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<?php
/**
* @version $Id$
* @package Koowa_Database
* @subpackage Adapter
* @copyright Copyright (C) 2007 - 2012 Johan Janssens. All rights reserved.
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
* @link http://www.nooku.org
*/
/**
* Mysqli Database Adapter
*
* @author Johan Janssens <johan@nooku.org>
* @package Koowa_Database
* @subpackage Adapter
*/
class KDatabaseAdapterMysqli extends KDatabaseAdapterAbstract
{
/**
* Quote for named objects
*
* @var string
*/
protected $_name_quote = '`';
/**
* Map of native MySQL types to generic types used when reading
* table column information.
*
* @var array
*/
protected $_typemap = array(
// numeric
'smallint' => 'int',
'int' => 'int',
'integer' => 'int',
'bigint' => 'int',
'mediumint' => 'int',
'smallint' => 'int',
'tinyint' => 'int',
'numeric' => 'numeric',
'dec' => 'numeric',
'decimal' => 'numeric',
'float' => 'float' ,
'double' => 'float' ,
'real' => 'float' ,
// boolean
'bool' => 'boolean',
'boolean' => 'boolean',
// date & time
'date' => 'date' ,
'time' => 'time' ,
'datetime' => 'timestamp',
'timestamp' => 'int' ,
'year' => 'int' ,
// string
'national char' => 'string',
'nchar' => 'string',
'char' => 'string',
'binary' => 'string',
'national varchar' => 'string',
'nvarchar' => 'string',
'varchar' => 'string',
'varbinary' => 'string',
'text' => 'string',
'mediumtext' => 'string',
'tinytext' => 'string',
'longtext' => 'string',
// blob
'blob' => 'raw',
'tinyblob' => 'raw',
'mediumblob' => 'raw',
'longtext' => 'raw',
'longblob' => 'raw',
//other
'set' => 'string',
'enum' => 'string',
);
/**
* The database name of the active connection
*
* @var string
*/
protected $_database;
/**
* Initializes the options for the object
*
* Called from {@link __construct()} as a first step of object instantiation.
*
* @param object An optional KConfig object with configuration options.
* @return void
*/
protected function _initialize(KConfig $config)
{
$config->append(array(
'options' => array(
'host' => ini_get('mysqli.default_host'),
'username' => ini_get('mysqli.default_user'),
'password' => ini_get('mysqli.default_pw'),
'database' => '',
'port' => ini_get("mysqli.default_port"),
'socket' => ini_get("mysqli.default_socket")
)
));
parent::_initialize($config);
}
/**
* Connect to the db
*
* @return KDatabaseAdapterMysqli
*/
public function connect()
{
$oldErrorReporting = error_reporting(0);
$mysqli = new mysqli(
$this->_options->host,
$this->_options->username,
$this->_options->password,
$this->_options->database,
$this->_options->port,
$this->_options->socket
);
error_reporting($oldErrorReporting);
if (mysqli_connect_errno()) {
throw new KDatabaseAdapterException('Connect failed: (' . mysqli_connect_errno() . ') ' . mysqli_connect_error(), mysqli_connect_errno());
}
// If supported, request real datatypes from MySQL instead of returning everything as a string.
if (defined('MYSQLI_OPT_INT_AND_FLOAT_NATIVE')) {
$mysqli->options(MYSQLI_OPT_INT_AND_FLOAT_NATIVE, true);
}
$this->_connection = $mysqli;
$this->_connected = true;
$this->_database = $this->_options->database;
return $this;
}
/**
* Disconnect from db
*
* @return KDatabaseAdapterMysqli
*/
public function disconnect()
{
if ($this->isConnected())
{
$this->_connection->close();
$this->_connection = null;
$this->_connected = false;
}
return $this;
}
/**
* Check if the connection is active
*
* @return boolean
*/
public function isConnected()
{
return ($this->_connection instanceof MySQLi) && @$this->_connection->ping();
}
/**
* Set the connection
*
* @param resource The connection resource
* @return KDatabaseAdapterAbstract
* @throws KDatabaseAdapterException If the resource is not an MySQLi instance
*/
public function setConnection($resource)
{
if(!($resource instanceof MySQLi)) {
throw new KDatabaseAdapterException('Not a MySQLi connection');
}
$this->_connection = $resource;
return $this;
}
/**
* Get the database name
*
* @return string The database name
*/
public function getDatabase()
{
if(!isset($this->_database)) {
$this->_database = $this->select("SELECT DATABASE()", KDatabase::FETCH_FIELD);
}
return $this->_database;
}
/**
* Set the database name
*
* @param string The database name
* @return KDatabaseAdapterAbstract
*/
public function setDatabase($database)
{
if(!$this->_connection->select_db($database)) {
throw new KDatabaseException('Could not connect with database : '.$database);
}
$this->_database = $database;
return $this;
}
/**
* Retrieves the table schema information about the given table
*
* @param string A table name or a list of table names
* @return KDatabaseSchemaTable
*/
public function getTableSchema($table)
{
if(!isset($this->_table_schema[$table]))
{
$this->_table_schema[$table] = $this->_fetchTableInfo($table);
$this->_table_schema[$table]->indexes = $this->_fetchTableIndexes($table);
$this->_table_schema[$table]->columns = $this->_fetchTableColumns($table);
}
return $this->_table_schema[$table];
}
/**
* Lock a table.
