summaryrefslogtreecommitdiffstats
path: root/system/database/DB_forge.php
diff options
context:
space:
mode:
authorFlorian Pritz <bluewind@xinu.at>2017-09-26 13:46:14 +0200
committerFlorian Pritz <bluewind@xinu.at>2017-09-26 13:46:14 +0200
commit3ff6ffa3341c876b741feb66552cdd110b67872e (patch)
tree69e11cd0009ddd1346f2dc4cd8c47244368db28e /system/database/DB_forge.php
parentbc2f7f596f727e204e8b8c5b849545745b3cbfaa (diff)
parent81a4c8c630ef59cffea0c24e64fb6fa7f09bfcf6 (diff)
Merge CodeIgniter 3 support
Diffstat (limited to 'system/database/DB_forge.php')
-rw-r--r--system/database/DB_forge.php950
1 files changed, 800 insertions, 150 deletions
diff --git a/system/database/DB_forge.php b/system/database/DB_forge.php
index b92069bbc..3cb02ca4e 100644
--- a/system/database/DB_forge.php
+++ b/system/database/DB_forge.php
@@ -1,46 +1,173 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
- * Code Igniter
+ * CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
*
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 1.0.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
- * Database Utility Class
+ * Database Forge Class
*
* @category Database
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/database/
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
*/
-class CI_DB_forge {
+abstract class CI_DB_forge {
+
+ /**
+ * Database object
+ *
+ * @var object
+ */
+ protected $db;
+
+ /**
+ * Fields data
+ *
+ * @var array
+ */
+ public $fields = array();
+
+ /**
+ * Keys data
+ *
+ * @var array
+ */
+ public $keys = array();
+
+ /**
+ * Primary Keys data
+ *
+ * @var array
+ */
+ public $primary_keys = array();
+
+ /**
+ * Database character set
+ *
+ * @var string
+ */
+ public $db_char_set = '';
- var $fields = array();
- var $keys = array();
- var $primary_keys = array();
- var $db_char_set = '';
+ // --------------------------------------------------------------------
+
+ /**
+ * CREATE DATABASE statement
+ *
+ * @var string
+ */
+ protected $_create_database = 'CREATE DATABASE %s';
+
+ /**
+ * DROP DATABASE statement
+ *
+ * @var string
+ */
+ protected $_drop_database = 'DROP DATABASE %s';
+
+ /**
+ * CREATE TABLE statement
+ *
+ * @var string
+ */
+ protected $_create_table = "%s %s (%s\n)";
/**
- * Constructor
+ * CREATE TABLE IF statement
*
- * Grabs the CI super object instance so we can access it.
+ * @var string
+ */
+ protected $_create_table_if = 'CREATE TABLE IF NOT EXISTS';
+
+ /**
+ * CREATE TABLE keys flag
+ *
+ * Whether table keys are created from within the
+ * CREATE TABLE statement.
