File indexing completed on 2025-01-26 05:24:56

 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * @see Zend_Db_Adapter_Pdo_Abstract
  */
 // require_once 'Zend/Db/Adapter/Pdo/Abstract.php';
 
 
 /**
  * Class for connecting to MySQL databases and performing common operations.
  *
  * @category   Zend
  * @package    Zend_Db
  * @subpackage Adapter
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Db_Adapter_Pdo_Mysql extends Zend_Db_Adapter_Pdo_Abstract
 {
 
     /**
      * PDO type.
      *
      * @var string
      */
     protected $_pdoType = 'mysql';
 
     /**
      * 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
     );
 
     /**
      * Override _dsn() and ensure that charset is incorporated in mysql
      * @see Zend_Db_Adapter_Pdo_Abstract::_dsn()
      */
     protected function _dsn()
     {
         $dsn = parent::_dsn();
         if (isset($this->_config['charset'])) {
             $dsn .= ';charset=' . $this->_config['charset'];
         }
         return $dsn;
     }
     
     /**
      * Creates a PDO object and connects to the database.
      *
      * @return void
      * @throws Zend_Db_Adapter_Exception
      */
     protected function _connect()
     {
         if ($this->_connection) {
             return;
         }
 
         if (!empty($this->_config['charset'])
             && version_compare(PHP_VERSION, '5.3.6', '<')
         ) {
             $initCommand = "SET NAMES '" . $this->_config['charset'] . "'";
             $this->_config['driver_options'][1002] = $initCommand; // 1002 = PDO::MYSQL_ATTR_INIT_COMMAND
         }
 
         parent::_connect();
     }
 
     /**
      * @return string
      */
     public function getQuoteIdentifierSymbol()
     {
         return "`";
     }
 
     /**
      * Returns a list of the tables in the database.
      *
      * @return array
      */
     public function listTables()
     {
         return $this->fetchCol('SHOW TABLES');
     }
 
     /**
      * 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 has reasonably good performance and
         // the version with this improvement is in wide use.
 
         if ($schemaName) {
             $sql = 'DESCRIBE ' . $this->quoteIdentifier("$schemaName.$tableName", true);
         } else {
             $sql = 'DESCRIBE ' . $this->quoteIdentifier($tableName, true);
         }
         $stmt = $this->query($sql);
 
         // Use FETCH_NUM so we are not dependent on the CASE attribute of the PDO connection
         $result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
 
         $field   = 0;
         $type    = 1;
         $null    = 2;
         $key     = 3;
         $default = 4;
         $extra   = 5;
 
         $desc = array();
         $i = 1;
         $p = 1;
         foreach ($result as $row) {
             list($length, $scale, $precision, $unsigned, $primary, $primaryPosition, $identity)
                 = array(null, null, null, null, false, null, false);
             if (preg_match('/unsigned/', $row[$type])) {
                 $unsigned = true;
             }
             if (preg_match('/^((?:var)?char)\((\d+)\)/', $row[$type], $matches)) {
                 $row[$type] = $matches[1];
                 $length = $matches[2];
             } else if (preg_match('/^decimal\((\d+),(\d+)\)/', $row[$type], $matches)) {
                 $row[$type] = 'decimal';
                 $precision = $matches[1];
                 $scale = $matches[2];
             } else if (preg_match('/^float\((\d+),(\d+)\)/', $row[$type], $matches)) {
                 $row[$type] = 'float';
                 $precision = $matches[1];
                 $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') {
                 $primary = true;
                 $primaryPosition = $p;
                 if ($row[$extra] == 'auto_increment') {
                     $identity = true;
                 } else {
                     $identity = false;
                 }
                 ++$p;
             }
             $desc[$this->foldCase($row[$field])] = array(
                 'SCHEMA_NAME'      => null, // @todo
                 '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'           => $length,
                 'SCALE'            => $scale,
                 'PRECISION'        => $precision,
                 'UNSIGNED'         => $unsigned,
                 'PRIMARY'          => $primary,
                 'PRIMARY_POSITION' => $primaryPosition,
                 'IDENTITY'         => $identity
             );
             ++$i;
         }
         return $desc;
     }
 
     /**
      * Adds an adapter-specific LIMIT clause to the SELECT statement.
      *
      * @param  string $sql
      * @param  integer $count
      * @param  integer $offset OPTIONAL
      * @throws Zend_Db_Adapter_Exception
      * @return string
      */
      public function limit($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;
     }
 
 }