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File: UpdateStatement.php
<?php

/**
 * `UPDATE` statement.
 */

namespace PhpMyAdmin\SqlParser\Statements;

use PhpMyAdmin\SqlParser\Components\Condition;
use PhpMyAdmin\SqlParser\Components\Expression;
use PhpMyAdmin\SqlParser\Components\Limit;
use PhpMyAdmin\SqlParser\Components\OrderKeyword;
use PhpMyAdmin\SqlParser\Components\SetOperation;
use PhpMyAdmin\SqlParser\Statement;

/**
 * `UPDATE` statement.
 *
 * UPDATE [LOW_PRIORITY] [IGNORE] table_reference
 *     SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
 *     [WHERE where_condition]
 *     [ORDER BY ...]
 *     [LIMIT row_count]
 *
 * or
 *
 * UPDATE [LOW_PRIORITY] [IGNORE] table_references
 *     SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
 *     [WHERE where_condition]
 *
 * @category   Statements
 *
 * @license    https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
 */
class UpdateStatement extends Statement
{
    /**
     * Options for `UPDATE` statements and their slot ID.
     *
     * @var array
     */
    public static $OPTIONS = array(
        'LOW_PRIORITY' => 1,
        'IGNORE' => 2,
    );

    /**
     * The clauses of this statement, in order.
     *
     * @see Statement::$CLAUSES
     *
     * @var array
     */
    public static $CLAUSES = array(
        'UPDATE' => array('UPDATE', 2),
        // Used for options.
        '_OPTIONS' => array('_OPTIONS', 1),
        // Used for updated tables.
        '_UPDATE' => array('UPDATE', 1),
        'SET' => array('SET', 3),
        'WHERE' => array('WHERE', 3),
        'ORDER BY' => array('ORDER BY', 3),
        'LIMIT' => array('LIMIT', 3),
    );

    /**
     * Tables used as sources for this statement.
     *
     * @var Expression[]
     */
    public $tables;

    /**
     * The updated values.
     *
     * @var SetOperation[]
     */
    public $set;

    /**
     * Conditions used for filtering each row of the result set.
     *
     * @var Condition[]
     */
    public $where;

    /**
     * Specifies the order of the rows in the result set.
     *
     * @var OrderKeyword[]
     */
    public $order;

    /**
     * Conditions used for limiting the size of the result set.
     *
     * @var Limit
     */
    public $limit;
}