*
+ * @var bool
*/
- function __construct()
+ protected $_create_table_keys = FALSE;
+
+ /**
+ * DROP TABLE IF EXISTS statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = 'DROP TABLE IF EXISTS';
+
+ /**
+ * RENAME TABLE statement
+ *
+ * @var string
+ */
+ protected $_rename_table = 'ALTER TABLE %s RENAME TO %s;';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var bool|array
+ */
+ protected $_unsigned = TRUE;
+
+ /**
+ * NULL value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_null = '';
+
+ /**
+ * DEFAULT value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_default = ' DEFAULT ';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * @param object &$db Database object
+ * @return void
+ */
+ public function __construct(&$db)
{
- // Assign the main database object to $this->db
- $CI =& get_instance();
- $this->db =& $CI->db;
- log_message('debug', "Database Forge Class Initialized");
+ $this->db =& $db;
+ log_message('info', 'Database Forge Class Initialized');
}
// --------------------------------------------------------------------
@@ -48,20 +175,26 @@ class CI_DB_forge {
/**
* Create database
*
- * @access public
- * @param string the database name
+ * @param string $db_name
* @return bool
*/
- function create_database($db_name)
+ public function create_database($db_name)
{
- $sql = $this->_create_database($db_name);
+ if ($this->_create_database === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
+ }
+ elseif ( ! $this->db->query(sprintf($this->_create_database, $this->db->escape_identifiers($db_name), $this->db->char_set, $this->db->dbcollat)))
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
+ }
- if (is_bool($sql))
+ if ( ! empty($this->db->data_cache['db_names']))
{
- return $sql;
+ $this->db->data_cache['db_names'][] = $db_name;
}
- return $this->db->query($sql);
+ return TRUE;
}
// --------------------------------------------------------------------
@@ -69,20 +202,30 @@ class CI_DB_forge {
/**
* Drop database
*
- * @access public
- * @param string the database name
+ * @param string $db_name
* @return bool
*/
- function drop_database($db_name)
+ public function drop_database($db_name)
{
- $sql = $this->_drop_database($db_name);
+ if ($this->_drop_database === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
+ }
+ elseif ( ! $this->db->query(sprintf($this->_drop_database, $this->db->escape_identifiers($db_name))))
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
+ }
- if (is_bool($sql))
+ if ( ! empty($this->db->data_cache['db_names']))
{
- return $sql;
+ $key = array_search(strtolower($db_name), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
+ if ($key !== FALSE)
+ {
+ unset($this->db->data_cache['db_names'][$key]);
+ }
}
- return $this->db->query($sql);
+ return TRUE;
}
// --------------------------------------------------------------------
@@ -90,26 +233,26 @@ class CI_DB_forge {
/**
* Add Key
*
- * @access public
- * @param string key
- * @param string type
- * @return void
+ * @param string $key
+ * @param bool $primary
+ * @return CI_DB_forge
*/
- function add_key($key = '', $primary = FALSE)
+ public function add_key($key, $primary = FALSE)
{
- if (is_array($key))
+ // DO NOT change this! This condition is only applicable
+ // for PRIMARY keys because you can only have one such,
+ // and therefore all fields you add to it will be included
+ // in the same, composite PRIMARY KEY.
+ //
+ // It's not the same for regular indexes.
+ if ($primary === TRUE && is_array($key))
{
foreach ($key as $one)
{
$this->add_key($one, $primary);
}
- return;
- }
-
- if ($key == '')
- {
- show_error('Key information is required for that operation.');
+ return $this;
}
if ($primary === TRUE)
@@ -120,6 +263,8 @@ class CI_DB_forge {
{
$this->keys[] = $key;
}
+
+ return $this;
}
// --------------------------------------------------------------------
