feat: add sql.js dialect

[ymc9]

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[claude]

Claude finished @ymc9's task —— View job

---

Code Review for SQL.js Dialect

Review Progress

• Read and understand all changed files
• Analyze code quality and architecture patterns
• Check for potential bugs and issues
• Evaluate performance considerations
• Review security concerns
• Assess test coverage and quality
• Provide comprehensive feedback

---

Overall Assessment

This is a well-structured implementation of a SQL.js dialect for Kysely that follows established patterns in the ZenStack ecosystem. The code is clean, follows TypeScript best practices, and includes comprehensive tests. However, there are several areas for improvement.

✅ Strengths

Code Quality & Architecture:

• Follows the established Kysely dialect pattern correctly with proper separation of concerns
• Clean TypeScript implementation with appropriate type definitions
• Consistent with ZenStack monorepo structure and conventions
• Good use of dependency injection pattern in the dialect configuration

Testing:

• Comprehensive test suite covering CRUD operations
• Proper test setup with schema creation/teardown
• Good test data variety and edge cases
• Uses established testing patterns (vitest, proper beforeAll/afterEach hooks)

Package Setup:

• Proper monorepo integration with workspace dependencies
• Correct build configuration (tsup with both CJS/ESM)
• Appropriate peer dependencies setup
• Follows established eslint/typescript configurations

⚠️ Issues & Concerns

1. Package Naming Inconsistency

File: packages/dialects/sql.js/package.json:2

"name": "@zenstackhq/kysely-sql-js"

The package name doesn't align with the folder structure. Should be @zenstackhq/dialect-sqljs or similar to match ZenStack conventions.

2. Missing Error Handling

File: packages/dialects/sql.js/src/connection.ts:14-23
The executeQuery method lacks proper error handling for SQL execution failures. SQL.js can throw exceptions that should be caught and wrapped appropriately.

3. Parameter Type Safety Issue

File: packages/dialects/sql.js/src/connection.ts:14

this.database.exec(compiledQuery.sql, compiledQuery.parameters as BindParams);

The type cast as BindParams bypasses type safety. This could lead to runtime errors if parameters don't match expected format.

4. Resource Management Concern

File: packages/dialects/sql.js/src/driver.ts:32

async destroy(): Promise<void> {
    this.config.sqlJs.close();
}

The destroy() method assumes the database is always closeable, but there's no check if it's already closed or null.

5. Test Code Issues

File: packages/dialects/sql.js/test/getting-started/person-repository.test.ts:85

console.log(created);

Console.log statement left in test code - should be removed.

File: packages/dialects/sql.js/test/getting-started/person-repository.ts:44

export async function createPersons(persons: NewPerson[]) {
    return await db.insertInto('person').values(persons).executeTakeFirstOrThrow();
}

This function returns only the first result for multiple inserts, which is misleading. Should return all created records.

6. Missing Documentation

File: packages/dialects/sql.js/README.md:1
The README only contains a fork attribution. Missing:

• Usage instructions
• Configuration options
• Examples
• Limitations/warnings about testing-only usage

🔄 Performance Considerations

Positive:

• Efficient data transformation in connection.ts:19-20 using functional approach
• Proper use of BigInt for affected rows count
• No unnecessary async operations

Areas for Improvement:

• Consider connection pooling for better resource management (though SQL.js is in-memory, so less critical)
• The row transformation could be optimized for large result sets

🔒 Security Assessment

Low Risk: SQL.js runs in-memory and is intended for testing, so security surface is minimal.

Considerations:

• SQL injection protection relies on Kysely's parameter binding (✅ Good)
• No external network access or file system operations
• Appropriate for testing/development only (as documented in dialect comment)

📊 Test Coverage Assessment

Coverage: Excellent

• All major CRUD operations tested
• Transaction handling via beforeAll/afterEach
• Edge cases like nullable fields
• Multiple insert scenarios

Missing:

• Error condition testing (invalid SQL, constraint violations)
• Transaction rollback scenarios
• Large dataset performance testing

🚀 Recommendations

High Priority:

1. Fix package naming - Align with ZenStack conventions
2. Add error handling in SqlJsConnection.executeQuery()
3. Remove console.log from tests
4. Fix createPersons return type issue

Medium Priority:

1. Add comprehensive README with usage examples
2. Add error condition tests
3. Improve type safety in parameter handling
4. Add resource cleanup checks

