oci8.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 oci8 driver for the management modules
	*
	* @package MDB2
	* @category Database
	* @author Lukas Smith <smith@pooteeweet.org>
	*/
	class MDB2_Driver_Manager_oci8 extends MDB2_Driver_Manager_Common
	{
	// {{{ createDatabase()

	/**
	* create a new database
	*
	* @param object $db database object that is extended by this class
	* @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;
	}

	$username = $db->options['database_name_prefix'].$name;
	$password = $db->dsn['password'] ? $db->dsn['password'] : $name;
	$tablespace = $db->options['default_tablespace']
	? ' DEFAULT TABLESPACE '.$db->options['default_tablespace'] : '';

	$query = 'CREATE USER '.$username.' IDENTIFIED BY '.$password.$tablespace;
	$result = $db->standaloneQuery($query);
	if (PEAR::isError($result)) {
	return $result;
	}
	$query = 'GRANT CREATE SESSION, CREATE TABLE, UNLIMITED TABLESPACE, CREATE SEQUENCE TO '.$username;
	$result = $db->standaloneQuery($query);
	if (PEAR::isError($result)) {
	$query = 'DROP USER '.$username.' CASCADE';
	$result2 = $db->standaloneQuery($query);
	if (PEAR::isError($result2)) {
	return $db->raiseError(MDB2_ERROR, null, null,
	'createDatabase: could not setup the database user ('.$result->getUserinfo().
	') and then could drop its records ('.$result2->getUserinfo().')');
	}
	return $result;
	}
	return MDB2_OK;
	}

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

	/**
	* drop an existing database
	*
	* @param object $db database object that is extended by this class
	* @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;
	}

	$username = $db->options['database_name_prefix'].$name;
	return $db->standaloneQuery('DROP USER '.$username.' CASCADE');
	}

	function _makeAutoincrement($name, $table, $start = 1)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$index_name = $table . '_autoincrement_pk';
	$definition = array(
	'primary' => true,
	'fields' => array($name),
	);
	$result = $db->manager->createIndex($table, $index_name, $definition);
	if (PEAR::isError($result)) {
	return $db->raiseError(MDB2_ERROR, null, null,
	'_makeAutoincrement: primary key for autoincrement PK could not be created');
	}

	$result = $db->manager->createSequence($table, $start);
	if (PEAR::isError($result)) {
	return $db->raiseError(MDB2_ERROR, null, null,
	'_makeAutoincrement: sequence for autoincrement PK could not be created');
	}

	$sequence_name = $db->getSequenceName($table);
	$trigger_name = $table . '_autoincrement_pk';
	$trigger_sql = "CREATE TRIGGER $trigger_name BEFORE INSERT ON $table";
	$trigger_sql.= " FOR EACH ROW BEGIN IF (:new.$name IS NULL) THEN SELECT ";
	$trigger_sql.= "$sequence_name.NEXTVAL INTO :new.$name FROM DUAL; END IF; END;";

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

	function _dropAutoincrement($name, $table)
	{
	$db =& $this->getDBInstance();
	if (PEAR::isError($db)) {
	return $db;
	}

	$result = $db->manager->dropSequence($table);
	if (PEAR::isError($result)) {
	return $db->raiseError(MDB2_ERROR, null, null,
	'_dropAutoincrement: sequence for autoincrement PK could not be dropped');
	}

	$sequence_name = $db->getSequenceName($table);
	$trigger_name = $table . '_autoincrement_pk';
	$trigger_sql = 'DROP TRIGGER ' . $trigger_name;

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

	// }}}
	// {{{ 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)
	{
	$result = parent::createTable($name, $fields);
	if (PEAR::isError($result)) {
	return $result;
	}
	foreach($fields as $field_name => $field) {
	if (array_key_exists('autoincrement', $field) && $field['autoincrement']) {
	return $this->_makeAutoincrement($field_name, $name);
	}
	}
	}

