\begin{longtable}{rllllll}
\hline
   rowid & type   & start      & end        & party      & how      & executive\_id   \\
\hline
\endhead
      31 & prez   & 1845-03-04 & 1849-03-04 & Democratic & election & James Polk     \\
\hline
\end{longtable}