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258 lines
8.8 KiB
PHP
258 lines
8.8 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Mysql.php 16942 2009-07-22 04:03:09Z ralph $
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*/
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/**
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* @see Zend_Db_Adapter_Pdo_Abstract
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*/
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require_once 'Zend/Db/Adapter/Pdo/Abstract.php';
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/**
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* Class for connecting to MySQL databases and performing common operations.
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*
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* @category Zend
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* @package Zend_Db
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* @subpackage Adapter
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Db_Adapter_Pdo_Mysql extends Zend_Db_Adapter_Pdo_Abstract
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{
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/**
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* PDO type.
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*
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* @var string
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*/
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protected $_pdoType = 'mysql';
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/**
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* Keys are UPPERCASE SQL datatypes or the constants
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* Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
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*
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* Values are:
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* 0 = 32-bit integer
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* 1 = 64-bit integer
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* 2 = float or decimal
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*
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* @var array Associative array of datatypes to values 0, 1, or 2.
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*/
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protected $_numericDataTypes = array(
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Zend_Db::INT_TYPE => Zend_Db::INT_TYPE,
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Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
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Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE,
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'INT' => Zend_Db::INT_TYPE,
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'INTEGER' => Zend_Db::INT_TYPE,
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'MEDIUMINT' => Zend_Db::INT_TYPE,
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'SMALLINT' => Zend_Db::INT_TYPE,
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'TINYINT' => Zend_Db::INT_TYPE,
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'BIGINT' => Zend_Db::BIGINT_TYPE,
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'SERIAL' => Zend_Db::BIGINT_TYPE,
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'DEC' => Zend_Db::FLOAT_TYPE,
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'DECIMAL' => Zend_Db::FLOAT_TYPE,
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'DOUBLE' => Zend_Db::FLOAT_TYPE,
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'DOUBLE PRECISION' => Zend_Db::FLOAT_TYPE,
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'FIXED' => Zend_Db::FLOAT_TYPE,
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'FLOAT' => Zend_Db::FLOAT_TYPE
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);
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/**
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* Creates a PDO object and connects to the database.
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*
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* @return void
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* @throws Zend_Db_Adapter_Exception
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*/
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protected function _connect()
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{
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if ($this->_connection) {
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return;
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}
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if (!empty($this->_config['charset'])) {
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$initCommand = "SET NAMES '" . $this->_config['charset'] . "'";
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$this->_config['driver_options'][1002] = $initCommand; // 1002 = PDO::MYSQL_ATTR_INIT_COMMAND
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}
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parent::_connect();
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}
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/**
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* @return string
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*/
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public function getQuoteIdentifierSymbol()
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{
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return "`";
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}
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/**
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* Returns a list of the tables in the database.
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*
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* @return array
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*/
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public function listTables()
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{
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return $this->fetchCol('SHOW TABLES');
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}
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/**
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* Returns the column descriptions for a table.
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*
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* The return value is an associative array keyed by the column name,
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* as returned by the RDBMS.
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*
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* The value of each array element is an associative array
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* with the following keys:
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*
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* SCHEMA_NAME => string; name of database or schema
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* TABLE_NAME => string;
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* COLUMN_NAME => string; column name
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* COLUMN_POSITION => number; ordinal position of column in table
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* DATA_TYPE => string; SQL datatype name of column
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* DEFAULT => string; default expression of column, null if none
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* NULLABLE => boolean; true if column can have nulls
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* LENGTH => number; length of CHAR/VARCHAR
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* SCALE => number; scale of NUMERIC/DECIMAL
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* PRECISION => number; precision of NUMERIC/DECIMAL
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* UNSIGNED => boolean; unsigned property of an integer type
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* PRIMARY => boolean; true if column is part of the primary key
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* PRIMARY_POSITION => integer; position of column in primary key
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* IDENTITY => integer; true if column is auto-generated with unique values
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*
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* @param string $tableName
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* @param string $schemaName OPTIONAL
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* @return array
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*/
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public function describeTable($tableName, $schemaName = null)
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{
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// @todo use INFORMATION_SCHEMA someday when MySQL's
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// implementation has reasonably good performance and
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// the version with this improvement is in wide use.
