108 lines
3.5 KiB
PHP
108 lines
3.5 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* DropProcessor.php
|
||
|
|
*
|
||
|
|
* This file implements the processor for the DROP statements.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010-2012, Justin Swanhart
|
||
|
|
* with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
|
||
|
|
*
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
||
|
|
* are permitted provided that the following conditions are met:
|
||
|
|
*
|
||
|
|
* * Redistributions of source code must retain the above copyright notice,
|
||
|
|
* this list of conditions and the following disclaimer.
|
||
|
|
* * Redistributions in binary form must reproduce the above copyright notice,
|
||
|
|
* this list of conditions and the following disclaimer in the documentation
|
||
|
|
* and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
||
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
||
|
|
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
||
|
|
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
||
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
||
|
|
* DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
require_once(dirname(__FILE__) . '/../utils/ExpressionToken.php');
|
||
|
|
require_once(dirname(__FILE__) . '/../utils/ExpressionType.php');
|
||
|
|
require_once(dirname(__FILE__) . '/AbstractProcessor.php');
|
||
|
|
|
||
|
|
/**
|
||
|
|
*
|
||
|
|
* This class processes the DROP statements.
|
||
|
|
*
|
||
|
|
* @author arothe
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
class DropProcessor extends AbstractProcessor {
|
||
|
|
|
||
|
|
// TODO: we should enhance it to get the positions for the IF EXISTS keywords
|
||
|
|
// look into the CreateProcessor to get an idea.
|
||
|
|
public function process($tokenList) {
|
||
|
|
$skip = 0;
|
||
|
|
$warning = true;
|
||
|
|
$base_expr = "";
|
||
|
|
$expr_type = false;
|
||
|
|
$option = false;
|
||
|
|
$resultList = array();
|
||
|
|
|
||
|
|
foreach ($tokenList as $k => $v) {
|
||
|
|
$token = new ExpressionToken($k, $v);
|
||
|
|
|
||
|
|
if ($token->isWhitespaceToken()) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($skip > 0) {
|
||
|
|
$skip --;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch ($token->getUpper()) {
|
||
|
|
case 'VIEW':
|
||
|
|
case 'SCHEMA':
|
||
|
|
case 'DATABASE':
|
||
|
|
case 'TABLE':
|
||
|
|
$expr_type = strtolower($token->getTrim());
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'IF':
|
||
|
|
$warning = false;
|
||
|
|
$skip = 1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'TEMPORARY':
|
||
|
|
$expr_type = ExpressionType::TEMPORARY_TABLE;
|
||
|
|
$skip = 1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 'RESTRICT':
|
||
|
|
case 'CASCADE':
|
||
|
|
$option = $token->getUpper();
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ',':
|
||
|
|
$resultList[] = array('expr_type' => $expr_type, 'base_expr' => $base_expr);
|
||
|
|
$base_expr = "";
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
$base_expr .= $token->getToken();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($base_expr !== "") {
|
||
|
|
$resultList[] = array('expr_type' => $expr_type, 'base_expr' => $base_expr);
|
||
|
|
}
|
||
|
|
|
||
|
|
return array('option' => $option, 'warning' => $warning, 'object_list' => $resultList);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
?>
|