code: public boolean isDefinitelyWritable(int column) throws SQLException {
  
          checkColumn(column);
  
          return resultMetaData.colIndexes != null
                 && resultMetaData.colIndexes[--column] > -1;
      }
docs: <!-- start generic documentation -->
  Indicates whether a write on the designated column will definitely succeed.
  <!-- end generic documentation -->
  
  <!-- start Release-specific documentation -->
  <div class="ReleaseSpecificDocumentation">
  <h3>HSQLDB-Specific Information:</h3> <p>
  
  From 1.9.0 this method returns false if the ResuleSet is not updatable
  or the column in question is not updatable.<p>
  
  </div>
  <!-- end release-specific documentation -->
  
  @param column the first column is 1, the second is 2, ...
  @return <code>true</code> if so; <code>false</code> otherwise
  @exception SQLException if a database access error occurs