feat(db)!: add bulk_insert

[m4tx]

No description provided.

[Copilot]

Pull Request Overview

This PR implements bulk insert functionality for the database layer, providing significant performance improvements for inserting multiple model instances. The implementation includes support for all database backends (PostgreSQL, MySQL, SQLite) with appropriate optimizations for each.

• Added bulk_create method to the Model trait and corresponding bulk_insert/bulk_insert_or_update methods to the database backend
• Implemented smart batching based on database parameter limits (32,766 for SQLite, 65,535 for PostgreSQL/MySQL)
• Comprehensive test coverage including edge cases (empty input, large batches, models with only auto fields, fixed primary keys)

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 8 comments.

File	Description
cot/src/db.rs	Implements bulk insert functionality with database-specific optimizations, adds new error types for bulk operations, and provides both insert and upsert variants
cot/tests/db.rs	Adds 5 comprehensive test cases covering basic functionality, empty input handling, large batch processing, edge cases with auto-only fields, and fixed primary key scenarios

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[github-actions]

Bencher Report

Branch	bulk-create
Testbed	github-ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	Benchmark Result microseconds (µs) (Result Δ%)	Upper Boundary microseconds (µs) (Limit %)
empty_router/empty_router	📈 view plot 🚷 view threshold	6,117.00 µs (+0.69%) Baseline: 6,075.03 µs	6,676.54 µs (91.62%)
json_api/json_api	📈 view plot 🚷 view threshold	1,032.80 µs (+0.58%) Baseline: 1,026.88 µs	1,113.56 µs (92.75%)
nested_routers/nested_routers	📈 view plot 🚷 view threshold	952.16 µs (+0.13%) Baseline: 950.91 µs	1,032.73 µs (92.20%)
single_root_route/single_root_route	📈 view plot 🚷 view threshold	913.18 µs (+0.31%) Baseline: 910.35 µs	980.49 µs (93.14%)
single_root_route_burst/single_root_route_burst	📈 view plot 🚷 view threshold	17,884.00 µs (+0.42%) Baseline: 17,808.50 µs	21,177.16 µs (84.45%)

🐰 View full continuous benchmarking report in Bencher

[codecov]

Codecov Report

❌ Patch coverage is 79.75460% with 33 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cot/src/db.rs	79.75%	22 Missing and 11 partials ⚠️

Flag	Coverage Δ
rust	90.58% <79.75%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
cot/src/db.rs	85.35% <79.75%> (-1.76%)	⬇️

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[seqre]

Good start, please apply Copilot review as it's actually not bad

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 11 comments.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 7 comments.

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[seqre]

LGTM

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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