Renaming Active Record to Query Builder across the system
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
new file mode 100644
index 0000000..b6ad0f3
--- /dev/null
+++ b/system/database/DB_query_builder.php
@@ -0,0 +1,2217 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst. It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link http://codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Query Builder Class
+ *
+ * This is the platform-independent base Query Builder implementation class.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_query_builder extends CI_DB_driver {
+
+ protected $return_delete_sql = FALSE;
+ protected $reset_delete_data = FALSE;
+
+ protected $qb_select = array();
+ protected $qb_distinct = FALSE;
+ protected $qb_from = array();
+ protected $qb_join = array();
+ protected $qb_where = array();
+ protected $qb_like = array();
+ protected $qb_groupby = array();
+ protected $qb_having = array();
+ protected $qb_keys = array();
+ protected $qb_limit = FALSE;
+ protected $qb_offset = FALSE;
+ protected $qb_order = FALSE;
+ protected $qb_orderby = array();
+ protected $qb_set = array();
+ protected $qb_wherein = array();
+ protected $qb_aliased_tables = array();
+ protected $qb_store_array = array();
+ protected $qb_where_group_started = FALSE;
+ protected $qb_where_group_count = 0;
+
+ // Query Builder Caching variables
+ protected $qb_caching = FALSE;
+ protected $qb_cache_exists = array();
+ protected $qb_cache_select = array();
+ protected $qb_cache_from = array();
+ protected $qb_cache_join = array();
+ protected $qb_cache_where = array();
+ protected $qb_cache_like = array();
+ protected $qb_cache_groupby = array();
+ protected $qb_cache_having = array();
+ protected $qb_cache_orderby = array();
+ protected $qb_cache_set = array();
+
+ protected $qb_no_escape = array();
+ protected $qb_cache_no_escape = array();
+
+ /**
+ * Select
+ *
+ * Generates the SELECT portion of the query
+ *
+ * @param string
+ * @return object
+ */
+ public function select($select = '*', $escape = NULL)
+ {
+ if (is_string($select))
+ {
+ $select = explode(',', $select);
+ }
+
+ foreach ($select as $val)
+ {
+ $val = trim($val);
+
+ if ($val != '')
+ {
+ $this->qb_select[] = $val;
+ $this->qb_no_escape[] = $escape;
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_select[] = $val;
+ $this->qb_cache_exists[] = 'select';
+ $this->qb_cache_no_escape[] = $escape;
+ }
+ }
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Select Max
+ *
+ * Generates a SELECT MAX(field) portion of a query
+ *
+ * @param string the field
+ * @param string an alias
+ * @return object
+ */
+ public function select_max($select = '', $alias = '')
+ {
+ return $this->_max_min_avg_sum($select, $alias, 'MAX');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Select Min
+ *
+ * Generates a SELECT MIN(field) portion of a query
+ *
+ * @param string the field
+ * @param string an alias
+ * @return object
+ */
+ public function select_min($select = '', $alias = '')
+ {
+ return $this->_max_min_avg_sum($select, $alias, 'MIN');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Select Average
+ *
+ * Generates a SELECT AVG(field) portion of a query
+ *
+ * @param string the field
+ * @param string an alias
+ * @return object
+ */
+ public function select_avg($select = '', $alias = '')
+ {
+ return $this->_max_min_avg_sum($select, $alias, 'AVG');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Select Sum
+ *
+ * Generates a SELECT SUM(field) portion of a query
+ *
+ * @param string the field
+ * @param string an alias
+ * @return object
+ */
+ public function select_sum($select = '', $alias = '')
+ {
+ return $this->_max_min_avg_sum($select, $alias, 'SUM');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Processing Function for the four functions above:
+ *
+ * select_max()
+ * select_min()
+ * select_avg()
+ * select_sum()
+ *
+ * @param string the field
+ * @param string an alias
+ * @return object
+ */
+ protected function _max_min_avg_sum($select = '', $alias = '', $type = 'MAX')
+ {
+ if ( ! is_string($select) OR $select == '')
+ {
+ $this->display_error('db_invalid_query');
+ }
+
+ $type = strtoupper($type);
+
+ if ( ! in_array($type, array('MAX', 'MIN', 'AVG', 'SUM')))
+ {
+ show_error('Invalid function type: '.$type);
+ }
+
+ if ($alias == '')
+ {
+ $alias = $this->_create_alias_from_table(trim($select));
+ }
+
+ $sql = $this->_protect_identifiers($type.'('.trim($select).')').' AS '.$this->_protect_identifiers(trim($alias));
+ $this->qb_select[] = $sql;
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_select[] = $sql;
+ $this->qb_cache_exists[] = 'select';
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Determines the alias name based on the table
+ *
+ * @param string
+ * @return string
+ */
+ protected function _create_alias_from_table($item)
