: Clean abstraction layer supporting both driver types

📈 Enhanced Test Coverage

• 93.7% Coverage: Comprehensive test suite exceeding 90% target
• Dual Driver Testing: Full test coverage for both lib/pq and pgx drivers
• Integration Tests: Real database testing scenarios with proper cleanup
• Performance Tests: Thread-safe benchmarks with atomic counters

🏗️ Improved Architecture

• Organized Providers: Clean separation with connection_provider_pq.go and connection_provider_pgx.go
• Connection Utilities: Robust ReplaceDatabaseInConnectionString function
• Enhanced Error Handling: Support for both sql.ErrNoRows and pgx.ErrNoRows
• Better Resource Management: Proper cleanup patterns and connection lifecycle

📚 Complete Documentation

• Driver Comparison Guide: Help users choose the right driver
• Connection Pooling Examples: Advanced pgx configuration patterns
• Migration Guide: Easy transition from single to dual driver setup
• Performance Best Practices: Optimization recommendations

🛠️ Usage Examples

Standard database/sql (lib/pq)

provider := &pgdbtemplate.StandardConnectionProvider{
    ConnectionString: "postgres://user:pass@localhost/db?sslmode=disable",
}

Advanced pgx with Connection Pooling:

provider := &pgdbtemplate.PgxConnectionProvider{
    ConnectionString: "postgres://user:pass@localhost/db?sslmode=disable",
    Options: &pgdbtemplate.PgxOptions{
        MaxConns:        30,
        MinConns:        5,
        MaxConnLifetime: 30 * time.Minute,
    },
}

📊 Performance & Reliability

• Thread-Safe Benchmarks: Atomic counters for accurate performance measurements
• Connection Pooling: Significant performance improvements for high-load scenarios
• Robust Error Handling: Comprehensive error scenarios and recovery patterns
• Resource Cleanup: Automatic cleanup prevents connection leaks

🔧 Technical Improvements

New Files Added:

• connection_provider_pgx.go - pgx driver implementation
• connection_provider_pgx_options.go - pgx configuration options
• connection_string.go - connection string utilities
• Comprehensive test files for all new functionality

Dependencies Added:

• github.com/jackc/pgx/v5 v5.6.0
• github.com/jackc/pgxpool/v5 v5.2.0

🚨 Breaking Changes

• None! This release maintains full backward compatibility
• Existing code using NewStandardConnectionProvider works unchanged
• New pgx features are opt-in additions

📈 Metrics

• Test Coverage: 93.7% (up from 68.8%)
• New Test Cases: 150+ additional test scenarios
• Performance: Up to 40% faster with pgx connection pooling
• Memory Usage: Reduced allocation overhead with pgx

🙏 Migration Guide

For Existing Users

No changes required! Your existing code continues to work as before.

To Use New pgx Features

Simply replace your connection provider with the new pgx version for enhanced performance and connection pooling capabilities.

🔗 Full Changelog

• feat: add pgx driver support with connection pooling
• refactor: reorganize connection providers and add utilities
• test: enhance test coverage to 93.7% with comprehensive test suite
• perf: improve benchmark stability and accuracy
• docs: comprehensive README update with dual driver examples
• test: complete test infrastructure migration and cleanup

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Full Changelog: v0.3.0...v0.4.0

v0.3.0: Enhanced Performance, Comprehensive Testing, and Documentation Overhaul

🚀 pgdbtemplate v0.3.0 - Enhanced Performance, Comprehensive Testing, and Documentation Overhaul

This major release brings significant improvements to code quality, testing coverage, performance infrastructure, and documentation organization. The library maintains its core performance characteristics while adding robust error handling and comprehensive benchmarking capabilities.

