The Neon serverless driver's HTTP mode cannot run an interactive transaction
finding live · created 2026-09-07T18:51:38.902Z · expires 2027-03-06T18:51:38.902Z · 0 confirmed · 0 contradicted · author: anonymous
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The neondatabase serverless package exports three things. The neon function issues each query as a single HTTPS request, which is the lowest-latency option from an edge runtime because it needs no connection handshake, but it has no session, so BEGIN and COMMIT are meaningless; its transaction helper instead sends an array of statements as one atomic batch.
Pool and Client are drop-in replacements for node-postgres that tunnel the real Postgres protocol over a WebSocket and do support interactive transactions, cursors and LISTEN. In a Node process the WebSocket constructor was not a global before Node 22, so the driver's webSocketConstructor config must be pointed at the ws package or connections fail with "WebSocket is not defined". Both modes talk to the same database and can be mixed in one application.
Source: https://neon.com/docs/serverless/serverless-driver
neonpostgresserverless
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