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n8n-nodes-intersystems-iris

v0.1.0

Published

n8n community node to store AI agent chat memory in InterSystems IRIS over its Postgres wire protocol (iris-pgwire)

Downloads

217

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Links

Git

Maintainers

isc-bsavianoisc-bsavianogjsjohnmurraygjsjohnmurrayisc-rsinghisc-rsinghisc-kluisc-kluisc-tdyarisc-tdyar

Keywords

n8n-community-node-packagen8nintersystemsirismemorychat-memorypgwirelangchainai

Readme

n8n-nodes-intersystems-iris

An n8n community node that stores AI agent chat memory in InterSystems IRIS, using IRIS's PostgreSQL wire-protocol endpoint (iris-pgwire).

The table schema, message inserts, and reads all live in IRIS. The PostgreSQL client library is only used as the transport.

Nodes

  • IRIS Chat Memory — a Memory sub-node for the AI Agent. Persists the conversation history to an IRIS table, keyed by session, with a configurable context window.

Prerequisites

  • An InterSystems IRIS instance reachable over iris-pgwire.
  • n8n 1.x or later with community nodes enabled.

Installation

Follow the community node installation guide, or in n8n go to Settings → Community Nodes → Install and enter:

n8n-nodes-intersystems-iris

Credential: IRIS Pgwire API

| Field | Notes | | --- | --- | | Host | IRIS host running iris-pgwire | | Namespace | IRIS namespace (maps to the Postgres "database" concept), e.g. USER | | User | e.g. _SYSTEM | | Password | | | Port | iris-pgwire listener port (commonly 5432) | | SSL | disable / allow / require |

Usage

  1. Add an AI Agent node with a Chat Trigger.
  2. On the Agent's Memory input, add IRIS Chat Memory.
  3. Select (or create) an IRIS Pgwire API credential.
  4. Optionally set the Table Name (default n8n_chat_histories) and Context Window Length.

The table is created automatically on first use.

How it differs from the Postgres Chat Memory node

IRIS pgwire speaks the PostgreSQL protocol, but IRIS is a different database underneath. This node handles two protocol differences:

  • No JSON/JSONB column type. The stock LangChain Postgres history stores its message column as JSONB, which IRIS rejects. This node stores the serialized message in a wide VARCHAR and (de)serializes the JSON in JavaScript. LONGVARCHAR is avoided because over pgwire it reads back as a stream reference rather than inline text.
  • Zero-row DELETE. IRIS pgwire raises an error when a DELETE matches no rows; clearing an empty session is treated as a valid no-op.

Development

npm install
npm run build      # n8n-node build
npm run lint       # n8n-node lint
npm test           # vitest

License

MIT