mysqli.php
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mysqli.php
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	<?php
	// +----------------------------------------------------------------------+
	// \| PHP versions 4 and 5 \|
	// +----------------------------------------------------------------------+
	// \| Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, \|
	// \| Stig. S. Bakken, Lukas Smith \|
	// \| All rights reserved. \|
	// +----------------------------------------------------------------------+
	// \| MDB2 is a merge of PEAR DB and Metabases that provides a unified DB \|
	// \| API as well as database abstraction for PHP applications. \|
	// \| This LICENSE is in the BSD license style. \|
	// \| \|
	// \| Redistribution and use in source and binary forms, with or without \|
	// \| modification, are permitted provided that the following conditions \|
	// \| are met: \|
	// \| \|
	// \| Redistributions of source code must retain the above copyright \|
	// \| notice, this list of conditions and the following disclaimer. \|
	// \| \|
	// \| Redistributions in binary form must reproduce the above copyright \|
	// \| notice, this list of conditions and the following disclaimer in the \|
	// \| documentation and/or other materials provided with the distribution. \|
	// \| \|
	// \| Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, \|
	// \| Lukas Smith nor the names of his contributors may be used to endorse \|
	// \| or promote products derived from this software without specific prior\|
	// \| written permission. \|
	// \| \|
	// \| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \|
	// \| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT \|
	// \| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS \|
	// \| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE \|
	// \| REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, \|
	// \| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, \|
	// \| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS\|
	// \| OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED \|
	// \| AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT \|
	// \| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY\|
	// \| WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE \|
	// \| POSSIBILITY OF SUCH DAMAGE. \|
	// +----------------------------------------------------------------------+
	// \| Author: Lukas Smith <smith@pooteeweet.org> \|
	// +----------------------------------------------------------------------+
	//
	// $Id$
	//

	require_once 'MDB2/Driver/Manager/Common.php';

	/**
	* MDB2 MySQLi driver for the management modules
	*
	* @package MDB2
	* @category Database
	* @author Lukas Smith <smith@pooteeweet.org>
	*/
	class MDB2_Driver_Manager_mysqli extends MDB2_Driver_Manager_Common
	{
	// {{{ properties
	var $verified_table_types = array();#
	// }}}

	// }}}
	// {{{ _verifyTableType()

	/**
	* verify that chosen transactional table hanlder is available in the database
	*
	* @param string $table_type name of the table handler
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access protected
	*/
	function _verifyTableType($table_type)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	switch (strtoupper($table_type)) {
	case 'BERKELEYDB':
	case 'BDB':
	$check = array('have_bdb');
	break;
	case 'INNODB':
	$check = array('have_innobase', 'have_innodb');
	break;
	case 'GEMINI':
	$check = array('have_gemini');
	break;
	case 'HEAP':
	case 'ISAM':
	case 'MERGE':
	case 'MRG_MYISAM':
	case 'MYISAM':
	case '':
	return MDB2_OK;
	default:
	return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
	$table_type.' is not a supported table type');
	}
	if (isset($this->verified_table_types[$table_type])
	&& $this->verified_table_types[$table_type] == $db->connection
	) {
	return MDB2_OK;
	}
	$not_supported = false;
	for ($i = 0, $j = count($check); $i < $j; ++$i) {
	$query = 'SHOW VARIABLES LIKE '.$db->quote($check[$i], 'text');
	$has = $db->queryRow($query, null, MDB2_FETCHMODE_ORDERED);
	if (PEAR::isError($has)) {
	return $has;
	}
	if (is_array($has)) {
	$not_supported = true;
	if ($has[1] == 'YES') {
	$this->verified_table_types[$table_type] = $db->connection;
	return MDB2_OK;
	}
	}
	}
	if ($not_supported) {
	return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
	$table_type.' is not a supported table type by this MySQL database server');
	}
	return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
	'could not tell if '.$table_type.' is a supported table type');
	}

	// }}}
	// {{{ createDatabase()

	/**
	* create a new database
	*
	* @param string $name name of the database that should be created
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function createDatabase($name)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$query = 'CREATE DATABASE '.$name;
	$result = $db->query($query);
	if (PEAR::isError($result)) {
	return $result;
	}
	return MDB2_OK;
	}

	// }}}
	// {{{ dropDatabase()