*
* @param string Base name of the table.
* @param string Real name of the table.
* @return boolean True on success, false otherwise.
*/
public function lockTable($base, $name)
{
$query = 'LOCK TABLES '.$this->quoteName($this->getTableNeedle().$base).' WRITE';
if($base != $name) {
$query .= ', '.$this->quoteName($this->getTableNeedle().$name).' READ';
}
// Create commandchain context.
$context = $this->getCommandContext();
$context->table = $base;
$context->query = $query;
if($this->getCommandChain()->run('before.locktable', $context) !== false)
{
$context->result = $this->execute($context->query, KDatabase::RESULT_USE);
$this->getCommandChain()->run('after.locktable', $context);
}
return $context->result;
}
/**
* Unlock a table.
*
* @return boolean True on success, false otherwise.
*/
public function unlockTable()
{
$query = 'UNLOCK TABLES';
// Create commandchain context.
$context = $this->getCommandContext();
$context->table = $base;
$context->query = $query;
if($this->getCommandChain()->run('before.unlocktable', $context) !== false)
{
$context->result = $this->execute($context->query, KDatabase::RESULT_USE);
$this->getCommandChain()->run('after.unlocktable', $context);
}
return $context->result;
}
/**
* Fetch the first field of the first row
*
* @param mysqli_result The result object. A result set identifier returned by the select() function
* @param integer The index to use
* @return The value returned in the query or null if the query failed.
*/
protected function _fetchField($result, $key = 0)
{
$return = null;
if($row = $result->fetch_row( )) {
$return = $row[(int)$key];
}
$result->free();
return $return;
}
/**
* Fetch an array of single field results
*
*
* @param mysqli_result The result object. A result set identifier returned by the select() function
* @param integer The index to use
* @return array A sequential array of returned rows.
*/
protected function _fetchFieldList($result, $key = 0)
{
$array = array();
while ($row = $result->fetch_row( )) {
$array[] = $row[(int)$key];
}
$result->free();
return $array;
}
/**
* Fetch the first row of a result set as an associative array
*
* @param mysqli_result The result object. A result set identifier returned by the select() function
* @return array
*/
protected function _fetchArray($result)
{
$array = $result->fetch_assoc( );
$result->free();
return $array;
}
/**
* Fetch all result rows of a result set as an array of associative arrays
*
* If <var>key</var> is not empty then the returned array is indexed by the value
* of the database key. Returns <var>null</var> if the query fails.
*
* @param mysqli_result The result object. A result set identifier returned by the select() function
* @param string The column name of the index to use
* @return array If key is empty as sequential list of returned records.
*/
protected function _fetchArrayList($result, $key = '')
{
$array = array();
while ($row = $result->fetch_assoc( ))
{
if ($key) {
$array[$row[$key]] = $row;
} else {
$array[] = $row;
}
}
$result->free();
return $array;
}
/**
* Fetch the first row of a result set as an object
*
* @param mysqli_result The result object. A result set identifier returned by the select() function
* @param object
*/
protected function _fetchObject($result)
{
$object = $result->fetch_object( );
$result->free();
return $object;
}
/**
* Fetch all rows of a result set as an array of objects
*
* If <var>key</var> is not empty then the returned array is indexed by the value
* of the database key. Returns <var>null</var> if the query fails.
*
* @param mysqli_result The result object. A result set identifier returned by the select() function
* @param string The column name of the index to use
* @return array If <var>key</var> is empty as sequential array of returned rows.
*/
protected function _fetchObjectList($result, $key='')
{
$array = array();
while ($row = $result->fetch_object( ))
{
if ($key) {
$array[$row->$key] = $row;
} else {
$array[] = $row;
}
}
$result->free();
return $array;
}
/**
* Safely quotes a value for an SQL statement.
