fix(postgres): Add CASCADE to AGE extension creation for automatic dependency resolution

[danielaskdd]

fix(postgres): Add CASCADE to AGE extension creation for automatic dependency resolution

Description

Problem

When initializing PostgreSQL graph storage, the AGE (Apache Graph Extension) creation could fail if any dependent extensions were not pre-installed on the PostgreSQL server. This resulted in the error:

asyncpg.exceptions.UndefinedFunctionError: function create_graph(unknown) does not exist

Solution

Added CASCADE keyword to the CREATE EXTENSION statement for Apache AGE. This ensures that any required dependent extensions are automatically installed when AGE is created.

Changes

• Modified configure_age_extension() in lightrag/kg/postgres_impl.py
• Changed from: CREATE EXTENSION IF NOT EXISTS age
• Changed to: CREATE EXTENSION IF NOT EXISTS AGE CASCADE

Impact

• Improves compatibility across different PostgreSQL deployments
• Reduces manual configuration requirements for users
• No breaking changes to existing functionality

Testing

• Verified that AGE extension is created successfully with CASCADE option
• Confirmed backward compatibility with existing PostgreSQL deployments

[danielaskdd]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Can't wait for the next one!

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".