docs: void processAlterTableDropColumn(Table table, String colName,
                                       boolean cascade) {
  
          int colindex = table.getColumnIndex(colName);
  
          if (table.getColumnCount() == 1) {
              throw Error.error(ErrorCode.X_42591);
          }
  
          session.commit(false);
  
          TableWorks tableWorks = new TableWorks(session, table);
  
          tableWorks.dropColumn(colindex, cascade);
  
          //VoltDB extension to support Time to live
          if (table.getTTL() != null && colName.equalsIgnoreCase(table.getTTL().ttlColumn.getName().name)) {
              table.dropTTL();
          }
      }