https://github.com/tatut/pgprolog

PostgreSQL Prolog language handler
https://github.com/tatut/pgprolog

Last synced: about 1 month ago
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PostgreSQL Prolog language handler

• Host: GitHub
• URL: https://github.com/tatut/pgprolog
• Owner: tatut
• License: bsd-3-clause
• Created: 2024-03-30T09:13:13.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-04-02T05:12:30.000Z (6 months ago)
• Last Synced: 2024-04-09T16:20:19.851Z (5 months ago)
• Language: Rust
• Size: 6.84 KB
• Stars: 123
• Watchers: 5
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Prolog language for PostgreSQL

This is a PostgreSQL extension that allows writing stored procedures in Prolog.

This embeds [Scryer Prolog](https://www.scryer.pl) into a PostgreSQL extension.

**Proof of concept!** Not ready for any actual use.

## Running

You'll need [pgrx](https://github.com/pgcentralfoundation/pgrx) installed on your system. To install **pgrx** you can use cargo:

```

cargo install --locked cargo-pgrx

cargo pgrx init

```

After that, run with `cargo pgrx run`.

Then you can create the extension and language:

```

CREATE EXTENSION pgprolog;

CREATE LANGUAGE plprolog HANDLER plprolog_call_handler;

CREATE FUNCTION myfunc(a TEXT) RETURNS TEXT AS 'parent(alice,bob). handle(In,Out) :- parent(In,Out).' LANGUAGE plprolog;

SELECT myfunc('alice');

```