	/**
	* drop an existing database
	*
	* @param string $name name of the database that should be dropped
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function dropDatabase($name)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$query = 'DROP DATABASE '.$name;
	$result = $db->query($query);
	if (PEAR::isError($result)) {
	return $result;
	}
	return MDB2_OK;
	}

	// }}}
	// {{{ createTable()

	/**
	* create a new table
	*
	* @param string $name Name of the database that should be created
	* @param array $fields Associative array that contains the definition of each field of the new table
	* The indexes of the array entries are the names of the fields of the table an
	* the array entry values are associative arrays like those that are meant to be
	* passed with the field definitions to get[Type]Declaration() functions.
	*
	* Example
	* array(
	*
	* 'id' => array(
	* 'type' => 'integer',
	* 'unsigned' => 1
	* 'notnull' => 1
	* 'default' => 0
	* ),
	* 'name' => array(
	* 'type' => 'text',
	* 'length' => 12
	* ),
	* 'password' => array(
	* 'type' => 'text',
	* 'length' => 12
	* )
	* );
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function createTable($name, $fields)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	if (!$name) {
	return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
	'createTable: no valid table name specified');
	}
	if (empty($fields)) {
	return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
	'createTable: no fields specified for table "'.$name.'"');
	}
	$verify = $this->_verifyTableType($db->options['default_table_type']);
	if (PEAR::isError($verify)) {
	return $verify;
	}
	$query_fields = $this->getFieldDeclarationList($fields);
	if (PEAR::isError($query_fields)) {
	return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
	'createTable: '.$this->getUserinfo());
	}
	$query = "CREATE TABLE $name ($query_fields)".(strlen($db->options['default_table_type'])
	? ' TYPE='.$db->options['default_table_type'] : '');

	return $db->query($query);
	}

	// }}}
	// {{{ alterTable()

	/**
	* alter an existing table
	*
	* @param string $name name of the table that is intended to be changed.
	* @param array $changes associative array that contains the details of each type
	* of change that is intended to be performed. The types of
	* changes that are currently supported are defined as follows:
	*
	* name
	*
	* New name for the table.
	*
	* add
	*
	* Associative array with the names of fields to be added as
	* indexes of the array. The value of each entry of the array
	* should be set to another associative array with the properties
	* of the fields to be added. The properties of the fields should
	* be the same as defined by the Metabase parser.
	*
	*
	* remove
	*
	* Associative array with the names of fields to be removed as indexes
	* of the array. Currently the values assigned to each entry are ignored.
	* An empty array should be used for future compatibility.
	*
	* rename
	*
	* Associative array with the names of fields to be renamed as indexes
	* of the array. The value of each entry of the array should be set to
	* another associative array with the entry named name with the new
	* field name and the entry named Declaration that is expected to contain
	* the portion of the field declaration already in DBMS specific SQL code
	* as it is used in the CREATE TABLE statement.
	*
	* change
	*
	* Associative array with the names of the fields to be changed as indexes
	* of the array. Keep in mind that if it is intended to change either the
	* name of a field and any other properties, the change array entries
	* should have the new names of the fields as array indexes.
	*
	* The value of each entry of the array should be set to another associative
	* array with the properties of the fields to that are meant to be changed as
	* array entries. These entries should be assigned to the new values of the
	* respective properties. The properties of the fields should be the same
	* as defined by the Metabase parser.
	*
	* Example
	* array(
	* 'name' => 'userlist',
	* 'add' => array(
	* 'quota' => array(
	* 'type' => 'integer',
	* 'unsigned' => 1
	* )
	* ),
	* 'remove' => array(
	* 'file_limit' => array(),
	* 'time_limit' => array()
	* ),
	* 'change' => array(
	* 'gender' => array(
	* 'default' => 'M',
	* )
	* ),
	* 'rename' => array(
	* 'sex' => array(
	* 'name' => 'gender',
	* )
	* )
	* )
	*
	* @param boolean $check indicates whether the function should just check if the DBMS driver
	* can perform the requested table alterations if the value is true or
	* actually perform them otherwise.
	* @access public
	*
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	*/
	function alterTable($name, $changes, $check)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	foreach ($changes as $change_name => $change) {
	switch ($change_name) {
	case 'add':
	case 'remove':
	case 'change':
	case 'rename':
	case 'name':
	break;
	default:
	return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
	'alterTable: change type "'.$change_name.'" not yet supported');
	}
	}

