101 lines
3.1 KiB
PHP
101 lines
3.1 KiB
PHP
<?php
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/**
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* DropBuilder.php
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*
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* Builds the CREATE statement
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*
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* PHP version 5
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*
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* LICENSE:
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* Copyright (c) 2010-2014 Justin Swanhart and André Rothe
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @author André Rothe <andre.rothe@phosco.info>
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* @copyright 2010-2014 Justin Swanhart and André Rothe
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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* @version SVN: $Id$
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*
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*/
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namespace PHPSQLParser\builders;
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use PHPSQLParser\exceptions\UnableToCreateSQLException;
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use PHPSQLParser\utils\ExpressionType;
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/**
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* This class implements the builder for the [DROP] part. You can overwrite
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* all functions to achieve another handling.
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*/
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class DropBuilder implements Builder {
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protected function buildDropIndex( $parsed ) {
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$builder = new DropIndexBuilder();
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return $builder->build( $parsed );
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}
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protected function buildReserved( $parsed ) {
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$builder = new ReservedBuilder();
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return $builder->build( $parsed );
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}
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protected function buildExpression( $parsed ) {
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$builder = new DropExpressionBuilder();
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return $builder->build( $parsed );
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}
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protected function buildSubTree( $parsed ) {
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$sql = '';
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foreach ( $parsed['sub_tree'] as $k => $v ) {
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$len = strlen( $sql );
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$sql .= $this->buildReserved( $v );
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$sql .= $this->buildExpression( $v );
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if ( $len == strlen( $sql ) ) {
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throw new UnableToCreateSQLException( 'DROP subtree', $k, $v, 'expr_type' );
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}
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$sql .= ' ';
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}
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return $sql;
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}
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public function build( array $parsed ) {
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$drop = $parsed['DROP'];
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$sql = $this->buildSubTree( $drop );
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if ( $drop['expr_type'] === ExpressionType::INDEX ) {
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$sql .= '' . $this->buildDropIndex( $parsed['INDEX'] ) . ' ';
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}
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return 'DROP ' . substr( $sql, 0, -1 );
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}
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}
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?>
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