/lenasys/trunk : contents of codeigniter/system/database/drivers/sqlite/sqlite

: (revision 19.1.5)

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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * SQLite Forge Class
 *
 * @category	Database
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/database/
 */
class CI_DB_sqlite_forge extends CI_DB_forge {

	/**
	 * Create database
	 *
	 * @access	public
	 * @param	string	the database name
	 * @return	bool
	 */
	function _create_database()
	{
		// In SQLite, a database is created when you connect to the database.
		// We'll return TRUE so that an error isn't generated
		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Drop database
	 *
	 * @access	private
	 * @param	string	the database name
	 * @return	bool
	 */
	function _drop_database($name)
	{
		if ( ! @file_exists($this->db->database) OR ! @unlink($this->db->database))
		{
			if ($this->db->db_debug)
			{
				return $this->db->display_error('db_unable_to_drop');
			}
			return FALSE;
		}
		return TRUE;
	}
	// --------------------------------------------------------------------

	/**
	 * Create Table
	 *
	 * @access	private
	 * @param	string	the table name
	 * @param	array	the fields
	 * @param	mixed	primary key(s)
	 * @param	mixed	key(s)
	 * @param	boolean	should 'IF NOT EXISTS' be added to the SQL
	 * @return	bool
	 */
	function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
	{
		$sql = 'CREATE TABLE ';

		// IF NOT EXISTS added to SQLite in 3.3.0
		if ($if_not_exists === TRUE && version_compare($this->db->_version(), '3.3.0', '>=') === TRUE)
		{
			$sql .= 'IF NOT EXISTS ';
		}

		$sql .= $this->db->_escape_identifiers($table)."(";
		$current_field_count = 0;

		foreach ($fields as $field=>$attributes)
		{
			// Numeric field names aren't allowed in databases, so if the key is
			// numeric, we know it was assigned by PHP and the developer manually
			// entered the field information, so we'll simply add it to the list
			if (is_numeric($field))
			{
				$sql .= "\n\t$attributes";
			}
			else
			{
				$attributes = array_change_key_case($attributes, CASE_UPPER);

				$sql .= "\n\t".$this->db->_protect_identifiers($field);

				$sql .=  ' '.$attributes['TYPE'];

				if (array_key_exists('CONSTRAINT', $attributes))
				{
					$sql .= '('.$attributes['CONSTRAINT'].')';
				}

				if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
				{
					$sql .= ' UNSIGNED';
				}

				if (array_key_exists('DEFAULT', $attributes))
				{
					$sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
				}

				if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
				{
					$sql .= ' NULL';
				}
				else
				{
					$sql .= ' NOT NULL';
				}

				if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
				{
					$sql .= ' AUTO_INCREMENT';
				}
			}

			// don't add a comma on the end of the last field
			if (++$current_field_count < count($fields))
			{
				$sql .= ',';
			}
		}

		if (count($primary_keys) > 0)
		{
			$primary_keys = $this->db->_protect_identifiers($primary_keys);
			$sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
		}

		if (is_array($keys) && count($keys) > 0)
		{
			foreach ($keys as $key)
			{
				if (is_array($key))
				{
					$key = $this->db->_protect_identifiers($key);
				}
				else
				{
					$key = array($this->db->_protect_identifiers($key));
				}

				$sql .= ",\n\tUNIQUE (" . implode(', ', $key) . ")";
			}
		}

		$sql .= "\n)";

		return $sql;
	}

	// --------------------------------------------------------------------

	/**
	 * Drop Table
	 *
	 *  Unsupported feature in SQLite
	 *
	 * @access	private
	 * @return	bool
	 */
	function _drop_table($table)
	{
		if ($this->db->db_debug)
		{
			return $this->db->display_error('db_unsuported_feature');
		}
		return array();
	}