+ {
+ if (strpos($item, '.') !== FALSE)
+ {
+ return end(explode('.', $item));
+ }
+
+ return $item;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * DISTINCT
+ *
+ * Sets a flag which tells the query string compiler to add DISTINCT
+ *
+ * @param bool
+ * @return object
+ */
+ public function distinct($val = TRUE)
+ {
+ $this->qb_distinct = (is_bool($val)) ? $val : TRUE;
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * From
+ *
+ * Generates the FROM portion of the query
+ *
+ * @param mixed can be a string or array
+ * @return object
+ */
+ public function from($from)
+ {
+ foreach ((array)$from as $val)
+ {
+ if (strpos($val, ',') !== FALSE)
+ {
+ foreach (explode(',', $val) as $v)
+ {
+ $v = trim($v);
+ $this->_track_aliases($v);
+ $v = $this->qb_from[] = $this->_protect_identifiers($v, TRUE, NULL, FALSE);
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_from[] = $v;
+ $this->qb_cache_exists[] = 'from';
+ }
+ }
+ }
+ else
+ {
+ $val = trim($val);
+
+ // Extract any aliases that might exist. We use this information
+ // in the _protect_identifiers to know whether to add a table prefix
+ $this->_track_aliases($val);
+ $this->qb_from[] = $val = $this->_protect_identifiers($val, TRUE, NULL, FALSE);
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_from[] = $val;
+ $this->qb_cache_exists[] = 'from';
+ }
+ }
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Join
+ *
+ * Generates the JOIN portion of the query
+ *
+ * @param string
+ * @param string the join condition
+ * @param string the type of join
+ * @return object
+ */
+ public function join($table, $cond, $type = '')
+ {
+ if ($type != '')
+ {
+ $type = strtoupper(trim($type));
+
+ if ( ! in_array($type, array('LEFT', 'RIGHT', 'OUTER', 'INNER', 'LEFT OUTER', 'RIGHT OUTER')))
+ {
+ $type = '';
+ }
+ else
+ {
+ $type .= ' ';
+ }
+ }
+
+ // Extract any aliases that might exist. We use this information
+ // in the _protect_identifiers to know whether to add a table prefix
+ $this->_track_aliases($table);
+
+ // Strip apart the condition and protect the identifiers
+ if (preg_match('/([\w\.]+)([\W\s]+)(.+)/', $cond, $match))
+ {
+ $cond = $this->_protect_identifiers($match[1]).$match[2].$this->_protect_identifiers($match[3]);
+ }
+
+ // Assemble the JOIN statement
+ $this->qb_join[] = $join = $type.'JOIN '.$this->_protect_identifiers($table, TRUE, NULL, FALSE).' ON '.$cond;
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_join[] = $join;
+ $this->qb_cache_exists[] = 'join';
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where
+ *
+ * Generates the WHERE portion of the query. Separates
+ * multiple calls with AND
+ *
+ * @param mixed
+ * @param mixed
+ * @return object
+ */
+ public function where($key, $value = NULL, $escape = TRUE)
+ {
+ return $this->_where($key, $value, 'AND ', $escape);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * OR Where
+ *
+ * Generates the WHERE portion of the query. Separates
+ * multiple calls with OR
+ *
+ * @param mixed
+ * @param mixed
+ * @return object
+ */
+ public function or_where($key, $value = NULL, $escape = TRUE)
+ {
+ return $this->_where($key, $value, 'OR ', $escape);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where
+ *
+ * Called by where() or or_where()
+ *
+ * @param mixed
+ * @param mixed
+ * @param string
+ * @return object
+ */
+ protected function _where($key, $value = NULL, $type = 'AND ', $escape = NULL)
+ {
+ $type = $this->_group_get_type($type);
+
+ if ( ! is_array($key))
+ {
+ $key = array($key => $value);
+ }
+
+ // If the escape value was not set will will base it on the global setting
+ if ( ! is_bool($escape))
+ {
+ $escape = $this->_protect_identifiers;
+ }
+
+ foreach ($key as $k => $v)
+ {
+ $prefix = (count($this->qb_where) === 0 AND count($this->qb_cache_where) === 0) ? '' : $type;
+
+ if (is_null($v) && ! $this->_has_operator($k))
+ {
+ // value appears not to have been set, assign the test to IS NULL
+ $k .= ' IS NULL';
+ }
+
+ if ( ! is_null($v))
+ {
+ if ($escape === TRUE)
+ {
+ $k = $this->_protect_identifiers($k, FALSE, $escape);
+ $v = ' '.$this->escape($v);
+ }
+
+ if ( ! $this->_has_operator($k))
+ {
+ $k .= ' = ';
+ }
+ }
+ else
+ {
+ $k = $this->_protect_identifiers($k, FALSE, $escape);
+ }
+
+ $this->qb_where[] = $prefix.$k.$v;
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_where[] = $prefix.$k.$v;
+ $this->qb_cache_exists[] = 'where';
+ }
+
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where_in
+ *
+ * Generates a WHERE field IN ('item', 'item') SQL query joined with
+ * AND if appropriate
+ *
+ * @param string The field to search
+ * @param array The values searched on
+ * @return object
+ */
+ public function where_in($key = NULL, $values = NULL)
+ {
+ return $this->_where_in($key, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where_in_or
+ *