Low Priority:

1. Consider connection pooling patterns for consistency
2. Add performance benchmarks for large datasets
3. Document limitations more explicitly

📋 Sample Fixes

Error Handling:

async executeQuery<R>(compiledQuery: CompiledQuery<unknown>): Promise<QueryResult<R>> {
    try {
        const executeResult = this.database.exec(compiledQuery.sql, compiledQuery.parameters as BindParams);
        const rowsModified = this.database.getRowsModified();
        return {
            numAffectedRows: BigInt(rowsModified),
            rows: executeResult
                .map(({ columns, values }) =>
                    values.map((row) => columns.reduce((acc, column, i) => ({ ...acc, [column]: row[i] }), {}) as R),
                )
                .flat(),
        };
    } catch (error) {
        throw new Error(`SQL execution failed: ${error.message}`);
    }
}

Package Name Fix:

{
    "name": "@zenstackhq/dialect-sqljs",
    // ... rest of package.json
}

---

This is a solid foundation for a SQL.js dialect with good testing practices. The main issues are fixable and mostly relate to polish and error handling rather than fundamental architectural problems.

[Copilot]

Pull Request Overview

This PR adds a new sql.js dialect for Kysely, enabling SQL.js database support. The implementation provides a complete Kysely dialect package with proper TypeScript configuration, testing setup, and build tooling.

• Implements SqlJsDialect, SqlJsDriver, and SqlJsConnection classes for sql.js integration
• Adds comprehensive test suite with example person repository demonstrating CRUD operations
• Sets up standard package configuration with TypeScript, ESLint, Vitest, and tsup

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
package.json	Package configuration with dependencies and build scripts
src/dialect.ts	Main dialect class implementing Kysely's Dialect interface
src/driver.ts	Database driver handling connections and transactions
src/connection.ts	Connection implementation for executing queries
src/types.ts	TypeScript interface definitions
test/	Comprehensive test suite with example usage
Config files	Standard TypeScript, ESLint, Vitest, and tsup configurations

[claude]

Claude finished @ymc9's task —— View job

---

Code Review for SQL.js Dialect

Review Progress

• Read and understand all changed files
• Analyze code quality and architecture patterns
• Check for potential bugs and issues
• Evaluate performance considerations
• Review security concerns
• Assess test coverage and quality
• Provide comprehensive feedback

---

Overall Assessment

This is a well-structured implementation of a SQL.js dialect for Kysely that follows established patterns in the ZenStack ecosystem. The code is clean, follows TypeScript best practices, and includes comprehensive tests. However, there are several areas for improvement.

✅ Strengths

Code Quality & Architecture:

• Follows the established Kysely dialect pattern correctly with proper separation of concerns
• Clean TypeScript implementation with appropriate type definitions
• Consistent with ZenStack monorepo structure and conventions
• Good use of dependency injection pattern in the dialect configuration

Testing:

• Comprehensive test suite covering CRUD operations
• Proper test setup with schema creation/teardown
• Good test data variety and edge cases
• Uses established testing patterns (vitest, proper beforeAll/afterEach hooks)

Package Setup:

• Proper monorepo integration with workspace dependencies
• Correct build configuration (tsup with both CJS/ESM)
• Appropriate peer dependencies setup
• Follows established eslint/typescript configurations

⚠️ Issues & Concerns

1. Package Naming Inconsistency

File: packages/dialects/sql.js/package.json:2

"name": "@zenstackhq/kysely-sql-js"

The package name doesn't align with the folder structure. Should be @zenstackhq/dialect-sqljs or similar to match ZenStack conventions.

2. Missing Error Handling

File: packages/dialects/sql.js/src/connection.ts:14-23
The executeQuery method lacks proper error handling for SQL execution failures. SQL.js can throw exceptions that should be caught and wrapped appropriately.

3. Parameter Type Safety Issue

File: packages/dialects/sql.js/src/connection.ts:14

this.database.exec(compiledQuery.sql, compiledQuery.parameters as BindParams);

The type cast as BindParams bypasses type safety. This could lead to runtime errors if parameters don't match expected format.

4. Resource Management Concern

File: packages/dialects/sql.js/src/driver.ts:32

async destroy(): Promise<void> {
    this.config.sqlJs.close();
}

The destroy() method assumes the database is always closeable, but there's no check if it's already closed or null.

