n8n-nodes-postgresql-copy

Custom n8n community node (developer: Firman Hanafi) to run PostgreSQL COPY TO / COPY FROM with streaming (CSV/TSV/custom delimiter) for bulk export/import.

Features

• COPY TO: export SELECT results to CSV/TSV/custom delimiter; header, quote/null, encoding options.
• COPY FROM: import CSV/TSV/custom delimiter from a binary property; header, column mapping, dry-run, skip errors.
• Streaming: avoids loading the whole file into memory.
• Uses n8n’s built-in Postgres credentials.

Installation

• n8n UI: Settings → Community Nodes → install n8n-nodes-postgresql-copy.
• CLI (in your n8n directory): npm install n8n-nodes-postgresql-copy

Node Configuration

• Credentials: select Postgres (host, port, database, user, password, ssl).
• Operation:
  • Copy To (Export): set Query, Output Format (csv/tsv/custom), File Name, Binary Property Name, header/quote/null/encoding options.
  • Copy From (Import): set Table Name, Input Binary Field, Input Format (csv/tsv/custom), Has Header, Column Mapping, quote/null/skipErrors/dryRun options.

Output

• Copy To: JSON {rowCount, fileSize, executionTimeMs, fileName, format} + binary file (with mimeType, fileName, fileExtension).
• Copy From: JSON {success, table, rowsImported, rowsSkipped, errors, executionTimeMs, dryRun}.

Notes

• For custom delimiter, fill Custom Delimiter.
• Dry Run rolls back the transaction (no data written).
• Ensure resources are sufficient for large files; COPY uses streaming but still needs memory headroom.

Development

npm install
npm run build
npm test   # requires devDependencies

License

MIT