@@ -127,28 +272,22 @@ class CI_DB_forge {
/**
* Add Field
*
- * @access public
- * @param string collation
- * @return void
+ * @param array $field
+ * @return CI_DB_forge
*/
- function add_field($field = '')
+ public function add_field($field)
{
- if ($field == '')
- {
- show_error('Field information is required.');
- }
-
if (is_string($field))
{
- if ($field == 'id')
+ if ($field === 'id')
{
$this->add_field(array(
- 'id' => array(
- 'type' => 'INT',
- 'constraint' => 9,
- 'auto_increment' => TRUE
- )
- ));
+ 'id' => array(
+ 'type' => 'INT',
+ 'constraint' => 9,
+ 'auto_increment' => TRUE
+ )
+ ));
$this->add_key('id', TRUE);
}
else
@@ -167,6 +306,7 @@ class CI_DB_forge {
$this->fields = array_merge($this->fields, $field);
}
+ return $this;
}
// --------------------------------------------------------------------
@@ -174,26 +314,133 @@ class CI_DB_forge {
/**
* Create Table
*
- * @access public
- * @param string the table name
+ * @param string $table Table name
+ * @param bool $if_not_exists Whether to add IF NOT EXISTS condition
+ * @param array $attributes Associative array of table attributes
* @return bool
*/
- function create_table($table = '', $if_not_exists = FALSE)
+ public function create_table($table, $if_not_exists = FALSE, array $attributes = array())
{
- if ($table == '')
+ if ($table === '')
{
show_error('A table name is required for that operation.');
}
+ else
+ {
+ $table = $this->db->dbprefix.$table;
+ }
- if (count($this->fields) == 0)
+ if (count($this->fields) === 0)
{
show_error('Field information is required.');
}
- $sql = $this->_create_table($this->db->dbprefix.$table, $this->fields, $this->primary_keys, $this->keys, $if_not_exists);
+ $sql = $this->_create_table($table, $if_not_exists, $attributes);
+
+ if (is_bool($sql))
+ {
+ $this->_reset();
+ if ($sql === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
+ }
+ }
+
+ if (($result = $this->db->query($sql)) !== FALSE)
+ {
+ isset($this->db->data_cache['table_names']) && $this->db->data_cache['table_names'][] = $table;
+
+ // Most databases don't support creating indexes from within the CREATE TABLE statement
+ if ( ! empty($this->keys))
+ {
+ for ($i = 0, $sqls = $this->_process_indexes($table), $c = count($sqls); $i < $c; $i++)
+ {
+ $this->db->query($sqls[$i]);
+ }
+ }
+ }
$this->_reset();
- return $this->db->query($sql);
+ return $result;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Create Table
+ *
+ * @param string $table Table name
+ * @param bool $if_not_exists Whether to add 'IF NOT EXISTS' condition
+ * @param array $attributes Associative array of table attributes
+ * @return mixed
+ */
+ protected function _create_table($table, $if_not_exists, $attributes)
+ {
+ if ($if_not_exists === TRUE && $this->_create_table_if === FALSE)
+ {
+ if ($this->db->table_exists($table))
+ {
+ return TRUE;
+ }
+ else
+ {
+ $if_not_exists = FALSE;
+ }
+ }
+
+ $sql = ($if_not_exists)
+ ? sprintf($this->_create_table_if, $this->db->escape_identifiers($table))
+ : 'CREATE TABLE';
+
+ $columns = $this->_process_fields(TRUE);
+ for ($i = 0, $c = count($columns); $i < $c; $i++)
+ {
+ $columns[$i] = ($columns[$i]['_literal'] !== FALSE)
+ ? "\n\t".$columns[$i]['_literal']
+ : "\n\t".$this->_process_column($columns[$i]);
+ }
+
+ $columns = implode(',', $columns)
+ .$this->_process_primary_keys($table);
+
+ // Are indexes created from within the CREATE TABLE statement? (e.g. in MySQL)
+ if ($this->_create_table_keys === TRUE)
+ {
+ $columns .= $this->_process_indexes($table);
+ }
+
+ // _create_table will usually have the following format: "%s %s (%s\n)"
+ $sql = sprintf($this->_create_table.'%s',
+ $sql,
+ $this->db->escape_identifiers($table),
+ $columns,
+ $this->_create_table_attr($attributes)
+ );
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * CREATE TABLE attributes
