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<?php
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/*
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* $Id: DBPostgres.php 1262 2009-10-26 20:54:39Z francois $
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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 please see
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* <http://propel.phpdb.org>.
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*/
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/**
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* This is used to connect to PostgresQL databases.
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*
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* <a href="http://www.pgsql.org">http://www.pgsql.org</a>
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*
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* @author Hans Lellelid <hans@xmpl.org> (Propel)
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* @author Hakan Tandogan <hakan42@gmx.de> (Torque)
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* @version $Revision: 1262 $
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* @package propel.adapter
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*/
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class DBPostgres extends DBAdapter {
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/**
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* This method is used to ignore case.
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*
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* @param string $in The string to transform to upper case.
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* @return string The upper case string.
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*/
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public function toUpperCase($in)
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{
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return "UPPER(" . $in . ")";
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}
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/**
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* This method is used to ignore case.
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*
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* @param in The string whose case to ignore.
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* @return The string in a case that can be ignored.
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*/
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public function ignoreCase($in)
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{
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return "UPPER(" . $in . ")";
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}
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/**
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* Returns SQL which concatenates the second string to the first.
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*
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* @param string String to concatenate.
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* @param string String to append.
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* @return string
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*/
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public function concatString($s1, $s2)
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{
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return "($s1 || $s2)";
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}
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/**
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* Returns SQL which extracts a substring.
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*
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* @param string String to extract from.
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* @param int Offset to start from.
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* @param int Number of characters to extract.
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* @return string
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*/
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public function subString($s, $pos, $len)
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{
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return "substring($s from $pos" . ($len > -1 ? "for $len" : "") . ")";
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}
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/**
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* Returns SQL which calculates the length (in chars) of a string.
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*
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* @param string String to calculate length of.
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* @return string
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*/
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public function strLength($s)
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{
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return "char_length($s)";
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}
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/**
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* @see DBAdapter::getIdMethod()
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*/
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protected function getIdMethod()
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{
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return DBAdapter::ID_METHOD_SEQUENCE;
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}
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/**
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* Gets ID for specified sequence name.
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*/
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public function getId(PDO $con, $name = null)
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{
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if ($name === null) {
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throw new PropelException("Unable to fetch next sequence ID without sequence name.");
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}
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$stmt = $con->query("SELECT nextval(".$con->quote($name).")");
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$row = $stmt->fetch(PDO::FETCH_NUM);
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return $row[0];
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}
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/**
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* Returns timestamp formatter string for use in date() function.
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* @return string
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*/
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public function getTimestampFormatter()
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{
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return "Y-m-d H:i:s O";
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}
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/**
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* Returns timestamp formatter string for use in date() function.
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* @return string
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*/
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public function getTimeFormatter()
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{
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return "H:i:s O";
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}
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/**
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* @see DBAdapter::applyLimit()
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*/
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public function applyLimit(&$sql, $offset, $limit)
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{
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if ( $limit > 0 ) {
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$sql .= " LIMIT ".$limit;
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}
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if ( $offset > 0 ) {
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$sql .= " OFFSET ".$offset;
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}
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}
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/**
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* @see DBAdapter::random()
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*/
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public function random($seed=NULL)
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{
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return 'random()';
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}
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}
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