5. Test Code Issues

File: packages/dialects/sql.js/test/getting-started/person-repository.test.ts:85

console.log(created);

Console.log statement left in test code - should be removed.

File: packages/dialects/sql.js/test/getting-started/person-repository.ts:44

export async function createPersons(persons: NewPerson[]) {
    return await db.insertInto('person').values(persons).executeTakeFirstOrThrow();
}

This function returns only the first result for multiple inserts, which is misleading. Should return all created records.

6. Missing Documentation

File: packages/dialects/sql.js/README.md:1
The README only contains a fork attribution. Missing:

• Usage instructions
• Configuration options
• Examples
• Limitations/warnings about testing-only usage

🔄 Performance Considerations

Positive:

• Efficient data transformation in connection.ts:19-20 using functional approach
• Proper use of BigInt for affected rows count
• No unnecessary async operations

Areas for Improvement:

• Consider connection pooling for better resource management (though SQL.js is in-memory, so less critical)
• The row transformation could be optimized for large result sets

🔒 Security Assessment

Low Risk: SQL.js runs in-memory and is intended for testing, so security surface is minimal.

Considerations:

• SQL injection protection relies on Kysely's parameter binding (✅ Good)
• No external network access or file system operations
• Appropriate for testing/development only (as documented in dialect comment)

📊 Test Coverage Assessment

Coverage: Excellent

• All major CRUD operations tested
• Transaction handling via beforeAll/afterEach
• Edge cases like nullable fields
• Multiple insert scenarios

Missing:

• Error condition testing (invalid SQL, constraint violations)
• Transaction rollback scenarios
• Large dataset performance testing

🚀 Recommendations

High Priority:

1. Fix package naming - Align with ZenStack conventions
2. Add error handling in SqlJsConnection.executeQuery()
3. Remove console.log from tests
4. Fix createPersons return type issue

Medium Priority:

1. Add comprehensive README with usage examples
2. Add error condition tests
3. Improve type safety in parameter handling
4. Add resource cleanup checks

Low Priority:

1. Consider connection pooling patterns for consistency
2. Add performance benchmarks for large datasets
3. Document limitations more explicitly

📋 Sample Fixes

Error Handling:

async executeQuery<R>(compiledQuery: CompiledQuery<unknown>): Promise<QueryResult<R>> {
    try {
        const executeResult = this.database.exec(compiledQuery.sql, compiledQuery.parameters as BindParams);
        const rowsModified = this.database.getRowsModified();
        return {
            numAffectedRows: BigInt(rowsModified),
            rows: executeResult
                .map(({ columns, values }) =>
                    values.map((row) => columns.reduce((acc, column, i) => ({ ...acc, [column]: row[i] }), {}) as R),
                )
                .flat(),
        };
    } catch (error) {
        throw new Error(`SQL execution failed: ${error.message}`);
    }
}

Package Name Fix:

{
    "name": "@zenstackhq/dialect-sqljs",
    // ... rest of package.json
}

---

This is a solid foundation for a SQL.js dialect with good testing practices. The main issues are fixable and mostly relate to polish and error handling rather than fundamental architectural problems.

---

[claude]

Claude finished @ymc9's task —— View job

---

Code Review for SQL.js Dialect

Review Progress

• Read and understand all changed files
• Analyze code quality and architecture patterns
• Check for potential bugs and issues
• Evaluate performance considerations
• Review security concerns
• Assess test coverage and quality
• Provide comprehensive feedback

---

Overall Assessment

This is a well-structured implementation of a SQL.js dialect for Kysely that follows established patterns in the ZenStack ecosystem. The code is clean, follows TypeScript best practices, and includes comprehensive tests. However, there are several areas for improvement.

✅ Strengths

Code Quality & Architecture:

• Follows the established Kysely dialect pattern correctly with proper separation of concerns
• Clean TypeScript implementation with appropriate type definitions
• Consistent with ZenStack monorepo structure and conventions
• Good use of dependency injection pattern in the dialect configuration

Testing:

• Comprehensive test suite covering CRUD operations
• Proper test setup with schema creation/teardown
• Good test data variety and edge cases
• Uses established testing patterns (vitest, proper beforeAll/afterEach hooks)

Package Setup:

• Proper monorepo integration with workspace dependencies
• Correct build configuration (tsup with both CJS/ESM)
• Appropriate peer dependencies setup
• Follows established eslint/typescript configurations

⚠️ Issues & Concerns

1. Package Naming Inconsistency

File: packages/dialects/sql.js/package.json:2

"name": "@zenstackhq/kysely-sql-js"

The package name doesn't align with the folder structure. Should be @zenstackhq/dialect-sqljs or similar to match ZenStack conventions.

