Function is_session_param_fallback

nodedb/tests/pgwire_show_dispatch.rs:27–41

Returns true if the response is the pgwire session-parameter fallback: exactly one row, exactly one column, column name equal to `param` (case-insensitive), and an empty value.

(server: &TestServer, sql: &str, param: &str)

/// exactly one row, exactly one column, column name equal to `param`
/// (case-insensitive), and an empty value.
async fn is_session_param_fallback(server: &TestServer, sql: &str, param: &str) -> bool {
    let rows = match server.query_named_rows(sql).await {
        Ok(r) => r,
        Err(_) => return false,
    };
    if rows.len() != 1 {
        return false;
    }
    let row = &rows[0];
    if row.len() != 1 {
        return false;
    }
    row.iter()
        .any(|(k, v)| k.eq_ignore_ascii_case(param) && v.is_empty())
}

// ── SHOW DATABASES ───────────────────────────────────────────────────