Merge pull request #42 from CUBRID/develop

CUBRID Database Driver for CI.

1 files changed, 288 insertions, 0 deletions

diff --git a/system/database/drivers/cubrid/cubrid_forge.php b/system/database/drivers/cubrid/cubrid_forge.php
new file mode 100644
index 000000000..bab03f748
--- /dev/null
+++ b/system/database/drivers/cubrid/cubrid_forge.php
@@ -0,0 +1,288 @@
+<?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		Esen Sagynov
+ * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CUBRID Forge Class
+ *
+ * @category	Database
+ * @author		Esen Sagynov
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_cubrid_forge extends CI_DB_forge {
+
+	/**
+	 * Create database
+	 *
+	 * @access	private
+	 * @param	string	the database name
+	 * @return	bool
+	 */
+	function _create_database($name)
+	{
+		// CUBRID does not allow to create a database in SQL. The GUI tools
+		// have to be used for this purpose.
+		return FALSE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Drop database
+	 *
+	 * @access	private
+	 * @param	string	the database name
+	 * @return	bool
+	 */
+	function _drop_database($name)
+	{
+		// CUBRID does not allow to drop a database in SQL. The GUI tools
+		// have to be used for this purpose.
+		return FALSE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Process Fields
+	 *
+	 * @access	private
+	 * @param	mixed	the fields
+	 * @return	string
+	 */
+	function _process_fields($fields)
+	{
+		$current_field_count = 0;
+		$sql = '';
+
+		foreach ($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) . "\"";
+
+				if (array_key_exists('NAME', $attributes))
+				{
+					$sql .= ' '.$this->db->_protect_identifiers($attributes['NAME']).' ';
+				}
+
+				if (array_key_exists('TYPE', $attributes))
+				{
+					$sql .= ' '.$attributes['TYPE'];
+
+					if (array_key_exists('CONSTRAINT', $attributes))
+					{
+						switch ($attributes['TYPE'])
+						{
+							case 'decimal':
+							case 'float':
+							case 'numeric':
+								$sql .= '('.implode(',', $attributes['CONSTRAINT']).')';
+								break;
+							case 'enum': 	// As of version 8.4.0 CUBRID does not support
+											// enum data type.
+											break;
+							case 'set':
+								$sql .= '("'.implode('","', $attributes['CONSTRAINT']).'")';
+								break;
+							default:
+								$sql .= '('.$attributes['CONSTRAINT'].')';
+						}
+					}
+				}
+
+				if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
+				{
+					//$sql .= ' UNSIGNED';
+					// As of version 8.4.0 CUBRID does not support UNSIGNED INTEGER data type.
+					// Will be supported in the next release as a part of MySQL Compatibility.
+				}
+
+				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';
+				}
+
+				if (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE)
+				{
+					$sql .= ' UNIQUE';
+				}
+			}
+
+			// don't add a comma on the end of the last field
+			if (++$current_field_count < count($fields))
+			{
+				$sql .= ',';
+			}
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Create Table
+	 *
+	 * @access	private
+	 * @param	string	the table name
+	 * @param	mixed	the fields
+	 * @param	mixed	primary key(s)
+	 * @param	mixed	key(s)
+	 * @param	boolean	should 'IF NOT EXISTS' be added to the SQL
+	 * @return	bool
+	 */
+	function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
+	{
+		$sql = 'CREATE TABLE ';
+
+		if ($if_not_exists === TRUE)
+		{
+			//$sql .= 'IF NOT EXISTS ';
+			// As of version 8.4.0 CUBRID does not support this SQL syntax.
+		}
+
+		$sql .= $this->db->_escape_identifiers($table)." (";
+
+		$sql .= $this->_process_fields($fields);
+
+		// If there is a PK defined
+		if (count($primary_keys) > 0)
+		{
+			$key_name = "pk_" . $table . "_" .
+				$this->db->_protect_identifiers(implode('_', $primary_keys));
+			
+			$primary_keys = $this->db->_protect_identifiers($primary_keys);
+			$sql .= ",\n\tCONSTRAINT " . $key_name . " PRIMARY KEY(" . implode(', ', $primary_keys) . ")";
+		}
+
+		if (is_array($keys) && count($keys) > 0)
+		{
+			foreach ($keys as $key)
+			{
+				if (is_array($key))
+				{
+					$key_name = $this->db->_protect_identifiers(implode('_', $key));
+					$key = $this->db->_protect_identifiers($key);
+				}
+				else
+				{
+					$key_name = $this->db->_protect_identifiers($key);
+					$key = array($key_name);
+				}
+				
+				$sql .= ",\n\tKEY \"{$key_name}\" (" . implode(', ', $key) . ")";
+			}
+		}
+
+		$sql .= "\n);";
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Drop Table
+	 *
+	 * @access	private
+	 * @return	string
+	 */
+	function _drop_table($table)
+	{
+		return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * 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	array	fields
+	 * @param	string	the field after which we should add the new field
+	 * @return	object
+	 */
+	function _alter_table($alter_type, $table, $fields, $after_field = '')
+	{
+		$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ";
+
+		// DROP has everything it needs now.
+		if ($alter_type == 'DROP')
+		{
+			return $sql.$this->db->_protect_identifiers($fields);
+		}
+
+		$sql .= $this->_process_fields($fields);
+
+		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)
+	{
+		$sql = 'RENAME TABLE '.$this->db->_protect_identifiers($table_name)." AS ".$this->db->_protect_identifiers($new_table_name);
+		return $sql;
+	}
+
+}
+
+/* End of file cubrid_forge.php */
+/* Location: ./system/database/drivers/cubrid/cubrid_forge.php */
\ No newline at end of file