Support statement types added in DuckDB 1.5.5

[suketa]

Summary

duckdb.h v1.5.5 adds three duckdb_statement_type values — the only change in the header between v1.5.4 and v1.5.5:

• DUCKDB_STATEMENT_TYPE_COPY_DATABASE = 28
• DUCKDB_STATEMENT_TYPE_UPDATE_EXTENSIONS = 29
• DUCKDB_STATEMENT_TYPE_MERGE_INTO = 30

Without them, #statement_type raises DuckDB::Error: Unknown statement type: 30 for a MERGE INTO statement.

No new functions or signature changes in the header, so nothing else to bind.

Compatibility

Appending to STATEMENT_TYPES is safe on DuckDB 1.4.5 (LTS): those integers are never returned there, and statement_type_to_sym only guards the upper bound. The new test skips on DuckDB < 1.5.0.

Test plan

• bundle exec rake test against DuckDB 1.5.5: 1360 runs, 2621 assertions, 0 failures, 0 errors
• New test_statement_type_merge_into asserts :merge_into
• bundle exec rubocop clean

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added support for recognizing DuckDB 1.5.5 statement types: COPY DATABASE, UPDATE EXTENSIONS, and MERGE INTO.
  • These statements now return their corresponding statement type instead of raising an error.

• Tests

  • Added prepared-statement coverage for all three supported statement types, including version-specific validation.

• Documentation

  • Updated the unreleased changelog with the new statement-type support.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 1733937f-3689-4541-93e0-872de02e1701

📥 Commits

Reviewing files that changed from the base of the PR and between 517021b and 88a55dc.

📒 Files selected for processing (3)

• CHANGELOG.md
• lib/duckdb/converter/int_to_sym.rb
• test/duckdb_test/prepared_statement_test.rb

🚧 Files skipped from review as they are similar to previous changes (2)

• lib/duckdb/converter/int_to_sym.rb
• CHANGELOG.md

---

📝 Walkthrough

Walkthrough

The change adds support for three DuckDB 1.5.5 statement types. It updates statement-type conversion, adds version-gated prepared-statement tests, and documents the change.

Changes

Statement type support

Layer / File(s)	Summary
Statement conversion and validation lib/duckdb/converter/int_to_sym.rb, test/duckdb_test/prepared_statement_test.rb, CHANGELOG.md	The converter recognizes copy_database, update_extensions, and merge_into. Version-gated tests verify the corresponding statement types. The changelog records the support.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• suketa/ruby-duckdb#1435: Adds related DuckDB 1.5.5 support.

Suggested reviewers: otegami

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: support for statement types added in DuckDB 1.5.5.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/statement-types-duckdb-1.5.5

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@test/duckdb_test/prepared_statement_test.rb`:
- Around line 144-145: Update the version guard in
test_statement_type_merge_into to skip DuckDB library versions below 1.5.5,
replacing the current 1.5.0 minimum while preserving the existing test behavior
for supported versions.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ac49f9c2-f902-4eb3-b1c4-2c70f4ca0ab1

📥 Commits

Reviewing files that changed from the base of the PR and between 34970d7 and 1e3cfe7.

📒 Files selected for processing (3)

• CHANGELOG.md
• lib/duckdb/converter/int_to_sym.rb
• test/duckdb_test/prepared_statement_test.rb