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if ($schemaName) {
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$sql = 'DESCRIBE ' . $this->quoteIdentifier("$schemaName.$tableName", true);
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} else {
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$sql = 'DESCRIBE ' . $this->quoteIdentifier($tableName, true);
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}
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$stmt = $this->query($sql);
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// Use FETCH_NUM so we are not dependent on the CASE attribute of the PDO connection
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$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
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$field = 0;
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$type = 1;
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$null = 2;
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$key = 3;
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$default = 4;
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$extra = 5;
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$desc = array();
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$i = 1;
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$p = 1;
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foreach ($result as $row) {
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list($length, $scale, $precision, $unsigned, $primary, $primaryPosition, $identity)
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= array(null, null, null, null, false, null, false);
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if (preg_match('/unsigned/', $row[$type])) {
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$unsigned = true;
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}
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if (preg_match('/^((?:var)?char)\((\d+)\)/', $row[$type], $matches)) {
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$row[$type] = $matches[1];
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$length = $matches[2];
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} else if (preg_match('/^decimal\((\d+),(\d+)\)/', $row[$type], $matches)) {
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$row[$type] = 'decimal';
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$precision = $matches[1];
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$scale = $matches[2];
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} else if (preg_match('/^float\((\d+),(\d+)\)/', $row[$type], $matches)) {
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$row[$type] = 'float';
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$precision = $matches[1];
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$scale = $matches[2];
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} else if (preg_match('/^((?:big|medium|small|tiny)?int)\((\d+)\)/', $row[$type], $matches)) {
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$row[$type] = $matches[1];
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// The optional argument of a MySQL int type is not precision
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// or length; it is only a hint for display width.
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}
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if (strtoupper($row[$key]) == 'PRI') {
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$primary = true;
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$primaryPosition = $p;
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if ($row[$extra] == 'auto_increment') {
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$identity = true;
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} else {
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$identity = false;
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}
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++$p;
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}
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$desc[$this->foldCase($row[$field])] = array(
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'SCHEMA_NAME' => null, // @todo
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'TABLE_NAME' => $this->foldCase($tableName),
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'COLUMN_NAME' => $this->foldCase($row[$field]),
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'COLUMN_POSITION' => $i,
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'DATA_TYPE' => $row[$type],
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'DEFAULT' => $row[$default],
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'NULLABLE' => (bool) ($row[$null] == 'YES'),
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'LENGTH' => $length,
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'SCALE' => $scale,
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'PRECISION' => $precision,
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'UNSIGNED' => $unsigned,
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'PRIMARY' => $primary,
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'PRIMARY_POSITION' => $primaryPosition,
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'IDENTITY' => $identity
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);
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++$i;
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}
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return $desc;
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}
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/**
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* Adds an adapter-specific LIMIT clause to the SELECT statement.
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*
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* @param string $sql
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* @param integer $count
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* @param integer $offset OPTIONAL
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* @throws Zend_Db_Adapter_Exception
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* @return string
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*/
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public function limit($sql, $count, $offset = 0)
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{
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$count = intval($count);
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if ($count <= 0) {
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/** @see Zend_Db_Adapter_Exception */
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception("LIMIT argument count=$count is not valid");
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}
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$offset = intval($offset);
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if ($offset < 0) {
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/** @see Zend_Db_Adapter_Exception */
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require_once 'Zend/Db/Adapter/Exception.php';
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throw new Zend_Db_Adapter_Exception("LIMIT argument offset=$offset is not valid");
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}
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$sql .= " LIMIT $count";
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if ($offset > 0) {
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$sql .= " OFFSET $offset";
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}
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return $sql;
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}
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}
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