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

	/**
	* alter an existing table
	*
	* @param object $db database object that is extended by this class
	* @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 'name':
	break;
	case 'rename':
	default:
	return $db->raiseError(MDB2_ERROR, null, null,
	'alterTable: change type "'.$change_name.'" not yet supported');
	}
	}

	if ($check) {
	return MDB2_OK;
	}

	if (array_key_exists('remove', $changes)) {
	$query = ' DROP (';
	$fields = $changes['remove'];
	$query.= implode(', ', array_keys($fields));
	$query.= ')';
	if (PEAR::isError($result = $db->query("ALTER TABLE $name $query"))) {
	return $result;
	}
	$query = '';
	}

	$query = (array_key_exists('name', $changes) ? 'RENAME TO '.$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;
	}
	$query.= ' ADD (' . $type_declaration . ')';
	}
	}

	if (array_key_exists('change', $changes)) {
	foreach ($changes['change'] as $field_name => $field) {
	$query.= "MODIFY ($field_name " . $db->getDeclaration($field['type'], $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;
	}

	if ($db->options['database_name_prefix']) {
	$query = 'SELECT SUBSTR(username, '
	.(strlen($db->options['database_name_prefix'])+1)
	.") FROM sys.dba_users WHERE username LIKE '"
	.$db->options['database_name_prefix']."%'";
	} else {
	$query = 'SELECT username FROM sys.dba_users';
	}
	$result = $db->standaloneQuery($query);
	if (PEAR::isError($result)) {
	return $result;
	}
	$databases = $result->fetchCol();
	if (PEAR::isError($databases)) {
	return $databases;
	}
	// is it legit to force this to lowercase?
	$databases = array_keys(array_change_key_case(array_flip($databases), $db->options['field_case']));
	$result->free();
	return $databases;
	}

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

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

	$query = 'SELECT username FROM sys.all_users';
	$users = $db->queryCol($query);
	if (PEAR::isError($users)) {
	return $users;
	}
	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
	&& $db->options['field_case'] == CASE_LOWER
	) {
	$users = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $users);
	}
	return $users;
	}
	// }}}
	// {{{ listViews()

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

	$query = 'SELECT view_name FROM sys.user_views';
	$views = $db->queryCol($query);
	if (PEAR::isError($views)) {
	return $views;
	}
	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
	&& $db->options['field_case'] == CASE_LOWER
	) {
	$views = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $views);
	}
	return $views;
	}

	// }}}
	// {{{ listFunctions()

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

	$query = "SELECT name FROM sys.user_source WHERE line = 1 AND type = 'FUNCTION'";
	$functions = $db->queryCol($query);
	if (PEAR::isError($functions)) {
	return $functions;
	}
	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
	&& $db->options['field_case'] == CASE_LOWER
	) {
	$functions = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $functions);
	}
	return $functions;
	}

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

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

	$query = 'SELECT table_name FROM sys.user_tables';
	return $db->queryCol($query);
	}

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

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

	$table = strtoupper($table);
	$query = "SELECT column_name FROM user_tab_columns WHERE table_name='$table' ORDER BY column_id";
	$fields = $db->queryCol($query);
	if (PEAR::isError($result)) {
	return $result;
	}
	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
	&& $db->options['field_case'] == CASE_LOWER
	) {
	$fields = array_map(($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']) {
	$query = "ALTER TABLE $table ADD CONSTRAINT $name PRIMARY KEY (";
	} else {
	$query = 'CREATE';
	if (array_key_exists('unique', $definition) && $definition['unique']) {
	$query.= ' UNIQUE';
	}
	$query .= " INDEX $name ON $table (";
	}
	$query .= implode(', ', array_keys($definition['fields'])) . ')';

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

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

	/**
	* create sequence
	*
	* @param object $db database object that is extended by this class
	* @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);
	return $db->query("CREATE SEQUENCE $sequence_name START WITH $start INCREMENT BY 1".
	($start < 1 ? " MINVALUE $start" : ''));
	}

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

	/**
	* drop existing sequence
	*
	* @param object $db database object that is extended by this class
	* @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 SEQUENCE $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;
	}

	$query = "SELECT sequence_name FROM sys.user_sequences";
	$table_names = $db->queryCol($query);
	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[] = $sqn;
	}
	if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
	&& $db->options['field_case'] == CASE_LOWER
	) {
	$sequences = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $sequences);
	}
	return $sequences;
	}}
	?>

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