	if ($check) {
	return MDB2_OK;
	}

	$query = (array_key_exists('name', $changes) ? 'RENAME AS '.$changes['name'] : '');

	if (array_key_exists('add', $changes)) {
	foreach ($changes['add'] as $field_name => $field) {
	$type_declaration = $db->getDeclaration($field['type'], $field_name, $field);
	if (PEAR::isError($type_declaration)) {
	return $err;
	}
	if ($query) {
	$query.= ', ';
	}
	$query.= 'ADD ' . $type_declaration;
	}
	}

	if (array_key_exists('remove', $changes)) {
	foreach ($changes['remove'] as $field_name => $field) {
	if ($query) {
	$query.= ', ';
	}
	$query.= 'DROP ' . $field_name;
	}
	}

	$rename = array();
	if (array_key_exists('rename', $changes)) {
	foreach ($changes['rename'] as $field_name => $field) {
	$rename[$field['name']] = $field_name;
	}
	}

	if (array_key_exists('change', $changes)) {
	foreach ($changes['change'] as $field_name => $field) {
	if ($query) {
	$query.= ', ';
	}
	if (isset($rename[$field_name])) {
	$old_field_name = $rename[$field_name];
	unset($rename[$field_name]);
	} else {
	$old_field_name = $field_name;
	}
	$query.= "CHANGE $field_name " . $db->getDeclaration($field['type'], $old_field_name, $field);
	}
	}

	if (!empty($rename)) {
	foreach ($rename as $rename_name => $renamed_field) {
	if ($query) {
	$query.= ', ';
	}
	$old_field_name = $renamed_field;
	$field = $changes['rename'][$old_field_name];
	$query.= 'CHANGE ' . $db->getDeclaration($field['type'], $old_field_name, $field);
	}
	}

	if (!$query) {
	return MDB2_OK;
	}

	return $db->query("ALTER TABLE $name $query");
	}

	// }}}
	// {{{ listDatabases()

	/**
	* list all databases
	*
	* @return mixed data array on success, a MDB2 error on failure
	* @access public
	*/
	function listDatabases()
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$databases = $db->queryCol('SHOW DATABASES');
	return $databases;
	}

	// }}}
	// {{{ listUsers()

	/**
	* list all users
	*
	* @return mixed data array on success, a MDB2 error on failure
	* @access public
	*/
	function listUsers()
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$users = $db->queryCol('SELECT DISTINCT USER FROM USER');
	return $users;
	}

	// }}}
	// {{{ listTables()

	/**
	* list all tables in the current database
	*
	* @return mixed data array on success, a MDB2 error on failure
	* @access public
	*/
	function listTables()
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$table_names = $db->queryCol('SHOW TABLES');
	if (PEAR::isError($table_names)) {
	return $table_names;
	}

	$tables = array();
	for ($i = 0, $j = count($table_names); $i < $j; ++$i) {
	if (!$this->_isSequenceName($table_names[$i]))
	$tables[] = $table_names[$i];
	}

	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
	$tables = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $tables);
	}

	return $tables;
	}

	// }}}
	// {{{ listTableFields()

	/**
	* list all fields in a tables in the current database
	*
	* @param string $table name of table that should be used in method
	* @return mixed data array on success, a MDB2 error on failure
	* @access public
	*/
	function listTableFields($table)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$fields = $db->queryCol("SHOW COLUMNS FROM $table");
	if (PEAR::isError($fields)) {
	return $fields;
	}

	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
	$fields = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $fields);
	}

	return $fields;
	}

	// }}}
	// {{{ createIndex()

	/**
	* get the stucture of a field into an array
	*
	* @param string $table name of the table on which the index is to be created
	* @param string $name name of the index to be created
	* @param array $definition associative array that defines properties of the index to be created.
	* Currently, only one property named FIELDS is supported. This property
	* is also an associative with the names of the index fields as array
	* indexes. Each entry of this array is set to another type of associative
	* array that specifies properties of the index that are specific to
	* each field.
	*
	* Currently, only the sorting property is supported. It should be used
	* to define the sorting direction of the index. It may be set to either
	* ascending or descending.
	*
	* Not all DBMS support index sorting direction configuration. The DBMS
	* drivers of those that do not support it ignore this property. Use the
	* function supports() to determine whether the DBMS driver can manage indexes.