+ *
+ * @param array $attributes Associative array of table attributes
+ * @return string
+ */
+ protected function _create_table_attr($attributes)
+ {
+ $sql = '';
+
+ foreach (array_keys($attributes) as $key)
+ {
+ if (is_string($key))
+ {
+ $sql .= ' '.strtoupper($key).' '.$attributes[$key];
+ }
+ }
+
+ return $sql;
}
// --------------------------------------------------------------------
@@ -201,85 +448,151 @@ class CI_DB_forge {
/**
* Drop Table
*
- * @access public
- * @param string the table name
+ * @param string $table_name Table name
+ * @param bool $if_exists Whether to add an IF EXISTS condition
* @return bool
*/
- function drop_table($table_name)
+ public function drop_table($table_name, $if_exists = FALSE)
{
- $sql = $this->_drop_table($this->db->dbprefix.$table_name);
+ if ($table_name === '')
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_table_name_required') : FALSE;
+ }
- if (is_bool($sql))
+ if (($query = $this->_drop_table($this->db->dbprefix.$table_name, $if_exists)) === TRUE)
{
- return $sql;
+ return TRUE;
}
- return $this->db->query($sql);
+ $query = $this->db->query($query);
+
+ // Update table list cache
+ if ($query && ! empty($this->db->data_cache['table_names']))
+ {
+ $key = array_search(strtolower($this->db->dbprefix.$table_name), array_map('strtolower', $this->db->data_cache['table_names']), TRUE);
+ if ($key !== FALSE)
+ {
+ unset($this->db->data_cache['table_names'][$key]);
+ }
+ }
+
+ return $query;
}
// --------------------------------------------------------------------
/**
- * Rename Table
+ * Drop Table
*
- * @access public
- * @param string the old table name
- * @param string the new table name
- * @return bool
+ * Generates a platform-specific DROP TABLE string
+ *
+ * @param string $table Table name
+ * @param bool $if_exists Whether to add an IF EXISTS condition
+ * @return mixed (Returns a platform-specific DROP table string, or TRUE to indicate there's nothing to do)
*/
- function rename_table($table_name, $new_table_name)
+ protected function _drop_table($table, $if_exists)
{
- if ($table_name == '' OR $new_table_name == '')
+ $sql = 'DROP TABLE';
+
+ if ($if_exists)
{
- show_error('A table name is required for that operation.');
+ if ($this->_drop_table_if === FALSE)
+ {
+ if ( ! $this->db->table_exists($table))
+ {
+ return TRUE;
+ }
+ }
+ else
+ {
+ $sql = sprintf($this->_drop_table_if, $this->db->escape_identifiers($table));
+ }
}
- $sql = $this->_rename_table($this->db->dbprefix.$table_name, $this->db->dbprefix.$new_table_name);
- return $this->db->query($sql);
+ return $sql.' '.$this->db->escape_identifiers($table);
}
// --------------------------------------------------------------------
/**
- * Column Add
+ * Rename Table
*
- * @access public
- * @param string the table name
- * @param string the column name
- * @param string the column definition
+ * @param string $table_name Old table name
+ * @param string $new_table_name New table name
* @return bool
*/
- function add_column($table = '', $field = array(), $after_field = '')
+ public function rename_table($table_name, $new_table_name)
{
- if ($table == '')
+ if ($table_name === '' OR $new_table_name === '')
{
show_error('A table name is required for that operation.');
+ return FALSE;
+ }
+ elseif ($this->_rename_table === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
}
- // add field info into field array, but we can only do one at a time
- // so we cycle through
+ $result = $this->db->query(sprintf($this->_rename_table,
+ $this->db->escape_identifiers($this->db->dbprefix.$table_name),
+ $this->db->escape_identifiers($this->db->dbprefix.$new_table_name))
+ );
- foreach ($field as $k => $v)
+ if ($result && ! empty($this->db->data_cache['table_names']))
{
- $this->add_field(array($k => $field[$k]));