*
* @param mixed The value to quote
* @return string An SQL-safe quoted value
*/
protected function _quoteValue($value)
{
$value = '\''.mysqli_real_escape_string( $this->_connection, $value ).'\'';
return $value;
}
/**
* Retrieves the table schema information about the given tables
*
* @param array|string A table name or a list of table names
* @return DatabaseSchemaTable or NULL if the table doesn't exist
*/
protected function _fetchTableInfo($table)
{
$result = null;
$sql = $this->quoteValue($this->getTableNeedle().$table);
if($info = $this->show( 'SHOW TABLE STATUS LIKE '.$sql, KDatabase::FETCH_OBJECT ))
{
//Parse the table raw schema data
$result = $this->_parseTableInfo($info);
}
return $result;
}
/**
* Retrieves the column schema information about the given table
*
* @param string A table name
* @return array An array of columns
*/
protected function _fetchTableColumns($table)
{
$result = array();
$sql = $this->quoteName($this->getTableNeedle().$table);
if($columns = $this->show( 'SHOW FULL COLUMNS FROM '.$sql, KDatabase::FETCH_OBJECT_LIST))
{
foreach($columns as $column)
{
//Set the table name in the raw info (MySQL doesn't add this)
$column->Table = $table;
//Parse the column raw schema data
$column = $this->_parseColumnInfo($column, $table);
$result[$column->name] = $column;
}
}
return $result;
}
/**
* Retrieves the index information about the given table
*
* @param string A table name
* @return array An associative array of indexes by index name
*/
protected function _fetchTableIndexes($table)
{
$result = array();
$sql = $this->quoteName($this->getTableNeedle().$table);
if($indexes = $this->show('SHOW INDEX FROM '.$sql , KDatabase::FETCH_OBJECT_LIST))
{
foreach ($indexes as $index) {
$result[$index->Key_name][$index->Seq_in_index] = $index;
}
}
return $result;
}
/**
* Parse the raw table schema information
*
* @param object The raw table schema information
* @return KDatabaseSchemaTable
*/
protected function _parseTableInfo($info)
{
$table = new KDatabaseSchemaTable;
$table->name = $info->Name;
$table->engine = $info->Engine;
$table->type = $info->Comment == 'VIEW' ? 'VIEW' : 'BASE';
$table->length = $info->Data_length;
$table->autoinc = $info->Auto_increment;
$table->collation = $info->Collation;
$table->behaviors = array();
$table->description = $info->Comment != 'VIEW' ? $info->Comment : '';
return $table;
}
/**
* Parse the raw column schema information
*
* @param object The raw column schema information
* @return KDatabaseSchemaColumn
*/
protected function _parseColumnInfo($info)
{
//Parse the filter information from the comment
$filter = array();
preg_match('#@Filter\("(.*)"\)#Ui', $info->Comment, $filter);
list($type, $length, $scope) = $this->_parseColumnType($info->Type);
$column = $this->getService('koowa:database.schema.column');
$column->name = $info->Field;
$column->type = $type;
$column->length = ($length ? $length : null);
$column->scope = ($scope ? (int) $scope : null);
$column->default = $info->Default;
$column->required = (bool) ($info->Null != 'YES');
$column->primary = (bool) ($info->Key == 'PRI');
$column->unique = (bool) ($info->Key == 'UNI' || $info->Key == 'PRI');
$column->autoinc = (bool) (strpos($info->Extra, 'auto_increment') !== false);
$column->filter = isset($filter[1]) ? explode(',', $filter[1]) : $this->_typemap[$type];
// Don't keep "size" for integers
if (substr($type, -3) == 'int') {
$column->length = null;
}
// Get the related fields if the column is primary key or part of a unqiue multi column index
if($indexes = $this->_table_schema[$info->Table]->indexes)
{
foreach($indexes as $index)
{
//We only deal with composite-unique indexes
if(count($index) > 1 && !$index[1]->Non_unique)
{
$fields = array();
foreach($index as $field) {
$fields[$field->Column_name] = $field->Column_name;
}
if(array_key_exists($column->name, $fields))
{
unset($fields[$column->name]);
$column->related = array_values($fields);
$column->unique = true;
break;
}
}
}
}
return $column;
}
/**
* Given a raw column specification, parse into datatype, length, and decimal scope.
*
* @param string The column specification; for example,
* "VARCHAR(255)" or "NUMERIC(10,2)" or "float(6,2) UNSIGNED" or ENUM('yes','no','maybe')
*
* @return array A sequential array of the column type, size, and scope.
*/
protected function _parseColumnType($spec)
{
$spec = strtolower($spec);
$type = null;
$length = null;
$scope = null;
// find the type first
$type = strtok($spec, '( ');
// find the parens, if any
if (false !== ($pos = strpos($spec, '(')))
{
// there were parens, so there's at least a length
// remove parens to get the size.
$length = trim(substr(strtok($spec, ' '), $pos), '()');
if($type != 'enum' && $type != 'set')
{
// A comma in the size indicates a scope.
$pos = strpos($length, ',');
if ($pos !== false)
{
$scope = substr($length, $pos + 1);
$length = substr($length, 0, $pos);
}
}
else $length = explode(',', str_replace("'", "", $length));
}
return array($type, $length, $scope);
}
}
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