diff options
| author | Derek Allard <derek.allard@ellislab.com> | 2008-01-16 22:10:09 +0100 |
|---|---|---|
| committer | Derek Allard <derek.allard@ellislab.com> | 2008-01-16 22:10:09 +0100 |
| commit | 39b622db9bda38282a32bb45623da63efe685729 (patch) | |
| tree | 0d1a1729dc544ebfd1d3dfb11b2ff78759bcf7be /system/database/drivers/mysql/mysql_forge.php | |
| parent | f4615fec22671262e95d3a852f8b9088314118f2 (diff) | |
Many new Active Record functions, and another whack of stuff
Diffstat (limited to 'system/database/drivers/mysql/mysql_forge.php')
| -rw-r--r-- | system/database/drivers/mysql/mysql_forge.php | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/system/database/drivers/mysql/mysql_forge.php b/system/database/drivers/mysql/mysql_forge.php new file mode 100644 index 000000000..8a918c026 --- /dev/null +++ b/system/database/drivers/mysql/mysql_forge.php @@ -0,0 +1,223 @@ +<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package CodeIgniter
+ * @author Rick Ellis
+ * @copyright Copyright (c) 2006, EllisLab, Inc.
+ * @license http://www.codeigniter.com/user_guide/license.html
+ * @link http://www.codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * MySQL Forge Class
+ *
+ * @category Database
+ * @author Rick Ellis
+ * @link http://www.codeigniter.com/user_guide/database/
+ */
+class CI_DB_mysql_forge extends CI_DB_forge {
+
+ /**
+ * Create database
+ *
+ * @access private
+ * @param string the database name
+ * @return bool
+ */
+ function _create_database($name)
+ {
+ return "CREATE DATABASE ".$name;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Drop database
+ *
+ * @access private
+ * @param string the database name
+ * @return bool
+ */
+ function _drop_database($name)
+ {
+ return "DROP DATABASE ".$name;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * 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))
+ {
+ $sql .= '('.$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))
+ {
+ $sql .= ($attributes['NULL'] === TRUE) ? ' NULL' : ' 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 .= ',';
+ }
+ }
+
+ 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 ';
+ }
+
+ $sql .= $this->db->_escape_table($table)." (";
+
+ $sql .= $this->_process_fields($fields);
+
+ 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)
+ {
+ $keys = $this->db->_protect_identifiers($keys);
+ foreach ($keys as $key)
+ {
+ $sql .= ",\n\tKEY ($key)";
+ }
+ }
+
+ $sql .= "\n) DEFAULT CHARACTER SET {$this->db->char_set} COLLATE {$this->db->dbcollat};";
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Drop Table
+ *
+ * @access private
+ * @return bool
+ */
+ function _drop_table($table)
+ {
+ return "DROP TABLE IF EXISTS ".$this->db->_escape_table($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;
+ }
+
+}
+?>
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