2. Missing Error Handling

File: packages/dialects/sql.js/src/connection.ts:14-23
The executeQuery method lacks proper error handling for SQL execution failures. SQL.js can throw exceptions that should be caught and wrapped appropriately.

3. Parameter Type Safety Issue

File: packages/dialects/sql.js/src/connection.ts:14

this.database.exec(compiledQuery.sql, compiledQuery.parameters as BindParams);

The type cast as BindParams bypasses type safety. This could lead to runtime errors if parameters don't match expected format.

4. Resource Management Concern

File: packages/dialects/sql.js/src/driver.ts:32

async destroy(): Promise<void> {
    this.config.sqlJs.close();
}

The destroy() method assumes the database is always closeable, but there's no check if it's already closed or null.

5. Test Code Issues

File: packages/dialects/sql.js/test/getting-started/person-repository.test.ts:85

console.log(created);

Console.log statement left in test code - should be removed.

File: packages/dialects/sql.js/test/getting-started/person-repository.ts:44

export async function createPersons(persons: NewPerson[]) {
    return await db.insertInto('person').values(persons).executeTakeFirstOrThrow();
}

This function returns only the first result for multiple inserts, which is misleading. Should return all created records.

6. Missing Documentation

File: packages/dialects/sql.js/README.md:1
The README only contains a fork attribution. Missing:

• Usage instructions
• Configuration options
• Examples
• Limitations/warnings about testing-only usage

🔄 Performance Considerations

Positive:

• Efficient data transformation in connection.ts:19-20 using functional approach
• Proper use of BigInt for affected rows count
• No unnecessary async operations

Areas for Improvement:

• Consider connection pooling for better resource management (though SQL.js is in-memory, so less critical)
• The row transformation could be optimized for large result sets

🔒 Security Assessment

Low Risk: SQL.js runs in-memory and is intended for testing, so security surface is minimal.

Considerations:

• SQL injection protection relies on Kysely's parameter binding (✅ Good)
• No external network access or file system operations
• Appropriate for testing/development only (as documented in dialect comment)

📊 Test Coverage Assessment

Coverage: Excellent

• All major CRUD operations tested
• Transaction handling via beforeAll/afterEach
• Edge cases like nullable fields
• Multiple insert scenarios

Missing:

• Error condition testing (invalid SQL, constraint violations)
• Transaction rollback scenarios
• Large dataset performance testing

🚀 Recommendations

High Priority:

1. Fix package naming - Align with ZenStack conventions
2. Add error handling in SqlJsConnection.executeQuery()
3. Remove console.log from tests
4. Fix createPersons return type issue

Medium Priority:

1. Add comprehensive README with usage examples
2. Add error condition tests
3. Improve type safety in parameter handling
4. Add resource cleanup checks

Low Priority:

1. Consider connection pooling patterns for consistency
2. Add performance benchmarks for large datasets
3. Document limitations more explicitly

📋 Sample Fixes

Error Handling:

async executeQuery<R>(compiledQuery: CompiledQuery<unknown>): Promise<QueryResult<R>> {
    try {
        const executeResult = this.database.exec(compiledQuery.sql, compiledQuery.parameters as BindParams);
        const rowsModified = this.database.getRowsModified();
        return {
            numAffectedRows: BigInt(rowsModified),
            rows: executeResult
                .map(({ columns, values }) =>
                    values.map((row) => columns.reduce((acc, column, i) => ({ ...acc, [column]: row[i] }), {}) as R),
                )
                .flat(),
        };
    } catch (error) {
        throw new Error(`SQL execution failed: ${error.message}`);
    }
}

Package Name Fix:

{
    "name": "@zenstackhq/dialect-sqljs",
    // ... rest of package.json
}

---

This is a solid foundation for a SQL.js dialect with good testing practices. The main issues are fixable and mostly relate to polish and error handling rather than fundamental architectural problems.