213 lines
8.8 KiB
PHP
213 lines
8.8 KiB
PHP
<?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_Connection_Common');
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/**
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* Doctrine_Connection_Mysql
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*
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* @package Doctrine
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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 $Revision$
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* @category Object Relational Mapping
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* @link www.phpdoctrine.com
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* @since 1.0
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*/
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class Doctrine_Connection_Mysql extends Doctrine_Connection_Common {
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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 = 'Mysql';
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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|Doctrine_Adapter $adapter database handler
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*/
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public function __construct(Doctrine_Manager $manager, $adapter) {
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$adapter->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
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$this->supported = array(
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'sequences' => 'emulated',
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'indexes' => true,
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'affected_rows' => true,
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'transactions' => true,
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'savepoints' => false,
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'summary_functions' => true,
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'order_by_text' => true,
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'current_id' => 'emulated',
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'limit_queries' => true,
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'LOBs' => true,
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'replace' => true,
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'sub_selects' => true,
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'auto_increment' => true,
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'primary_key' => true,
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'result_introspection' => true,
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'prepared_statements' => 'emulated',
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'identifier_quoting' => true,
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'pattern_escaping' => true
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);
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parent::__construct($manager, $adapter);
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}
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/**
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* Returns the next free id of a sequence
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*
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* @param string $seq_name name of the sequence
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* @param boolean $ondemand when true the sequence is
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* automatic created, if it
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* not exists
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*
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* TODO: on demand creation of sequence table
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*
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* @return integer
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*/
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public function nextId($seqName, $ondemand = true) {
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$sequenceName = $this->quoteIdentifier($this->getSequenceName($seqName), true);
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$seqcolName = $this->quoteIdentifier($this->getAttribute(Doctrine::ATTR_SEQCOL_NAME), true);
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$query = 'INSERT INTO ' . $sequenceName . ' (' . $seqcolName . ') VALUES (NULL)';
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$value = $this->dbh->lastInsertId();
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if(is_numeric($value)) {
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$query = 'DELETE FROM ' . $sequenceName . ' WHERE ' . $seqcolName . ' < ' . $value;
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$result = $this->dbh->query($query);
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}
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return $value;
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}
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/**
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* Returns the current id of a sequence
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*
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* @param string $seq_name name of the sequence
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* @return integer
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*/
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public function currId($seqName) {
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$sequenceName = $this->quoteIdentifier($this->getSequenceName($seqName), true);
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$seqcolName = $this->quoteIdentifier($this->options['seqcol_name'], true);
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$query = 'SELECT MAX(' . $seqcolName . ') FROM ' . $sequenceName;
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return $this->queryOne($query, 'integer');
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}
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/**
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* Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
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* query, except that if there is already a row in the table with the same
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* key field values, the REPLACE query just updates its values instead of
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* inserting a new row.
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*
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* The REPLACE type of query does not make part of the SQL standards. Since
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* practically only MySQL implements it natively, this type of query is
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* emulated through this method for other DBMS using standard types of
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* queries inside a transaction to assure the atomicity of the operation.
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*
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* @access public
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*
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* @param string $table name of the table on which the REPLACE query will
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* be executed.
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* @param array $fields associative array that describes the fields and the
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* values that will be inserted or updated in the specified table. The
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* indexes of the array are the names of all the fields of the table. The
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* values of the array are also associative arrays that describe the
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* values and other properties of the table fields.
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*
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* Here follows a list of field properties that need to be specified:
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*
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* value:
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* Value to be assigned to the specified field. This value may be
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* of specified in database independent type format as this
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* function can perform the necessary datatype conversions.
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*
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* Default:
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* this property is required unless the Null property
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* is set to 1.
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*
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* type
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* Name of the type of the field. Currently, all types Metabase
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* are supported except for clob and blob.
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*
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* Default: no type conversion
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*
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* null
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* Boolean property that indicates that the value for this field
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* should be set to null.
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*
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* The default value for fields missing in INSERT queries may be
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* specified the definition of a table. Often, the default value
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* is already null, but since the REPLACE may be emulated using
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* an UPDATE query, make sure that all fields of the table are
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* listed in this function argument array.
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*
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* Default: 0
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*
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* key
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* Boolean property that indicates that this field should be
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* handled as a primary key or at least as part of the compound
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* unique index of the table that will determine the row that will
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* updated if it exists or inserted a new row otherwise.
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*
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* This function will fail if no key field is specified or if the
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* value of a key field is set to null because fields that are
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* part of unique index they may not be null.
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*
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* Default: 0
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*
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* @return integer the number of affected rows
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*/
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public function replace($table, array $fields, array $keys) {
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$count = count($fields);
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$query = $values = '';
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$keys = $colnum = 0;
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for(reset($fields); $colnum < $count; next($fields), $colnum++) {
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$name = key($fields);
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if ($colnum > 0) {
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$query .= ',';
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$values.= ',';
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}
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$query .= $name;
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if (isset($fields[$name]['null']) && $fields[$name]['null']) {
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$value = 'NULL';
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} else {
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$type = isset($fields[$name]['type']) ? $fields[$name]['type'] : null;
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$value = $this->quote($fields[$name]['value'], $type);
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}
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$values .= $value;
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if (isset($fields[$name]['key']) && $fields[$name]['key']) {
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if ($value === 'NULL')
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throw new Doctrine_Connection_Mysql_Exception('key value '.$name.' may not be NULL');
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$keys++;
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}
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}
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if ($keys == 0)
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throw new Doctrine_Connection_Mysql_Exception('not specified which fields are keys');
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$query = 'REPLACE INTO ' . $table . ' (' . $query . ') VALUES (' . $values . ')';
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return $this->dbh->exec($query);
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}
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}
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