datatrack-core 1.1.6

Version Control for Database Schemas

Datatrack - Version Control for Databases

Datatrack is a lightweight and open-source CLI tool that brings Git-like version control to your database schemas. Built for Data Engineers, Analytics Engineers, and Platform Teams, it automates: • Schema snapshots • Diffs across versions • Linting for naming and structure • Verification against custom rules • Exporting to JSON/YAML

Because in modern data systems, your schema is your contract—and when it breaks silently, everything else crumbles.

Features

• Snapshot schemas from any SQL-compatible DB
• Lint schema naming issues
• Enforce verification rules
• Compare schema snapshots (diff)
• Export to JSON/YAML for auditing or CI
• Full pipeline in one command

Performance & Cost Savings

Datatrack’s parallel and batched snapshot engine delivers significant performance improvements for real-world databases. Benchmarks were run in August 2025 on a MacBook Pro M2, Python 3.11, using SQLite and PostgreSQL.

Database Size	Tables	Serial Time	Parallel Time	Speedup	Time Saved (per 1k runs)	Time Saved (per 50k runs)
Small	12	0.18 s	0.09 s	2×	90 s	75 min
Medium	75	0.95 s	0.32 s	3×	630 s (10.5 min)	8.75 hrs
Large	250	2.80 s	0.80 s	3.5×	2,000 s (~33 min)	27 hrs

Key Takeaways

• Snapshot time reduced by 65–75% for medium and large databases.
• Scales linearly: higher workloads → greater savings.
• Faster developer feedback: reduced CI/CD wait times, fewer timeouts.
• Lower infrastructure costs: less CPU time means direct savings on cloud compute.

Real-World Impact

For a team running 50,000 large snapshots/month, Datatrack saves ~27 hours of CPU time. At typical cloud compute rates, this translates into hundreds of dollars per year in savings. The bigger win, however, is developer productivity and reliability: faster pipelines, earlier error detection, and less risk of schema-related outages.

Datatrack Architecture

+-------------------+
|      User/CLI     |
+-------------------+
          |
          v
+-------------------+
|   Typer CLI App   |  (datatrack/cli.py)
+-------------------+
          |
          v
+-------------------+
|   Command Router  |  (CLI commands: snapshot, diff, lint, verify, export, pipeline)
+-------------------+
          |
          v
+-------------------+
|   Tracker Logic   |  (datatrack/tracker.py)
|-------------------|
| - Introspection   |
| - Caching         |
| - Parallel Fetch  |
| - Batched Fetch   |
+-------------------+
          |
          v
+-------------------+
|   SQLAlchemy ORM  |  (DB connection, inspection)
+-------------------+
          |
          v
+-------------------+
|   Database Layer  |  (PostgreSQL, SQLite, MySQL, etc.)
+-------------------+
          |
          v
+-------------------+
|   Export/History  |  (JSON/YAML, snapshot history)
+-------------------+
          |
          v
+-------------------+
|   CI/CD & Audits  |  (Integration, reporting)
+-------------------+

Pipeline Execution Flow (Mermaid Diagram)

flowchart TD A[User/CLI] --> B[Typer CLI App] B --> C[Pipeline Command (pipeline run)] C --> D1[Snapshot: Save latest schema] D1 --> D2[Linting: Check naming, types, ambiguity] D2 --> D3[Verify: Apply schema rules (snake_case, reserved words)] D3 --> D4[Diff: Compare with previous snapshot] D4 --> D5[Export: Save snapshot & diff as JSON] D5 --> E[Tracker Logic (parallel/cached introspection)] E --> F[SQLAlchemy DB Connection] F --> G[Database (PostgreSQL, MySQL, SQLite, etc.)] G --> H[Export/History/Reporting]

Installation

Option 1: Install from PyPI (production use)

pip install datatrack-core

This is the easiest and recommended way to use datatracker as a CLI tool in your workflows.

Option 2: Install from GitHub (for development)

git clone https://github.com/nrnavaneet/datatrack.git
cd datatrack
pip install -r requirements.txt
pip install -e .

This method is ideal if you want to contribute or modify the tool.

Helpful Commands

Datatrack comes with built-in help and guidance for every command. Use this to quickly learn syntax and options:

datatrack --help
or
datatrack -h

How to Use

1. Initialize Tracking

datatrack init

Creates .datatrack/, .databases/, and optional initial files.

2. Connect to a Database

Save your DB connection for future use:

MySQL

datatrack connect mysql+pymysql://root:<password>@localhost:3306/<database-name>

PostgreSQL

datatrack connect postgresql+psycopg2://postgres:<password>@localhost:5432/<database-name>

SQLite

datatrack connect sqlite:///.databases/<database-name>

3. Take a Schema Snapshot

datatrack snapshot

Saves the current schema to .databases/exports/<db_name>/snapshots/.

4. Lint the Schema

datatrack lint

Detects issues in naming and structure.

5. Verify Schema Rules

datatrack verify

Validates schema against schema_rules.yaml.

6. View Schema Differences

datatrack diff

Shows table and column changes between the latest two snapshots.

7. Export Snapshots or Diffs

Export latest snapshot as YAML (default)

datatrack export

Explicitly export snapshot as YAML

datatrack export --type snapshot --format yaml

Export latest diff as JSON

datatrack export --type diff --format json

Output is saved in .databases/exports/<db_name>/.

8. View Snapshot History

datatrack history

Displays all snapshot timestamps and table counts.

9. Run the Full Pipeline

datatrack pipeline run

Runs lint, snapshot, verify, diff, and export together.

For advanced use cases and integration into CI/CD, visit:

https://github.com/nrnavaneet/datatrack