50 lines
2.0 KiB
PHP
50 lines
2.0 KiB
PHP
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<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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Doctrine::autoload('Doctrine_Expression');
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/**
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* Doctrine_Expression_Sqlite
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*
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* @package Doctrine ORM
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* @url www.phpdoctrine.com
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* @license LGPL
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*/
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class Doctrine_Expression_Sqlite extends Doctrine_Expression {
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/**
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* Returns part of a string.
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*
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* Note: Not SQL92, but common functionality. SQLite only supports the 3
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* parameter variant of this function, so we are using 2^30-1 as
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* artificial length in that case.
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*
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* @param string $value the target $value the string or the string column.
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* @param int $from extract from this characeter.
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* @param int $len extract this amount of characters.
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* @return string sql that extracts part of a string.
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*/
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public function subString($value, $from, $len = null) {
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$value = $this->getIdentifier( $value );
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if ( $len === null )
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$len = 1073741823;
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return 'SUBSTR(' . $value . ', ' . $from . ', ' . $len . ')';
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}
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}
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