	* Example
	* array(
	* 'fields' => array(
	* 'user_name' => array(
	* 'sorting' => 'ascending'
	* ),
	* 'last_login' => array()
	* )
	* )
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function createIndex($table, $name, $definition)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	if (array_key_exists('primary', $definition) && $definition['primary']) {
	$type = 'PRIMARY';
	$name = 'KEY';
	} elseif (array_key_exists('unique', $definition) && $definition['unique']) {
	$type = 'UNIQUE';
	} else {
	$type = 'INDEX';
	}

	$query = "ALTER TABLE $table ADD $type $name (";
	$query.= implode(', ', array_keys($definition['fields']));
	$query.= ')';

	return $db->query($query);
	}

	// }}}
	// {{{ dropIndex()

	/**
	* drop existing index
	*
	* @param string $table name of table that should be used in method
	* @param string $name name of the index to be dropped
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function dropIndex($table, $name)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	return $db->query("ALTER TABLE $table DROP INDEX $name");
	}

	// }}}
	// {{{ listTableIndexes()

	/**
	* list all indexes in a table
	*
	* @param string $table name of table that should be used in method
	* @return mixed data array on success, a MDB2 error on failure
	* @access public
	*/
	function listTableIndexes($table)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$key_name = 'Key_name';
	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
	if ($db->options['field_case'] == CASE_LOWER) {
	$key_name = strtolower($key_name);
	} else {
	$key_name = strtoupper($key_name);
	}
	}

	$query = "SHOW INDEX FROM $table";
	$indexes_all = $db->queryCol($query, 'text', $key_name);
	if (PEAR::isError($indexes_all)) {
	return $indexes_all;
	}

	$indexes = array_unique($indexes_all);

	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
	$indexes = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $indexes);
	}

	return $indexes;
	}

	// }}}
	// {{{ createSequence()

	/**
	* create sequence
	*
	* @param string $seq_name name of the sequence to be created
	* @param string $start start value of the sequence; default is 1
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function createSequence($seq_name, $start = 1)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$sequence_name = $db->getSequenceName($seq_name);
	$seqcol_name = $db->options['seqcol_name'];
	$result = $this->_verifyTableType($db->options['default_table_type']);
	if (PEAR::isError($result)) {
	return $result;
	}

	$res = $db->query("CREATE TABLE $sequence_name".
	"($seqcol_name INT NOT NULL AUTO_INCREMENT, PRIMARY KEY ($seqcol_name))".
	(strlen($db->options['default_table_type']) ? ' TYPE='.$db->options['default_table_type'] : '')
	);

	if (PEAR::isError($res)) {
	return $res;
	}

	if ($start == 1) {
	return MDB2_OK;
	}

	$res = $db->query("INSERT INTO $sequence_name ($seqcol_name) VALUES (".($start-1).')');
	if (!PEAR::isError($res)) {
	return MDB2_OK;
	}

	// Handle error
	$result = $db->query("DROP TABLE $sequence_name");
	if (PEAR::isError($result)) {
	return $db->raiseError(MDB2_ERROR, null, null,
	'createSequence: could not drop inconsistent sequence table ('.
	$result->getMessage().' ('.$result->getUserinfo().'))');
	}

	return $db->raiseError(MDB2_ERROR, null, null,
	'createSequence: could not create sequence table ('.
	$res->getMessage().' ('.$res->getUserinfo().'))');
	}

	// }}}
	// {{{ dropSequence()

	/**
	* drop existing sequence
	*
	* @param string $seq_name name of the sequence to be dropped
	* @return mixed MDB2_OK on success, a MDB2 error on failure
	* @access public
	*/
	function dropSequence($seq_name)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$sequence_name = $db->getSequenceName($seq_name);
	return $db->query("DROP TABLE $sequence_name");
	}

	// }}}
	// {{{ listSequences()

	/**
	* list all sequences in the current database
	*
	* @return mixed data array on success, a MDB2 error on failure
	* @access public
	*/
	function listSequences()
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$table_names = $db->queryCol('SHOW TABLES');
	if (PEAR::isError($table_names)) {
	return $table_names;
	}

	$sequences = array();
	for ($i = 0, $j = count($table_names); $i < $j; ++$i) {
	if ($sqn = $this->_isSequenceName($table_names[$i])) {
	$sequences[] = $sqn;
	}
	}

	return $sequences;
	}

	// }}}
	}
	?>

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