+ $key = array_search(strtolower($this->db->dbprefix.$table_name), array_map('strtolower', $this->db->data_cache['table_names']), TRUE);
+ if ($key !== FALSE)
+ {
+ $this->db->data_cache['table_names'][$key] = $this->db->dbprefix.$new_table_name;
+ }
+ }
+
+ return $result;
+ }
- if (count($this->fields) == 0)
+ // --------------------------------------------------------------------
+
+ /**
+ * Column Add
+ *
+ * @todo Remove deprecated $_after option in 3.1+
+ * @param string $table Table name
+ * @param array $field Column definition
+ * @param string $_after Column for AFTER clause (deprecated)
+ * @return bool
+ */
+ public function add_column($table, $field, $_after = NULL)
+ {
+ // Work-around for literal column definitions
+ is_array($field) OR $field = array($field);
+
+ foreach (array_keys($field) as $k)
+ {
+ // Backwards-compatibility work-around for MySQL/CUBRID AFTER clause (remove in 3.1+)
+ if ($_after !== NULL && is_array($field[$k]) && ! isset($field[$k]['after']))
{
- show_error('Field information is required.');
+ $field[$k]['after'] = $_after;
}
- $sql = $this->_alter_table('ADD', $this->db->dbprefix.$table, $this->fields, $after_field);
+ $this->add_field(array($k => $field[$k]));
+ }
- $this->_reset();
+ $sqls = $this->_alter_table('ADD', $this->db->dbprefix.$table, $this->_process_fields());
+ $this->_reset();
+ if ($sqls === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
+ }
- if ($this->db->query($sql) === FALSE)
+ for ($i = 0, $c = count($sqls); $i < $c; $i++)
+ {
+ if ($this->db->query($sqls[$i]) === FALSE)
{
return FALSE;
}
}
return TRUE;
-
}
// --------------------------------------------------------------------
@@ -287,76 +600,419 @@ class CI_DB_forge {
/**
* Column Drop
*
- * @access public
- * @param string the table name
- * @param string the column name
+ * @param string $table Table name
+ * @param string $column_name Column name
+ * @return bool
+ */
+ public function drop_column($table, $column_name)
+ {
+ $sql = $this->_alter_table('DROP', $this->db->dbprefix.$table, $column_name);
+ if ($sql === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
+ }
+
+ return $this->db->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Column Modify
+ *
+ * @param string $table Table name
+ * @param string $field Column definition
* @return bool
*/
- function drop_column($table = '', $column_name = '')
+ public function modify_column($table, $field)
{
+ // Work-around for literal column definitions
+ is_array($field) OR $field = array($field);
- if ($table == '')
+ foreach (array_keys($field) as $k)
{
- show_error('A table name is required for that operation.');
+ $this->add_field(array($k => $field[$k]));
}
- if ($column_name == '')
+ if (count($this->fields) === 0)
{
- show_error('A column name is required for that operation.');
+ show_error('Field information is required.');
}
- $sql = $this->_alter_table('DROP', $this->db->dbprefix.$table, $column_name);
+ $sqls = $this->_alter_table('CHANGE', $this->db->dbprefix.$table, $this->_process_fields());
+ $this->_reset();
+ if ($sqls === FALSE)
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
+ }
- return $this->db->query($sql);
+ for ($i = 0, $c = count($sqls); $i < $c; $i++)
+ {
+ if ($this->db->query($sqls[$i]) === FALSE)
+ {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
}
// --------------------------------------------------------------------
/**
- * Column Modify
+ * ALTER TABLE
*
- * @access public
- * @param string the table name
- * @param string the column name
- * @param string the column definition
- * @return bool
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
*/
- function modify_column($table = '', $field = array())
+ protected function _alter_table($alter_type, $table, $field)
{
- if ($table == '')
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' ';
+
+ // DROP has everything it needs now.
