<?php
/**
* Zend Framework, MySQL Adapter
*
* @category Zend
* @package Zend_Db
* @subpackage Adapter
* @copyright Jenei Viktor Attila
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
*/
/**
* @see Zend_Db_Adapter_Abstract
*/
require_once 'Zend/Db/Adapter/Abstract.php';
/**
* @see Zend_Db_Profiler
*/
require_once 'Zend/Db/Profiler.php';
/**
* @see Zend_Db_Select
*/
require_once 'Zend/Db/Select.php';
/**
* @see Zend_Db_Statement_Mysqli
*/
require_once 'Zend/Db/Statement/Mysql.php';
/**
* @category Zend
* @package Zend_Db
* @subpackage Adapter
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Db_Adapter_Mysql extends Zend_Db_Adapter_Abstract {
/**
* Keys are UPPERCASE SQL datatypes or the constants
* Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
*
* Values are:
* 0 = 32-bit integer
* 1 = 64-bit integer
* 2 = float or decimal
*
* @var array Associative array of datatypes to values 0, 1, or 2.
*/
protected $_numericDataTypes = array(
Zend_Db::INT_TYPE => Zend_Db::INT_TYPE,
Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE,
'INT' => Zend_Db::INT_TYPE,
'INTEGER' => Zend_Db::INT_TYPE,
'MEDIUMINT' => Zend_Db::INT_TYPE,
'SMALLINT' => Zend_Db::INT_TYPE,
'TINYINT' => Zend_Db::INT_TYPE,
'BIGINT' => Zend_Db::BIGINT_TYPE,
'SERIAL' => Zend_Db::BIGINT_TYPE,
'DEC' => Zend_Db::FLOAT_TYPE,
'DECIMAL' => Zend_Db::FLOAT_TYPE,
'DOUBLE' => Zend_Db::FLOAT_TYPE,
'DOUBLE PRECISION' => Zend_Db::FLOAT_TYPE,
'FIXED' => Zend_Db::FLOAT_TYPE,
'FLOAT' => Zend_Db::FLOAT_TYPE
);
/**
* @var Zend_Db_Statement_Mysqli
*/
protected $_stmt = null;
/**
* Default class name for a DB statement.
*
* @var string
*/
protected $_defaultStmtClass = 'Zend_Db_Statement_Mysql';
/**
* Quote a raw string.
*
* @param mixed $value Raw string
*
* @return string Quoted string
*/
protected function _quote( $value ) {
if ( is_int( $value ) || is_float( $value ) ) {
return $value;
}
$this->_connect();
return "'" . mysql_real_escape_string( $value, $this->_connection ) . "'";
}
/**
* Returns the symbol the adapter uses for delimiting identifiers.
*
* @return string
*/
public function getQuoteIdentifierSymbol() {
return "`";
}
/**
* Returns a list of the tables in the database.
*
* @return array
*/
public function listTables() {
$result = array();
$sql = 'SHOW TABLES';
if ( $queryResult = mysql_query( $sql, $this->getConnection() ) ) {
while ( $row = mysql_fetch_row( $queryResult ) ) {
$result[] = $row[0];
}
} else {
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception( mysql_error( $this->getConnection() ) );
}
return $result;
}
/**
* Returns the column descriptions for a table.
*
* The return value is an associative array keyed by the column name,
* as returned by the RDBMS.
*
* The value of each array element is an associative array
* with the following keys:
*
* SCHEMA_NAME => string; name of database or schema
* TABLE_NAME => string;
* COLUMN_NAME => string; column name
* COLUMN_POSITION => number; ordinal position of column in table
* DATA_TYPE => string; SQL datatype name of column
* DEFAULT => string; default expression of column, null if none
* NULLABLE => boolean; true if column can have nulls
* LENGTH => number; length of CHAR/VARCHAR
* SCALE => number; scale of NUMERIC/DECIMAL
* PRECISION => number; precision of NUMERIC/DECIMAL
* UNSIGNED => boolean; unsigned property of an integer type
* PRIMARY => boolean; true if column is part of the primary key
* PRIMARY_POSITION => integer; position of column in primary key
* IDENTITY => integer; true if column is auto-generated with unique values
*
* @param string $tableName
* @param string $schemaName OPTIONAL
* @return array
*/
public function describeTable($tableName, $schemaName = null) {
/**
* @todo use INFORMATION_SCHEMA someday when
* MySQL's implementation isn't too slow.
