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SchemaCrawler is an open-source Java API that makes working with database metadata as easy as working with plain old Java objects. SchemaCrawler is also a database schema discovery and comprehension, and schema documentation tool. You can search for database schema objects using regular expressions, and output the schema and data in a readable text format. The output is designed to be diff-ed against other database schemas.

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/*
 *
 * SchemaCrawler
 * http://www.schemacrawler.com
 * Copyright (c) 2000-2015, Sualeh Fatehi.
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

package schemacrawler.schema;


import java.util.List;
import java.util.Optional;

/**
 * Represents a result set, a result of a query.
 *
 * @author Sualeh Fatehi
 */
public interface ResultsColumns
  extends NamedObject, Iterable
{

  /**
   * Gets the list of columns in ordinal order.
   *
   * @return Columns of the table.
   */
  List getColumns();

  /**
   * Gets a comma-separated list of columns.
   *
   * @return Comma-separated list of columns
   */
  String getColumnsListAsString();

  /**
   * Gets a column by name.
   *
   * @param name
   *        Name
   * @return Column.
   */
  Optional lookupColumn(String name);

}