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/halogy/database/drivers/postgre/postgre_forge.php

https://bitbucket.org/haloweb/halogy-1.0/
PHP | 248 lines | 119 code | 39 blank | 90 comment | 23 complexity | 5704869ec9d1592562688ad7c243311c MD5 | raw file
  1<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
  2/**
  3 * CodeIgniter
  4 *
  5 * An open source application development framework for PHP 4.3.2 or newer
  6 *
  7 * @package		CodeIgniter
  8 * @author		ExpressionEngine Dev Team
  9 * @copyright	Copyright (c) 2008 - 2009, 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 * Postgre Forge Class
 20 *
 21 * @category	Database
 22 * @author		ExpressionEngine Dev Team
 23 * @link		http://codeigniter.com/user_guide/database/
 24 */
 25class CI_DB_postgre_forge extends CI_DB_forge {
 26
 27	/**
 28	 * Create database
 29	 *
 30	 * @access	private
 31	 * @param	string	the database name
 32	 * @return	bool
 33	 */
 34	function _create_database($name)
 35	{
 36		return "CREATE DATABASE ".$name;
 37	}
 38
 39	// --------------------------------------------------------------------
 40
 41	/**
 42	 * Drop database
 43	 *
 44	 * @access	private
 45	 * @param	string	the database name
 46	 * @return	bool
 47	 */
 48	function _drop_database($name)
 49	{
 50		return "DROP DATABASE ".$name;
 51	}
 52
 53	// --------------------------------------------------------------------
 54
 55	/**
 56	 * Create Table
 57	 *
 58	 * @access	private
 59	 * @param	string	the table name
 60	 * @param	array	the fields
 61	 * @param	mixed	primary key(s)
 62	 * @param	mixed	key(s)
 63	 * @param	boolean	should 'IF NOT EXISTS' be added to the SQL
 64	 * @return	bool
 65	 */
 66	function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
 67	{
 68		$sql = 'CREATE TABLE ';
 69		
 70		if ($if_not_exists === TRUE)
 71		{
 72			$sql .= 'IF NOT EXISTS ';
 73		}
 74		
 75		$sql .= $this->db->_escape_identifiers($table)." (";
 76		$current_field_count = 0;
 77
 78		foreach ($fields as $field=>$attributes)
 79		{
 80			// Numeric field names aren't allowed in databases, so if the key is
 81			// numeric, we know it was assigned by PHP and the developer manually
 82			// entered the field information, so we'll simply add it to the list
 83			if (is_numeric($field))
 84			{
 85				$sql .= "\n\t$attributes";
 86			}
 87			else
 88			{
 89				$attributes = array_change_key_case($attributes, CASE_UPPER);
 90				
 91				$sql .= "\n\t".$this->db->_protect_identifiers($field);
 92				
 93				$sql .=  ' '.$attributes['TYPE'];
 94	
 95				if (array_key_exists('CONSTRAINT', $attributes))
 96				{
 97					$sql .= '('.$attributes['CONSTRAINT'].')';
 98				}
 99	
100				if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
101				{
102					$sql .= ' UNSIGNED';
103				}
104	
105				if (array_key_exists('DEFAULT', $attributes))
106				{
107					$sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
108				}
109	
110				if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
111				{
112					$sql .= ' NULL';
113				}
114				else
115				{
116					$sql .= ' NOT NULL';			
117				}
118	
119				if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
120				{
121					$sql .= ' AUTO_INCREMENT';
122				}
123			}
124			
125			// don't add a comma on the end of the last field
126			if (++$current_field_count < count($fields))
127			{
128				$sql .= ',';
129			}
130		}
131
132		if (count($primary_keys) > 0)
133		{
134			$primary_keys = $this->db->_protect_identifiers($primary_keys);
135			$sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
136		}
137		
138		if (is_array($keys) && count($keys) > 0)
139		{
140			foreach ($keys as $key)
141			{
142				if (is_array($key))
143				{
144					$key = $this->db->_protect_identifiers($key);	
145				}
146				else
147				{
148					$key = array($this->db->_protect_identifiers($key));
149				}
150				
151				$sql .= ",\n\tFOREIGN KEY (" . implode(', ', $key) . ")";
152			}
153		}
154
155		$sql .= "\n);";
156
157		return $sql;
158	}
159
160	// --------------------------------------------------------------------
161
162	/**
163	 * Drop Table
164	 *
165	 * @access	private
166	 * @return	bool
167	 */
168	function _drop_table($table)
169	{
170		return "DROP TABLE ".$this->db->_escape_identifiers($table)." CASCADE";
171	}
172
173	// --------------------------------------------------------------------
174
175	/**
176	 * Alter table query
177	 *
178	 * Generates a platform-specific query so that a table can be altered
179	 * Called by add_column(), drop_column(), and column_alter(),
180	 *
181	 * @access	private
182	 * @param	string	the ALTER type (ADD, DROP, CHANGE)
183	 * @param	string	the column name
184	 * @param	string	the table name
185	 * @param	string	the column definition
186	 * @param	string	the default value
187	 * @param	boolean	should 'NOT NULL' be added
188	 * @param	string	the field after which we should add the new field
189	 * @return	object
190	 */
191	function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
192	{
193		$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);
194
195		// DROP has everything it needs now.
196		if ($alter_type == 'DROP')
197		{
198			return $sql;
199		}
200
201		$sql .= " $column_definition";
202
203		if ($default_value != '')
204		{
205			$sql .= " DEFAULT \"$default_value\"";
206		}
207
208		if ($null === NULL)
209		{
210			$sql .= ' NULL';
211		}
212		else
213		{
214			$sql .= ' NOT NULL';
215		}
216
217		if ($after_field != '')
218		{
219			$sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
220		}
221		
222		return $sql;
223		
224	}
225
226	// --------------------------------------------------------------------
227
228	/**
229	 * Rename a table
230	 *
231	 * Generates a platform-specific query so that a table can be renamed
232	 *
233	 * @access	private
234	 * @param	string	the old table name
235	 * @param	string	the new table name
236	 * @return	string
237	 */
238	function _rename_table($table_name, $new_table_name)
239	{
240		$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
241		return $sql;
242	}
243
244
245}
246
247/* End of file postgre_forge.php */
248/* Location: ./system/database/drivers/postgre/postgre_forge.php */