*/
if ( $schemaName ) {
$sql = 'DESCRIBE ' . $this->quoteIdentifier("$schemaName.$tableName", true);
} else {
$sql = 'DESCRIBE ' . $this->quoteIdentifier($tableName, true);
}
/**
* Use mysqli extension API, because DESCRIBE doesn't work
* well as a prepared statement on MySQL 4.1.
*/
if ( $queryResult = mysql_query( $sql, $this->getConnection() ) ) {
while ( $row = mysql_fetch_assoc( $queryResult ) ) {
$result[] = $row;
}
} else {
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception($this->getConnection()->error);
}
$desc = array();
$row_defaults = array(
'Length' => null,
'Scale' => null,
'Precision' => null,
'Unsigned' => null,
'Primary' => false,
'PrimaryPosition' => null,
'Identity' => false
);
$i = 1;
$p = 1;
foreach ( $result as $key => $row ) {
$row = array_merge( $row_defaults, $row );
if ( preg_match( '/unsigned/', $row['Type'] ) ) {
$row[ 'Unsigned' ] = true;
}
if ( preg_match( '/^((?:var)?char)\((\d+)\)/', $row['Type'], $matches ) ) {
$row['Type'] = $matches[1];
$row['Length'] = $matches[2];
} else if ( preg_match( '/^decimal\((\d+),(\d+)\)/', $row['Type'], $matches ) ) {
$row['Type'] = 'decimal';
$row['Precision'] = $matches[1];
$row['Scale'] = $matches[2];
} else if ( preg_match( '/^float\((\d+),(\d+)\)/', $row['Type'], $matches ) ) {
$row['Type'] = 'float';
$row['Precision'] = $matches[1];
$row['Scale'] = $matches[2];
} else if ( preg_match( '/^((?:big|medium|small|tiny)?int)\((\d+)\)/', $row['Type'], $matches ) ) {
$row['Type'] = $matches[1];
/**
* The optional argument of a MySQL int type is not precision
* or length; it is only a hint for display width.
*/
}
if ( strtoupper( $row['Key'] ) == 'PRI' ) {
$row['Primary'] = true;
$row['PrimaryPosition'] = $p;
if ( $row['Extra'] == 'auto_increment' ) {
$row['Identity'] = true;
} else {
$row['Identity'] = false;
}
++$p;
}
$desc[ $this->foldCase( $row['Field'] ) ] = array(
'SCHEMA_NAME' => null,
'TABLE_NAME' => $this->foldCase( $tableName ),
'COLUMN_NAME' => $this->foldCase( $row['Field'] ),
'COLUMN_POSITION' => $i,
'DATA_TYPE' => $row['Type'],
'DEFAULT' => $row['Default'],
'NULLABLE' => (bool) ( $row['Null'] == 'YES' ),
'LENGTH' => $row['Length'],
'SCALE' => $row['Scale'],
'PRECISION' => $row['Precision'],
'UNSIGNED' => $row['Unsigned'],
'PRIMARY' => $row['Primary'],
'PRIMARY_POSITION' => $row['PrimaryPosition'],
'IDENTITY' => $row['Identity']
);
++$i;
}
return $desc;
}
/**
* Creates a connection to the database.
*
* @return void
* @throws Zend_Db_Adapter_Exception
*/
protected function _connect() {
if ( $this->_connection ) {
return;
}
if ( !extension_loaded( 'mysql' ) ) {
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception( 'The Mysql extension is required for this adapter but the extension is not loaded' );
}
if ( isset($this->_config['port'] ) ) {
$port = (integer) $this->_config['port'];
} else {
$port = null;
}
$this->_connection = mysql_connect(
$this->_config['host'],
$this->_config['username'],
$this->_config['password']
);
@mysql_selectdb( $this->_config['dbname'], $this->_connection );
$_isConnected = true;
if ( !$this->_connection ) { $_isConnected = false; }
if ( $_isConnected === false ) {
$this->closeConnection();
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception( mysql_error() );
}
if ( !empty( $this->_config['charset'] ) ) {
mysql_set_charset( $this->_config['charset'] , $this->_connection );
}
}
/**
* Test if a connection is active
*
* @return boolean
*/
public function isConnected() {
return $this->_isConnected;
}
/**
* Force the connection to close.
