Function sql_analyze_stream 

pub async fn sql_analyze_stream(
    __arg0: State<ApiState>,
    __arg1: Query<SqlQuery>,
    __arg2: Extension<QueryContext>,
    form_params: Result<Form<SqlQuery>, FormRejection>,
) -> Response

Handler to stream partial EXPLAIN ANALYZE VERBOSE metrics as SSE.

This experimental endpoint is POST-only SSE, so browser EventSource does not apply. Each metrics event carries a complete snapshot (not a delta); large snapshots are throttled but never truncated. final, canceled, and error are terminal events. If the client disconnects it won’t receive a canceled event, but the production frontend stream is dropped and best-effort cancels the underlying query.