pg-extract-schema by Hannah Vernon

Overview

This project is designed to extract schema information from PostgreSQL databases in an efficient and comprehensive manner.

Features

• Extracts DDL for the following object types, each into discrete .sql files:
  • Extensions
  • Schemas
  • Sequences (with full attributes)
  • Types (enums, composites, and domains)
  • Tables (with columns, defaults, primary keys, unique constraints, check constraints, and comments)
  • Indexes (non-PK, non-unique-constraint)
  • Foreign keys
  • Views
  • Materialized views
  • Functions and procedures
  • Triggers

Requirements

• PostgreSQL 9.6 or later.
• DotNet 9.0 Runtime or later.

Installation

1. Clone the repository:

   git clone https://github.com/HannahVernon/pg-extract-schema.git
   cd pg-extract-schema

2. Install dependencies

   winget install Microsoft.DotNet.SDK.9

3. Build the binaries.

   dotnet build

Usage

Run the executable with appropriate parameters:

Description:
  Extract DDL from a PostgreSQL database into discrete .sql files

Usage:
  pg-extract-schema [options]

Options:
  -h, --host <host> (REQUIRED)          PostgreSQL server hostname
  -p, --port <port>                     PostgreSQL server port [default: 5432]
  -d, --database <database> (REQUIRED)  Database name
  -s, --schema <schema>                 Schema name (default: all non-system schemas)
  -o, --output <output>                 Output directory [default: output]
  -U, --username <username>             PostgreSQL username [default: postgres]
  -W, --password <password>             PostgreSQL password (or set PGPASSWORD env var).  If password is not supplied on the command-line or via the environment variable, pg-extract-schema will ask for the password.
  --include-postgres-system-objects     Include PostgreSQL system schemas (pg_catalog, pg_toast, information_schema, pg_temp) and the plpgsql extension [default: False]
  --include-pg-toast                    Include pg_toast schema objects (excluded by default) [default: False]
  --version                             Show version information
  -?, -h, --help                        Show help and usage information

Examples

pg-extract-schema.exe -h mypgserver -p 5432 -d mydatabase -U me -o c:\temp\pg_schema

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

1. Fork the repository.
2. Create a new branch (git checkout -b feature-foo).
3. Make your changes and commit them (git commit -m 'Add some feature').
4. Push to the branch (git push origin feature-foo).
5. Open a pull request.

Support

For support, please open an issue in the GitHub repository. We will try to respond as quickly as possible.

Changelog

[1.0.0] - 2026-03-19

• Initial release