docs: private boolean isColumnType(List<String> columnTypes, String columnName,
                                   List<String> tableNames, boolean debugPrint) {
          if (debugPrint) {
              System.out.println("  In NonVoltDBBackend.isColumnType:");
              System.out.println("    columnTypes: " + columnTypes);
              System.out.println("    columnName : " + columnName);
              System.out.println("    tableNames : " + tableNames);
          }
          if (tableNames == null || tableNames.size() == 0) {
              tableNames = Arrays.asList((String)null);
              if (debugPrint) {
                  System.out.println("    tableNames2: " + tableNames);
              }
          }
          for (String tn : tableNames) {
              // Lower-case table and column names are required for PostgreSQL;
              // we might need to alter this if we use another comparison
              // database (besides HSQL) someday
              String tableName = (tn == null) ? tn : tn.trim().toLowerCase();
              if (debugPrint) {
                  System.out.println("    tableName  : " + tableName);
              }
              try {
                  ResultSet rs = dbconn.getMetaData().getColumns(null, null,
                          tableName, columnName.trim().toLowerCase());
                  while (rs.next()) {
                      String columnType = getVoltColumnTypeName(rs.getString(6));
                      if (debugPrint) {
                          System.out.println("    tableName  : " + rs.getString(3));
                          System.out.println("    columnName : " + rs.getString(4));
                          System.out.println("    columnType : " + columnType);
                      }
                      if (columnTypes.contains(columnType)) {
                          if (debugPrint) {
                              System.out.println("    returning  : true");
                          }
                          return true;
                      }
                  }
              } catch (SQLException e) {
                  printCaughtException("In NonVoltDBBackend.isColumnType, with tableName "+tableName+", columnName "
                          + columnName+", columnTypes "+columnTypes+", caught SQLException:\n  " + e);
              }
          }
          if (debugPrint) {
              System.out.println("    returning  : false");
          }
          return false;
      }