+ * Generates a WHERE field IN ('item', 'item') SQL query joined with
+ * OR if appropriate
+ *
+ * @param string The field to search
+ * @param array The values searched on
+ * @return object
+ */
+ public function or_where_in($key = NULL, $values = NULL)
+ {
+ return $this->_where_in($key, $values, FALSE, 'OR ');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where_not_in
+ *
+ * Generates a WHERE field NOT IN ('item', 'item') SQL query joined
+ * with AND if appropriate
+ *
+ * @param string The field to search
+ * @param array The values searched on
+ * @return object
+ */
+ public function where_not_in($key = NULL, $values = NULL)
+ {
+ return $this->_where_in($key, $values, TRUE);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where_not_in_or
+ *
+ * Generates a WHERE field NOT IN ('item', 'item') SQL query joined
+ * with OR if appropriate
+ *
+ * @param string The field to search
+ * @param array The values searched on
+ * @return object
+ */
+ public function or_where_not_in($key = NULL, $values = NULL)
+ {
+ return $this->_where_in($key, $values, TRUE, 'OR ');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Where_in
+ *
+ * Called by where_in, where_in_or, where_not_in, where_not_in_or
+ *
+ * @param string The field to search
+ * @param array The values searched on
+ * @param boolean If the statement would be IN or NOT IN
+ * @param string
+ * @return object
+ */
+ protected function _where_in($key = NULL, $values = NULL, $not = FALSE, $type = 'AND ')
+ {
+ if ($key === NULL OR $values === NULL)
+ {
+ return;
+ }
+
+ $type = $this->_group_get_type($type);
+
+ if ( ! is_array($values))
+ {
+ $values = array($values);
+ }
+
+ $not = ($not) ? ' NOT' : '';
+
+ foreach ($values as $value)
+ {
+ $this->qb_wherein[] = $this->escape($value);
+ }
+
+ $prefix = (count($this->qb_where) === 0) ? '' : $type;
+ $this->qb_where[] = $where_in = $prefix.$this->_protect_identifiers($key).$not.' IN ('.implode(', ', $this->qb_wherein).') ';
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_where[] = $where_in;
+ $this->qb_cache_exists[] = 'where';
+ }
+
+ // reset the array for multiple calls
+ $this->qb_wherein = array();
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Like
+ *
+ * Generates a %LIKE% portion of the query. Separates
+ * multiple calls with AND
+ *
+ * @param mixed
+ * @param mixed
+ * @return object
+ */
+ public function like($field, $match = '', $side = 'both')
+ {
+ return $this->_like($field, $match, 'AND ', $side);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Not Like
+ *
+ * Generates a NOT LIKE portion of the query. Separates
+ * multiple calls with AND
+ *
+ * @param mixed
+ * @param mixed
+ * @return object
+ */
+ public function not_like($field, $match = '', $side = 'both')
+ {
+ return $this->_like($field, $match, 'AND ', $side, 'NOT');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * OR Like
+ *
+ * Generates a %LIKE% portion of the query. Separates
+ * multiple calls with OR
+ *
+ * @param mixed
+ * @param mixed
+ * @return object
+ */
+ public function or_like($field, $match = '', $side = 'both')
+ {
+ return $this->_like($field, $match, 'OR ', $side);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * OR Not Like
+ *
+ * Generates a NOT LIKE portion of the query. Separates
+ * multiple calls with OR
+ *
+ * @param mixed
+ * @param mixed
+ * @return object
+ */
+ public function or_not_like($field, $match = '', $side = 'both')
+ {
+ return $this->_like($field, $match, 'OR ', $side, 'NOT');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Like
+ *
+ * Called by like() or orlike()
+ *
+ * @param mixed
+ * @param mixed
+ * @param string
+ * @return object
+ */
+ protected function _like($field, $match = '', $type = 'AND ', $side = 'both', $not = '')
+ {
+ $type = $this->_group_get_type($type);
+
+ if ( ! is_array($field))
+ {
+ $field = array($field => $match);
+ }
+
+ foreach ($field as $k => $v)
+ {
+ $k = $this->_protect_identifiers($k);
+ $prefix = (count($this->qb_like) === 0) ? '' : $type;
+ $v = $this->escape_like_str($v);
+
+ if ($side === 'none')
+ {
+ $like_statement = $prefix." $k $not LIKE '{$v}'";
+ }
+ elseif ($side === 'before')
+ {
+ $like_statement = $prefix." $k $not LIKE '%{$v}'";
+ }
+ elseif ($side === 'after')
+ {
+ $like_statement = $prefix." $k $not LIKE '{$v}%'";
+ }
+ else
+ {
+ $like_statement = $prefix." $k $not LIKE '%{$v}%'";
+ }
+
+ // some platforms require an escape sequence definition for LIKE wildcards
+ if ($this->_like_escape_str != '')
+ {
+ $like_statement = $like_statement.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ $this->qb_like[] = $like_statement;
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_like[] = $like_statement;
+ $this->qb_cache_exists[] = 'like';
+ }
+
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Starts a query group.