*
* @return void
*/
public function closeConnection() {
if ( $this->isConnected() ) {
@mysql_close( $this->_connection );
}
$this->_connection = null;
$this->_isConnected = false;
}
/**
* Prepare a statement and return a PDOStatement-like object.
*
* @param string $sql SQL query
* @return Zend_Db_Statement_Mysqli
*/
public function prepare( $sql ) {
$this->_connect();
if ( $this->_stmt ) {
$this->_stmt->close();
}
$stmtClass = $this->_defaultStmtClass;
if ( !class_exists( $stmtClass ) ) {
require_once 'Zend/Loader.php';
Zend_Loader::loadClass( $stmtClass );
}
$stmt = new $stmtClass( $this, $sql );
if ( $stmt === false ) {
return false;
}
$stmt->setFetchMode( $this->_fetchMode );
$this->_stmt = $stmt;
return $stmt;
}
/**
* Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
*
* As a convention, on RDBMS brands that support sequences
* (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
* from the arguments and returns the last id generated by that sequence.
* On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
* returns the last value generated for such a column, and the table name
* argument is disregarded.
*
* MySQL does not support sequences, so $tableName and $primaryKey are ignored.
*
* @param string $tableName OPTIONAL Name of table.
* @param string $primaryKey OPTIONAL Name of primary key column.
* @return string
* @todo Return value should be int?
*/
public function lastInsertId( $tableName = null, $primaryKey = null ) {
return (string) mysql_insert_id( $this->_connection );
}
/**
* Begin a transaction.
*
* @return void
*/
protected function _beginTransaction() {
$this->_connect();
@mysql_query( 'BEGIN;', $this->_connection );
}
/**
* Commit a transaction.
*
* @return void
*/
protected function _commit() {
$this->_connect();
@mysql_query( 'COMMIT;', $this->_connection );
}
/**
* Roll-back a transaction.
*
* @return void
*/
protected function _rollBack() {
$this->_connect();
@mysql_query( 'ROLLBACK;', $this->_connection );
}
/**
* Set the fetch mode.
*
* @param int $mode
* @return void
* @throws Zend_Db_Adapter_Exception
*/
public function setFetchMode( $mode ) {
switch ( $mode ) {
case Zend_Db::FETCH_LAZY:
case Zend_Db::FETCH_ASSOC:
case Zend_Db::FETCH_NUM:
case Zend_Db::FETCH_BOTH:
case Zend_Db::FETCH_NAMED:
case Zend_Db::FETCH_OBJ:
$this->_fetchMode = $mode;
break;
case Zend_Db::FETCH_BOUND:
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception( 'FETCH_BOUND is not supported yet' );
break;
default:
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception( "Invalid fetch mode '$mode' specified" );
}
}
/**
* Adds an adapter-specific LIMIT clause to the SELECT statement.
*
* @param string $sql
* @param int $count
* @param int $offset OPTIONAL
* @return string
*/
public function limit( $sql, $count, $offset = 0 ) {
$count = intval( $count );
if ( $count <= 0 ) {
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception("LIMIT argument count=$count is not valid");
}
$offset = intval( $offset );
if ( $offset < 0 ) {
/**
* @see Zend_Db_Adapter_Exception
*/
require_once 'Zend/Db/Adapter/Exception.php';
throw new Zend_Db_Adapter_Exception( "LIMIT argument offset=$offset is not valid" );
}
$sql .= " LIMIT $count";
if ( $offset > 0 ) {
$sql .= " OFFSET $offset";
}
return $sql;
}
/**
* Check if the adapter supports real SQL parameters.
*
* @param string $type 'positional' or 'named'
* @return bool
*/
public function supportsParameters( $type ) {
switch ( $type ) {
case 'positional':
return true;
case 'named':
default:
return false;
}
}
/**
* Retrieve server version in PHP style
*
*@return string
*/
public function getServerVersion() {
/* example: MySQL server version: 4.0.1-alpha */
$this->_connect();
$version = mysql_get_server_info( $this->_connection );
$pos = strpos( $version, ':' );
$version = substr( $version, $pos + 1, strlen( $version ) );
return $version;
}
}
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