	// --------------------------------------------------------------------

	/**
	 * Alter table query
	 *
	 * Generates a platform-specific query so that a table can be altered
	 * Called by add_column(), drop_column(), and column_alter(),
	 *
	 * @access	private
	 * @param	string	the ALTER type (ADD, DROP, CHANGE)
	 * @param	string	the column name
	 * @param	string	the table name
	 * @param	string	the column definition
	 * @param	string	the default value
	 * @param	boolean	should 'NOT NULL' be added
	 * @param	string	the field after which we should add the new field
	 * @return	object
	 */
	function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
	{
		$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);

		// DROP has everything it needs now.
		if ($alter_type == 'DROP')
		{
			// SQLite does not support dropping columns
			// http://www.sqlite.org/omitted.html
			// http://www.sqlite.org/faq.html#q11
			return FALSE;
		}

		$sql .= " $column_definition";

		if ($default_value != '')
		{
			$sql .= " DEFAULT \"$default_value\"";
		}

		if ($null === NULL)
		{
			$sql .= ' NULL';
		}
		else
		{
			$sql .= ' NOT NULL';
		}

		if ($after_field != '')
		{
			$sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
		}

		return $sql;

	}

	// --------------------------------------------------------------------

	/**
	 * Rename a table
	 *
	 * Generates a platform-specific query so that a table can be renamed
	 *
	 * @access	private
	 * @param	string	the old table name
	 * @param	string	the new table name
	 * @return	string
	 */
	function _rename_table($table_name, $new_table_name)
	{
		$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
		return $sql;
	}
}

/* End of file sqlite_forge.php */
/* Location: ./system/database/drivers/sqlite/sqlite_forge.php */

