142 lines
2.9 KiB
PHP
142 lines
2.9 KiB
PHP
<?php
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/**
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* This file is part of the Propel package.
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @license MIT License
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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: 1612 $
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* @package propel.runtime.adapter
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*/
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class DBPostgres extends DBAdapter
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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 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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