Method findBadColumns

java/tools/src/java/org/apache/orc/tools/ScanData.java:125–151

(Reader reader, LocationInfo current, int batchSize,
      TypeDescription column, boolean[] include)

  }

  static boolean findBadColumns(Reader reader, LocationInfo current, int batchSize,
      TypeDescription column, boolean[] include) {
    include[column.getId()] = true;
    TypeDescription schema = reader.getSchema();
    boolean result = false;
    if (column.getChildren() == null) {
      int row = 0;
      try (RecordReader rows = reader.rows(reader.options().include(include))) {
        rows.seekToRow(current.row);
        VectorizedRowBatch batch = schema.createRowBatch(
            TypeDescription.RowBatchVersion.USE_DECIMAL64, 1);
        for(row=0; row < batchSize; ++row) {
          rows.nextBatch(batch);
        }
      } catch (Throwable t) {
        System.out.printf("Column %d failed at row %d%n", column.getId(),
            current.row + row);
        result = true;
      }
    } else {
      for(TypeDescription child: column.getChildren()) {
        result |= findBadColumns(reader, current, batchSize, child, include);
      }
    }
    include[column.getId()] = false;
    return result;
  }

  static void main(Configuration conf, String[] args) throws ParseException {
    CommandLine cli = parseCommandLine(args);