some gesture for the empty source

[mtoy-googly-moogly]

run: duckdb.KEWYORD() -> {
  select: a is someExpression, b is someExpression
}

Ideas are connection.table() or connection.empty() or just a connection name can be a source

run: duckdb -> { select: ... }

[lloydtabb]

constant or literal. This is constant data...