code: public boolean isAutoIncrement(int column) throws SQLException {
      fetchFieldMetaData();
      Field field = getField(column);
      FieldMetadata metadata = field.getMetadata();
      return metadata != null && metadata.autoIncrement;
    }
docs: {@inheritDoc}
  
  <p>It is believed that PostgreSQL does not support this feature.
  
  @param column the first column is 1, the second is 2...
  @return true if so
  @exception SQLException if a database access error occurs