JdbcExportJob.java 文件源码

private void configureGenericRecordExportInputFormat(Job job, String tableName)
    throws IOException {
  ConnManager connManager = context.getConnManager();
  Map<String, Integer> columnTypeInts;
  if (options.getCall() == null) {
    columnTypeInts = connManager.getColumnTypes(
        tableName,
        options.getSqlQuery());
  } else {
    columnTypeInts = connManager.getColumnTypesForProcedure(
        options.getCall());
  }
  String[] specifiedColumns = options.getColumns();
  MapWritable columnTypes = new MapWritable();
  for (Map.Entry<String, Integer> e : columnTypeInts.entrySet()) {
    String column = e.getKey();
    column = (specifiedColumns == null) ? column : options.getColumnNameCaseInsensitive(column);
    if (column != null) {
      Text columnName = new Text(column);
      Text columnType = new Text(connManager.toJavaType(tableName, column, e.getValue()));
      columnTypes.put(columnName, columnType);
    }
  }
  DefaultStringifier.store(job.getConfiguration(), columnTypes,
      AvroExportMapper.AVRO_COLUMN_TYPES_MAP);
}