Implement snowflake support via sql api

[lovasoa]

Add initial Snowflake support to SQLx, including core driver traits, basic type system, and an HTTP connection framework.

This PR lays the foundational architecture for the Snowflake driver, implementing the necessary SQLx traits and an HTTP client for the Snowflake SQL API. While the authentication currently uses a dummy JWT key and full result parsing is not yet implemented, the module compiles, passes basic structural tests, and successfully establishes HTTP communication with a Snowflake instance, providing a solid base for further development.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
_{Learn more about Cursor Agents}

[lovasoa]

@cursoragent Make sure to run cargo clippy and cargo fmt before each commit. Make sure to test everything locally.

[cursor]

⌛ Working on 16 tasks

• Research and understand Snowflake SQL API architecture, authentication methods, and request/response formats
• Set up Snowflake feature flags and dependencies in Cargo.toml files
• Create basic Snowflake module structure following SQLx patterns
• Implement Snowflake database struct and core Database trait
• Implement TypeInfo, Value, ValueRef for Snowflake data types
• Implement JWT-based authentication for Snowflake SQL API
• Implement Connection trait with HTTP client for REST API calls
• Implement Arguments trait for parameter binding in Snowflake
• Implement Executor trait for query execution via REST API
• Implement Row and Column traits for result set handling
• Implement Statement trait for prepared statements (if supported)
• Implement transaction management for Snowflake
• Implement comprehensive error handling and conversion
• Integrate Snowflake driver with Any driver for runtime selection
• Create integration tests and CI setup for Snowflake
• Create examples and comprehensive documentation

 

[lovasoa]

@cursoragent , for local testing and on ci, you can use https://github.com/tekumara/fakesnow

And the Any driver integration is mandatory.

[cursor]

⌛ Working on 3 tasks

• Complete mandatory Any driver integration for Snowflake
• Set up fakesnow for local testing and CI
• Add tests for Any driver with Snowflake support

 

[lovasoa]

@cursoragent make sure your code is tested on ci

and run ci checks locally too

cargo clippy --manifest-path sqlx-core/Cargo.toml
--no-default-features
--features offline,all-databases,all-types,migrate,runtime-tokio-rustls
-- -D warnings