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<?php
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/*
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* $Id: Pgsql.php 7490 2010-03-29 19:53:27Z jwage $
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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.doctrine-project.org>.
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*/
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/**
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* Doctrine_Connection_Pgsql
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*
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* @package Doctrine
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* @subpackage Connection
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
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* @version $Revision: 7490 $
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* @link www.doctrine-project.org
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* @since 1.0
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*/
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class Doctrine_Connection_Pgsql extends Doctrine_Connection_Common
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{
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/**
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* @var string $driverName the name of this connection driver
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*/
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protected $driverName = 'Pgsql';
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/**
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* the constructor
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*
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* @param Doctrine_Manager $manager
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* @param PDO $pdo database handle
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*/
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public function __construct(Doctrine_Manager $manager, $adapter)
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{
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// initialize all driver options
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$this->supported = array(
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'sequences' => true,
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'indexes' => true,
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'affected_rows' => true,
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'summary_functions' => true,
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'order_by_text' => true,
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'transactions' => true,
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'savepoints' => true,
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'current_id' => true,
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'limit_queries' => true,
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'LOBs' => true,
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'replace' => 'emulated',
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'sub_selects' => true,
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'auto_increment' => 'emulated',
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'primary_key' => true,
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'result_introspection' => true,
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'prepared_statements' => true,
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'identifier_quoting' => true,
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'pattern_escaping' => true,
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);
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$this->properties['string_quoting'] = array('start' => "'",
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'end' => "'",
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'escape' => "'",
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'escape_pattern' => '\\');
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$this->properties['identifier_quoting'] = array('start' => '"',
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'end' => '"',
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'escape' => '"');
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parent::__construct($manager, $adapter);
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}
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/**
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* Set the charset on the current connection
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*
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* @param string charset
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*
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* @return void
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*/
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public function setCharset($charset)
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{
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$query = 'SET NAMES '.$this->quote($charset);
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$this->exec($query);
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parent::setCharset($charset);
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}
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/**
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* convertBoolean
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* some drivers need the boolean values to be converted into integers
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* when using DQL API
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*
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* This method takes care of that conversion
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*
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* @param array $item
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* @return void
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*/
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public function convertBooleans($item)
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{
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if (is_array($item)) {
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foreach ($item as $key => $value) {
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if (is_bool($value)) {
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$item[$key] = ($value) ? 'true' : 'false';
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}
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}
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} else {
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if (is_bool($item) || is_numeric($item)) {
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$item = ($item) ? 'true' : 'false';
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}
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}
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return $item;
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}
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/**
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* Changes a query string for various DBMS specific reasons
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*
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* @param string $query query to modify
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* @param integer $limit limit the number of rows
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* @param integer $offset start reading from given offset
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* @param boolean $isManip if the query is a DML query
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* @return string modified query
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*/
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public function modifyLimitQuery($query, $limit = false, $offset = false, $isManip = false)
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{
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if ($limit > 0) {
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$query = rtrim($query);
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if (substr($query, -1) == ';') {
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$query = substr($query, 0, -1);
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}
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if ($isManip) {
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$manip = preg_replace('/^(DELETE FROM|UPDATE).*$/', '\\1', $query);
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$from = $match[2];
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$where = $match[3];
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$query = $manip . ' ' . $from . ' WHERE ctid=(SELECT ctid FROM '
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. $from . ' ' . $where . ' LIMIT ' . (int)$limit . ')';
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} else {
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if ( ! empty($limit)) {
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$query .= ' LIMIT ' . (int)$limit;
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}
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if ( ! empty($offset)) {
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$query .= ' OFFSET ' . (int)$offset;
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}
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}
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}
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return $query;
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}
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/**
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* return version information about the server
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*
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* @param string $native determines if the raw version string should be returned
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* @return array|string an array or string with version information
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*/
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public function getServerVersion($native = false)
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{
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$query = 'SHOW SERVER_VERSION';
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$serverInfo = $this->fetchOne($query);
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if ( ! $native) {
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$tmp = explode('.', $serverInfo, 3);
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if (empty($tmp[2]) && isset($tmp[1])
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&& preg_match('/(\d+)(.*)/', $tmp[1], $tmp2)
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) {
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$serverInfo = array(
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'major' => $tmp[0],
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'minor' => $tmp2[1],
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'patch' => null,
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'extra' => $tmp2[2],
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'native' => $serverInfo,
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);
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} else {
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$serverInfo = array(
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'major' => isset($tmp[0]) ? $tmp[0] : null,
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'minor' => isset($tmp[1]) ? $tmp[1] : null,
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'patch' => isset($tmp[2]) ? $tmp[2] : null,
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'extra' => null,
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'native' => $serverInfo,
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);
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}
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}
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return $serverInfo;
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}
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/**
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* Inserts a table row with specified data.
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*
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* @param Doctrine_Table $table The table to insert data into.
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* @param array $values An associative array containing column-value pairs.
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* Values can be strings or Doctrine_Expression instances.
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* @return integer the number of affected rows. Boolean false if empty value array was given,
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*/
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public function insert(Doctrine_Table $table, array $fields)
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{
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$tableName = $table->getTableName();
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// column names are specified as array keys
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$cols = array();
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// the query VALUES will contain either expresions (eg 'NOW()') or ?
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$a = array();
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foreach ($fields as $fieldName => $value) {
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if ($table->isIdentifier($fieldName)
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&& $table->isIdentifierAutoincrement()
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&& $value == null) {
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// Autoincrement fields should not be added to the insert statement
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// if their value is null
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unset($fields[$fieldName]);
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continue;
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}
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$cols[] = $this->quoteIdentifier($table->getColumnName($fieldName));
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if ($value instanceof Doctrine_Expression) {
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$a[] = $value->getSql();
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unset($fields[$fieldName]);
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} else {
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$a[] = '?';
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}
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}
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if (count($fields) == 0) {
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// Real fix #1786 and #2327 (default values when table is just 'id' as PK)
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return $this->exec('INSERT INTO ' . $this->quoteIdentifier($tableName)
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. ' '
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. ' VALUES (DEFAULT)');
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}
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// build the statement
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$query = 'INSERT INTO ' . $this->quoteIdentifier($tableName)
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. ' (' . implode(', ', $cols) . ')'
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. ' VALUES (' . implode(', ', $a) . ')';
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return $this->exec($query, array_values($fields));
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}
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}
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