code: public boolean getInternalBoolean(ColumnInformation columnInfo) {
      if (lastValueWasNull()) {
        return false;
      }
  
      if (columnInfo.getColumnType() == ColumnType.BIT) {
        return parseBit() != 0;
      }
      final String rawVal = new String(buf, pos, length, StandardCharsets.UTF_8);
      return !("false".equals(rawVal) || "0".equals(rawVal));
    }
docs: Get boolean from raw text format.
  
  @param columnInfo column information
  @return boolean value