+ if ($alter_type === 'DROP')
{
- show_error('A table name is required for that operation.');
+ return $sql.'DROP COLUMN '.$this->db->escape_identifiers($field);
}
- // add field info into field array, but we can only do one at a time
- // so we cycle through
+ $sql .= ($alter_type === 'ADD')
+ ? 'ADD '
+ : $alter_type.' COLUMN ';
- foreach ($field as $k => $v)
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
{
- // If no name provided, use the current name
- if ( ! isset($field[$k]['name']))
+ $sqls[] = $sql
+ .($field[$i]['_literal'] !== FALSE ? $field[$i]['_literal'] : $this->_process_column($field[$i]));
+ }
+
+ return $sqls;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process fields
+ *
+ * @param bool $create_table
+ * @return array
+ */
+ protected function _process_fields($create_table = FALSE)
+ {
+ $fields = array();
+
+ foreach ($this->fields as $key => $attributes)
+ {
+ if (is_int($key) && ! is_array($attributes))
{
- $field[$k]['name'] = $k;
+ $fields[] = array('_literal' => $attributes);
+ continue;
}
- $this->add_field(array($k => $field[$k]));
+ $attributes = array_change_key_case($attributes, CASE_UPPER);
- if (count($this->fields) == 0)
+ if ($create_table === TRUE && empty($attributes['TYPE']))
{
- show_error('Field information is required.');
+ continue;
}
- $sql = $this->_alter_table('CHANGE', $this->db->dbprefix.$table, $this->fields);
+ isset($attributes['TYPE']) && $this->_attr_type($attributes);
- $this->_reset();
+ $field = array(
+ 'name' => $key,
+ 'new_name' => isset($attributes['NAME']) ? $attributes['NAME'] : NULL,
+ 'type' => isset($attributes['TYPE']) ? $attributes['TYPE'] : NULL,
+ 'length' => '',
+ 'unsigned' => '',
+ 'null' => '',
+ 'unique' => '',
+ 'default' => '',
+ 'auto_increment' => '',
+ '_literal' => FALSE
+ );
- if ($this->db->query($sql) === FALSE)
+ isset($attributes['TYPE']) && $this->_attr_unsigned($attributes, $field);
+
+ if ($create_table === FALSE)
{
- return FALSE;
+ if (isset($attributes['AFTER']))
+ {
+ $field['after'] = $attributes['AFTER'];
+ }
+ elseif (isset($attributes['FIRST']))
+ {
+ $field['first'] = (bool) $attributes['FIRST'];
+ }
+ }
+
+ $this->_attr_default($attributes, $field);
+
+ if (isset($attributes['NULL']))
+ {
+ if ($attributes['NULL'] === TRUE)
+ {
+ $field['null'] = empty($this->_null) ? '' : ' '.$this->_null;
+ }
+ else
+ {
+ $field['null'] = ' NOT NULL';
+ }
+ }
+ elseif ($create_table === TRUE)
+ {
+ $field['null'] = ' NOT NULL';
+ }
+
+ $this->_attr_auto_increment($attributes, $field);
+ $this->_attr_unique($attributes, $field);
+
+ if (isset($attributes['COMMENT']))
+ {
+ $field['comment'] = $this->db->escape($attributes['COMMENT']);
}
+
+ if (isset($attributes['TYPE']) && ! empty($attributes['CONSTRAINT']))
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'ENUM':
+ case 'SET':
+ $attributes['CONSTRAINT'] = $this->db->escape($attributes['CONSTRAINT']);
+ default:
+ $field['length'] = is_array($attributes['CONSTRAINT'])
+ ? '('.implode(',', $attributes['CONSTRAINT']).')'
+ : '('.$attributes['CONSTRAINT'].')';
+ break;
+ }
+ }
+
+ $fields[] = $field;
}
- return TRUE;
+ return $fields;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ return $this->db->escape_identifiers($field['name'])
+ .' '.$field['type'].$field['length']
+ .$field['unsigned']
+ .$field['default']
+ .$field['null']
+ .$field['auto_increment']
+ .$field['unique'];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ // Usually overridden by drivers
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute UNSIGNED
+ *
+ * Depending on the _unsigned property value:
+ *
+ * - TRUE will always set $field['unsigned'] to 'UNSIGNED'
+ * - FALSE will always set $field['unsigned'] to ''
+ * - array(TYPE) will set $field['unsigned'] to 'UNSIGNED',
+ * if $attributes['TYPE'] is found in the array