20.1.1 by galaxyAbstractor * Added an simple admin panel to the codeviewer-cmssy stuff	1	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	2	/**
	3	* CodeIgniter
	4	*
	5	* An open source application development framework for PHP 5.1.6 or newer
	6	*
	7	* @package CodeIgniter
	8	* @author ExpressionEngine Dev Team
	9	* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
	10	* @license http://codeigniter.com/user_guide/license.html
	11	* @link http://codeigniter.com
	12	* @since Version 1.0
	13	* @filesource
	14	*/
	15
	16	// ------------------------------------------------------------------------
	17
	18	/**
	19	* SQLite Forge Class
	20	*
	21	* @category Database
	22	* @author ExpressionEngine Dev Team
	23	* @link http://codeigniter.com/user_guide/database/
	24	*/
	25	class CI_DB_sqlite_forge extends CI_DB_forge {
	26
	27	/**
	28	* Create database
	29	*
	30	* @access public
	31	* @param string the database name
	32	* @return bool
	33	*/
	34	function _create_database()
	35	{
	36	// In SQLite, a database is created when you connect to the database.
	37	// We'll return TRUE so that an error isn't generated
	38	return TRUE;
	39	}
	40
	41	// --------------------------------------------------------------------
	42
	43	/**
	44	* Drop database
	45	*
	46	* @access private
	47	* @param string the database name
	48	* @return bool
	49	*/
	50	function _drop_database($name)
	51	{
	52	if ( ! @file_exists($this->db->database) OR ! @unlink($this->db->database))
	53	{
	54	if ($this->db->db_debug)
	55	{
	56	return $this->db->display_error('db_unable_to_drop');
	57	}
	58	return FALSE;
	59	}
	60	return TRUE;
	61	}
	62	// --------------------------------------------------------------------
	63
	64	/**
65	* Create Table
66	*
67	* @access private
68	* @param string the table name
69	* @param array the fields
70	* @param mixed primary key(s)
71	* @param mixed key(s)
72	* @param boolean should 'IF NOT EXISTS' be added to the SQL
73	* @return bool
74	*/
75	function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
76	{
77	$sql = 'CREATE TABLE ';
78
79	// IF NOT EXISTS added to SQLite in 3.3.0
80	if ($if_not_exists === TRUE && version_compare($this->db->_version(), '3.3.0', '>=') === TRUE)
81	{
82	$sql .= 'IF NOT EXISTS ';
83	}
84
85	$sql .= $this->db->_escape_identifiers($table)."(";
86	$current_field_count = 0;
87
88	foreach ($fields as $field=>$attributes)
89	{
90	// Numeric field names aren't allowed in databases, so if the key is
91	// numeric, we know it was assigned by PHP and the developer manually
92	// entered the field information, so we'll simply add it to the list
93	if (is_numeric($field))
94	{
95	$sql .= "\n\t$attributes";
96	}
97	else
98	{
99	$attributes = array_change_key_case($attributes, CASE_UPPER);
100
101	$sql .= "\n\t".$this->db->_protect_identifiers($field);
102
103	$sql .= ' '.$attributes['TYPE'];
104
105	if (array_key_exists('CONSTRAINT', $attributes))
106	{
107	$sql .= '('.$attributes['CONSTRAINT'].')';
108	}
109
110	if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
111	{
112	$sql .= ' UNSIGNED';
113	}
114
115	if (array_key_exists('DEFAULT', $attributes))
116	{
117	$sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
118	}
119
120	if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
121	{
122	$sql .= ' NULL';
123	}
124	else
125	{
126	$sql .= ' NOT NULL';
127	}
128
129	if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
130	{
131	$sql .= ' AUTO_INCREMENT';
132	}
133	}
134
135	// don't add a comma on the end of the last field
136	if (++$current_field_count < count($fields))
137	{
138	$sql .= ',';
139	}
140	}
141
142	if (count($primary_keys) > 0)
143	{
144	$primary_keys = $this->db->_protect_identifiers($primary_keys);
145	$sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
146	}
147
148	if (is_array($keys) && count($keys) > 0)
149	{
150	foreach ($keys as $key)
151	{
152	if (is_array($key))
153	{
154	$key = $this->db->_protect_identifiers($key);
155	}
156	else
157	{
158	$key = array($this->db->_protect_identifiers($key));
159	}
160
161	$sql .= ",\n\tUNIQUE (" . implode(', ', $key) . ")";
162	}
163	}
164
165	$sql .= "\n)";
166
167	return $sql;
168	}
169
170	// --------------------------------------------------------------------
171
172	/**
173	* Drop Table
174	*
175	* Unsupported feature in SQLite
176	*
177	* @access private
178	* @return bool
179	*/
180	function _drop_table($table)
181	{
182	if ($this->db->db_debug)
183	{
184	return $this->db->display_error('db_unsuported_feature');
185	}
186	return array();
187	}
188
189	// --------------------------------------------------------------------
190
191	/**
192	* Alter table query
193	*
194	* Generates a platform-specific query so that a table can be altered
195	* Called by add_column(), drop_column(), and column_alter(),
196	*
197	* @access private
198	* @param string the ALTER type (ADD, DROP, CHANGE)
199	* @param string the column name
200	* @param string the table name
201	* @param string the column definition
202	* @param string the default value
203	* @param boolean should 'NOT NULL' be added
204	* @param string the field after which we should add the new field
205	* @return object
206	*/
207	function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
208	{
209	$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);
210
211	// DROP has everything it needs now.
212	if ($alter_type == 'DROP')
213	{
214	// SQLite does not support dropping columns
215	// http://www.sqlite.org/omitted.html
216	// http://www.sqlite.org/faq.html#q11
217	return FALSE;
218	}
219
220	$sql .= " $column_definition";
221
222	if ($default_value != '')
223	{
224	$sql .= " DEFAULT \"$default_value\"";
225	}
226
227	if ($null === NULL)
228	{
229	$sql .= ' NULL';
230	}
231	else
232	{
233	$sql .= ' NOT NULL';
234	}
235
236	if ($after_field != '')
237	{
238	$sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
239	}
240
241	return $sql;
242
243	}
244
245	// --------------------------------------------------------------------
246
247	/**
248	* Rename a table
249	*
250	* Generates a platform-specific query so that a table can be renamed
251	*
252	* @access private
253	* @param string the old table name
254	* @param string the new table name
255	* @return string
256	*/
257	function _rename_table($table_name, $new_table_name)
258	{
259	$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
260	return $sql;
261	}
262	}
263
264	/* End of file sqlite_forge.php */
265	/* Location: ./system/database/drivers/sqlite/sqlite_forge.php */