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fix(sqlite): autocommit mode transaction handling to match CPython by ever0de · Pull Request #5918 · RustPython/RustPython

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Walkthrough

The changes update transaction handling in the SQLite module. When the isolation level is set to None, any pending transaction is now committed if not already in auto-commit mode. Additionally, transactions are only started during DML execution if an explicit isolation level is set, refining transaction control logic.

Changes

File(s) Change Summary
stdlib/src/sqlite.rs Updated Connection::set_isolation_level to commit pending transactions when switching to auto-commit mode; modified Cursor::execute and executemany to only start transactions if an isolation level is set.

Poem

In the warren of code where the data flows free,
A bunny commits when set to "None" with glee.
Transactions now start only when told,
Isolation set—no stories untold.
With careful new rules, the queries all run,
Hopping through logic ‘til the work is done! 🐇

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📥 Commits

Reviewing files that changed from the base of the PR and between c195473 and 142b263.

⛔ Files ignored due to path filters (1)
  • Lib/test/test_sqlite3/test_transactions.py is excluded by !Lib/**
📒 Files selected for processing (1)
  • stdlib/src/sqlite.rs (3 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
`**/*.rs`: Follow the default rustfmt code style (`cargo fmt` to format) Always ...

**/*.rs: Follow the default rustfmt code style (cargo fmt to format)
Always run clippy to lint code (cargo clippy) before completing tasks. Fix any warnings or lints that are introduced by your changes
Follow Rust best practices for error handling and memory management
Use the macro system (pyclass, pymodule, pyfunction, etc.) when implementing Python functionality in Rust

📄 Source: CodeRabbit Inference Engine (.github/copilot-instructions.md)

List of files the instruction was applied to:

  • stdlib/src/sqlite.rs
🔇 Additional comments (1)
stdlib/src/sqlite.rs (1)

1349-1358: Good implementation of autocommit mode transition!

The logic correctly commits any pending transaction when switching to autocommit mode (isolation_level = None), which aligns with CPython's behavior. Holding the lock throughout the check and commit operation properly prevents race conditions.

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