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chore(release): prepare v0.3.0
- Update version to 0.3.0 - Add release notes for Join functionality - Update CHANGELOG.md
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‎CHANGELOG.md‎

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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [0.3.0] - 2026-01-08
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### Added
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- **Join Functionality Support**: Added `left_join()`, `inner_join()`, `right_join()`, and `full_join()` with `by` parameter and `on` expression support
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- Proper SQL `ON` clause generation for join conditions
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### Changed
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- **Dependencies**: `lru` upgraded from `0.12.5` to `0.16.3`
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- **Documentation**: Separated `INSTALL.md` from `README.md` for improved readability
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- Updated `AGENTS.md` with current project structure and conventions
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### Fixed
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- **CI/CD**: macOS release workflow - use `shasum -a 256` instead of unavailable `sha256sum`
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- **CI/CD**: Windows release workflow - disabled ccache to resolve resource file compilation conflicts
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- **CI/CD**: Added dynamic extension file path detection for Windows builds
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- **CI**: Added `contents: write` permission for GitHub Actions release deployment
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- **Testing**: Fixed C++ integration tests compilation errors from join refactoring
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- **Testing**: Updated join tests to use `Transpiler` directly
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- **SQL Generation**: Fixed correct `ON` clause generation for `by` parameter in joins
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### Refactored
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- **Code Quality**: Resolved all Clippy warnings
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- **Code Quality**: Removed unused code detected by cargo check
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- **Parser/SQL Generator**: Refactored join logic to separate `by` column from `on` expression handling
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- **Examples**: Fixed compilation errors from join refactoring
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### Security
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- Improved GitHub security workflow configuration
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## [Unreleased]
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### Added

‎Cargo.toml‎

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[package]
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name = "libdplyr"
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version = "0.2.0"
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version = "0.3.0"
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edition = "2021"
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authors = ["libdplyr contributors"]
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description = "A Rust-based transpiler that converts R dplyr syntax to SQL queries"

‎RELEASE_NOTES_v0.3.0.md‎

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# libdplyr v0.3.0 Release Notes
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**Release Date:** January 8, 2026
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---
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## Overview
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libdplyr v0.3.0 introduces **Join functionality** support, allowing you to perform SQL joins using familiar dplyr syntax. This release also includes code quality improvements, bug fixes, and dependency updates.
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---
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## What's New
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### ✨ Added: Join Functionality
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This release brings comprehensive join support to libdplyr:
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- **`left_join()`** - Keep all rows from the left table, matching rows from the right
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- **`inner_join()`** - Keep only rows with matches in both tables
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- **`right_join()`** - Keep all rows from the right table, matching rows from the left
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- **`full_join()`** - Keep all rows from both tables
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#### Join Syntax
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```r
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# Join with by parameter
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left_join(other, by = "id")
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inner_join(other, by = c("key1", "key2"))
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# Join with on expression
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left_join(other, on = "table1.id = table2.id")
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```
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#### Example
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```r
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select(name, dept) %>%
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left_join(salaries, by = "dept")
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```
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Transpiles to:
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```sql
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SELECT "name", "dept"
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FROM "data"
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LEFT JOIN "salaries" ON "data"."dept" = "salaries"."dept"
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```
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---
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## Changes
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### Dependencies Updated
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- **`lru`**: `0.12.5` → `0.16.3` (performance and compatibility improvements)
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### Documentation
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- Separated `INSTALL.md` from `README.md` for improved readability
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- Updated `AGENTS.md` with current project structure and conventions
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---
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## Fixed
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### Build & CI/CD
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- **macOS Release Workflow**: Fixed checksum verification by using `shasum -a 256` instead of unavailable `sha256sum`
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- **Windows Release Workflow**: Disabled ccache to resolve resource file compilation conflicts with Ninja
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- **Release Workflow**: Added dynamic extension file path detection for Windows builds
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- **CI Permissions**: Added `contents: write` permission for GitHub Actions release deployment
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### Testing
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- **C++ Integration Tests**: Fixed compilation errors introduced by join refactoring
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- **Join Tests**: Updated to use `Transpiler` directly for consistent testing
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### SQL Generation
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- **ON Clause Generation**: Fixed correct `ON` clause generation when using `by` parameter in joins
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---
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## Refactored
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### Code Quality
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- **Clippy Warnings**: Resolved all reported warnings for improved code quality
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- **Unused Code**: Removed unused fields and functions detected by cargo check
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- **Parser/SQL Generator**: Refactored join-related logic to separate `by` column from `on` expression handling
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### Examples
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- Fixed compilation errors in examples caused by join refactoring
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---
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## Security
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- **GitHub Security Workflow**: Improved security audit workflow configuration
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---
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## Compatibility
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| Component | Minimum Version | Notes |
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|-----------|----------------|-------|
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| Rust | 1.70+ | For `edition = 2021` |
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| DuckDB | 1.4.0+ | For extension compatibility |
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| CMake | 3.25+ | For building extension |
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---
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## Installation
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### Via Install Script (Linux/macOS)
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```bash
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curl -sSL https://raw.githubusercontent.com/mrchypark/libdplyr/main/install.sh | bash
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```
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### Via PowerShell (Windows)
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```powershell
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Irm https://raw.githubusercontent.com/mrchypark/libdplyr/main/install.ps1 | iex
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```
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### Via Cargo
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```bash
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cargo install libdplyr
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```
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### From Source
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```bash
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git clone https://github.com/mrchypark/libdplyr.git
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cd libdplyr
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cargo build --release
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```
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---
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## Resources
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- **Documentation**: [https://docs.rs/libdplyr](https://docs.rs/libdplyr)
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- **GitHub**: [https://github.com/mrchypark/libdplyr](https://github.com/mrchypark/libdplyr)
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- **Crates.io**: [https://crates.io/crates/libdplyr](https://crates.io/crates/libdplyr)
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---
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## Contributors
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Thank you to all contributors who made this release possible!
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---
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## Full Changelog
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```
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a07e5ec refactor: fix clippy warnings and code quality improvements
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2c49794 refactor: remove unused code detected by cargo check
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dab80d4 Merge pull request #3 from mrchypark/dependabot/cargo/lru-0.16.3
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a7e43e4 add agents for sub
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2d522ef refactor(docs): clean up documentation
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81a1397 refactor(tests): fix c++ integration tests compilation
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f0dc1d4 fix(examples): fix compilation errors from join refactor
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d9d7381 fix(test): use Transpiler directly in join tests
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5feca88 fix(sql_generator): generate correct ON clause for by parameter
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13b7e63 refactor(parser): separate by column from on expression for join
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3aa1284 feat: Add join functionality to libdplyr
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8cb5a42 build(deps): bump lru from 0.12.5 to 0.16.3
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aa8ab74 fix(ci): add contents: write permission to release workflow
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a43a65b fix(ci): dynamic extension file path for Windows release
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c989329 fix: resolve release workflow build errors
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7c9ffe1 fix security
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```
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---
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**Full changes since v0.2.0**: [Compare v0.2.0...v0.3.0](https://github.com/mrchypark/libdplyr/compare/v0.2.0...v0.3.0)

‎libdplyr_c/Cargo.toml‎

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[package]
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name = "libdplyr_c"
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version = "0.2.0"
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version = "0.3.0"
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edition = "2021"
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description = "C-compatible API for libdplyr DuckDB extension"
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license = "MIT"

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