Virtual Servers
Perspective’s Virtual Server feature lets you connect <perspective-viewer> to
external data sources without loading data into Perspective’s built-in engine.
Instead, queries are translated and executed natively by the external database.
For a detailed explanation of how virtual servers work, see the Virtual Servers concepts page.
Perspective ships with built-in virtual server implementations for:
- DuckDB — query DuckDB databases in-browser
via
@duckdb/duckdb-wasm, or on the server via Node.js. - ClickHouse — query a ClickHouse server directly from the browser or from Node.js.
You can also implement your own virtual server
to connect Perspective to any data source by implementing the
VirtualServerHandler interface.