🎯 Key Highlights

• 📊 Comprehensive Benchmarking Infrastructure - Complete performance testing suite with automation
• 🔒 Enhanced Connection Management - Functional options pattern with connection pooling controls
• 🧪 Improved Test Coverage - From 90% to 90.6% with comprehensive error path testing
• 📚 Documentation Restructure - Professional docs/ organization with advanced scenarios
• 🐛 Critical Bug Fixes - Resolved concurrent testing race conditions
• ⚡ Performance Validated - 1.3-1.5x faster than traditional approaches confirmed

✨ New Features

📊 Benchmarking Infrastructure

• NEW: benchmark_test.go - Comprehensive performance testing suite
  • Traditional vs template database creation comparisons
  • Concurrent and sequential scaling benchmarks
  • Template initialization cost measurements
• NEW: docs/BENCHMARKS.md - Detailed performance analysis and methodology
• NEW: scripts/run_benchmarks.sh - Automated benchmark execution
• NEW: .gitignore - Clean repository management

🔧 Connection Provider Enhancements

• NEW: connection_providers_options.go - Functional options pattern
  • WithMaxOpenConns() - Configure maximum open connections
  • WithMaxIdleConns() - Configure maximum idle connections
  • WithConnMaxLifetime() - Configure connection maximum lifetime
  • WithConnMaxIdleTime() - Configure connection maximum idle time
• REMOVED: PingContext() method - Simplified DatabaseConnection interface

📚 Documentation Overhaul

• NEW: docs/ADVANCED.md - Advanced scenarios and complex use cases
• MOVED: CONTRIBUTING.md → docs/CONTRIBUTING.md - Better organization
• ENHANCED: README.md - Improved structure and navigation
• NEW: Professional docs/ directory structure

🐛 Critical Bug Fixes

🏃 Concurrency Issues

• FIXED: Channel reuse race condition in concurrent testing
• FIXED: Proper channel synchronization for parallel database operations
• ENHANCED: Thread-safe template database management

🔧 Error Handling

• IMPROVED: Comprehensive error checking across all operations
• STANDARDIZED: Quicktest assertion patterns throughout test suite
• ENHANCED: Inline error checks for cleaner, maintainable code

📈 Performance & Quality Improvements

🧪 Test Coverage Enhancements

• INCREASED: Test coverage from 90.0% to 90.6%
• ADDED: Comprehensive error path testing
• IMPROVED: Migration runner edge case coverage
• ENHANCED: Cleanup scenarios test readability

📝 Code Quality

• STANDARDIZED: Comment formatting with proper punctuation
• REPLACED: Error assertion antipatterns with qt.ErrorMatches
• INLINED: Error checks for improved readability
• REMOVED: Repetitive test code and redundant scenarios

⚡ Performance Validation

• CONFIRMED: 1.3-1.5x performance improvement over traditional approaches
• VALIDATED: Consistent ~29ms template database creation
• VERIFIED: Superior concurrent performance and thread safety

🔄 Breaking Changes

⚠️ Interface Changes

• REMOVED: PingContext() method from DatabaseConnection interface
  • Migration: Remove any PingContext() calls - no replacement needed
  • Reason: Simplified interface, ping functionality not essential for template operations

📁 File Reorganization

• MOVED: CONTRIBUTING.md → docs/CONTRIBUTING.md
  • Migration: Update any links to contribution guidelines
• NEW: docs/ directory structure - existing links may need updates

📊 Performance Benchmarks

Current benchmark results on Apple M4 Pro:

Schema Size	Traditional	Template	Performance Gain
1 Table	31.5ms	28.7ms	1.10x faster
3 Tables	40.2ms	28.5ms	1.41x faster
5 Tables	45.2ms	31.9ms	1.42x faster

Concurrent Performance: Template approach 23% faster with superior thread safety.

See docs/BENCHMARKS.md for comprehensive analysis and methodology.

🛠️ Development Experience

🚀 New Tooling

# Run comprehensive benchmarks
./scripts/run_benchmarks.sh

# Set custom connection string
export POSTGRES_CONNECTION_STRING="postgres://user:pass@localhost:5432/postgres"