+ * - array(TYPE => UTYPE) will change $field['type'],
+ * from TYPE to UTYPE in case of a match
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_unsigned(&$attributes, &$field)
+ {
+ if (empty($attributes['UNSIGNED']) OR $attributes['UNSIGNED'] !== TRUE)
+ {
+ return;
+ }
+
+ // Reset the attribute in order to avoid issues if we do type conversion
+ $attributes['UNSIGNED'] = FALSE;
+
+ if (is_array($this->_unsigned))
+ {
+ foreach (array_keys($this->_unsigned) as $key)
+ {
+ if (is_int($key) && strcasecmp($attributes['TYPE'], $this->_unsigned[$key]) === 0)
+ {
+ $field['unsigned'] = ' UNSIGNED';
+ return;
+ }
+ elseif (is_string($key) && strcasecmp($attributes['TYPE'], $key) === 0)
+ {
+ $field['type'] = $key;
+ return;
+ }
+ }
+
+ return;
+ }
+
+ $field['unsigned'] = ($this->_unsigned === TRUE) ? ' UNSIGNED' : '';
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute DEFAULT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_default(&$attributes, &$field)
+ {
+ if ($this->_default === FALSE)
+ {
+ return;
+ }
+
+ if (array_key_exists('DEFAULT', $attributes))
+ {
+ if ($attributes['DEFAULT'] === NULL)
+ {
+ $field['default'] = empty($this->_null) ? '' : $this->_default.$this->_null;
+
+ // Override the NULL attribute if that's our default
+ $attributes['NULL'] = TRUE;
+ $field['null'] = empty($this->_null) ? '' : ' '.$this->_null;
+ }
+ else
+ {
+ $field['default'] = $this->_default.$this->db->escape($attributes['DEFAULT']);
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute UNIQUE
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_unique(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['UNIQUE']) && $attributes['UNIQUE'] === TRUE)
+ {
+ $field['unique'] = ' UNIQUE';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
+ {
+ $field['auto_increment'] = ' AUTO_INCREMENT';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process primary keys
+ *
+ * @param string $table Table name
+ * @return string
+ */
+ protected function _process_primary_keys($table)
+ {
+ $sql = '';
+
+ for ($i = 0, $c = count($this->primary_keys); $i < $c; $i++)
+ {
+ if ( ! isset($this->fields[$this->primary_keys[$i]]))
+ {
+ unset($this->primary_keys[$i]);
+ }
+ }
+
+ if (count($this->primary_keys) > 0)
+ {
+ $sql .= ",\n\tCONSTRAINT ".$this->db->escape_identifiers('pk_'.$table)
+ .' PRIMARY KEY('.implode(', ', $this->db->escape_identifiers($this->primary_keys)).')';
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process indexes
+ *
+ * @param string $table Table name
+ * @return string[] list of SQL statements
+ */
+ protected function _process_indexes($table)
+ {
+ $sqls = array();
+
+ for ($i = 0, $c = count($this->keys); $i < $c; $i++)
+ {
+ if (is_array($this->keys[$i]))
+ {
+ for ($i2 = 0, $c2 = count($this->keys[$i]); $i2 < $c2; $i2++)
+ {
+ if ( ! isset($this->fields[$this->keys[$i][$i2]]))
+ {
+ unset($this->keys[$i][$i2]);
+ continue;
+ }
+ }
+ }
+ elseif ( ! isset($this->fields[$this->keys[$i]]))
+ {
+ unset($this->keys[$i]);
+ continue;
+ }
+
+ is_array($this->keys[$i]) OR $this->keys[$i] = array($this->keys[$i]);
+
+ $sqls[] = 'CREATE INDEX '.$this->db->escape_identifiers($table.'_'.implode('_', $this->keys[$i]))
+ .' ON '.$this->db->escape_identifiers($table)
+ .' ('.implode(', ', $this->db->escape_identifiers($this->keys[$i])).');';
+ }
+
+ return $sqls;
}
// --------------------------------------------------------------------
@@ -366,17 +1022,11 @@ class CI_DB_forge {
*
* Resets table creation vars
*
- * @access private
* @return void
*/
- function _reset()
+ protected function _reset()
{
- $this->fields = array();
- $this->keys = array();
- $this->primary_keys = array();
+ $this->fields = $this->keys = $this->primary_keys = array();
}
}
-
-/* End of file DB_forge.php */
-/* Location: ./system/database/DB_forge.php */ \ No newline at end of file