+ *
+ * @param string (Internal use only)
+ * @param string (Internal use only)
+ * @return object
+ */
+ public function group_start($not = '', $type = 'AND ')
+ {
+ $type = $this->_group_get_type($type);
+ $this->qb_where_group_started = TRUE;
+ $prefix = (count($this->qb_where) === 0 AND count($this->qb_cache_where) === 0) ? '' : $type;
+ $this->qb_where[] = $value = $prefix.$not.str_repeat(' ', ++$this->qb_where_group_count).' (';
+
+ if ($this->qb_caching)
+ {
+ $this->qb_cache_where[] = $value;
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Starts a query group, but ORs the group
+ *
+ * @return object
+ */
+ public function or_group_start()
+ {
+ return $this->group_start('', 'OR ');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Starts a query group, but NOTs the group
+ *
+ * @return object
+ */
+ public function not_group_start()
+ {
+ return $this->group_start('NOT ', 'AND ');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Starts a query group, but OR NOTs the group
+ *
+ * @return object
+ */
+ public function or_not_group_start()
+ {
+ return $this->group_start('NOT ', 'OR ');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Ends a query group
+ *
+ * @return object
+ */
+ public function group_end()
+ {
+ $this->qb_where_group_started = FALSE;
+ $this->qb_where[] = $value = str_repeat(' ', $this->qb_where_group_count--) . ')';
+
+ if ($this->qb_caching)
+ {
+ $this->qb_cache_where[] = $value;
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Group_get_type
+ *
+ * Called by group_start(), _like(), _where() and _where_in()
+ *
+ * @param string
+ * @return string
+ */
+ protected function _group_get_type($type)
+ {
+ if ($this->qb_where_group_started)
+ {
+ $type = '';
+ $this->qb_where_group_started = FALSE;
+ }
+
+ return $type;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * GROUP BY
+ *
+ * @param string
+ * @return object
+ */
+ public function group_by($by)
+ {
+ if (is_string($by))
+ {
+ $by = explode(',', $by);
+ }
+
+ foreach ($by as $val)
+ {
+ $val = trim($val);
+
+ if ($val != '')
+ {
+ $this->qb_groupby[] = $val = $this->_protect_identifiers($val);
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_groupby[] = $val;
+ $this->qb_cache_exists[] = 'groupby';
+ }
+ }
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Sets the HAVING value
+ *
+ * Separates multiple calls with AND
+ *
+ * @param string
+ * @param string
+ * @return object
+ */
+ public function having($key, $value = '', $escape = TRUE)
+ {
+ return $this->_having($key, $value, 'AND ', $escape);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Sets the OR HAVING value
+ *
+ * Separates multiple calls with OR
+ *
+ * @param string
+ * @param string
+ * @return object
+ */
+ public function or_having($key, $value = '', $escape = TRUE)
+ {
+ return $this->_having($key, $value, 'OR ', $escape);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Sets the HAVING values
+ *
+ * Called by having() or or_having()
+ *
+ * @param string
+ * @param string
+ * @return object
+ */
+ protected function _having($key, $value = '', $type = 'AND ', $escape = TRUE)
+ {
+ if ( ! is_array($key))
+ {
+ $key = array($key => $value);
+ }
+
+ foreach ($key as $k => $v)
+ {
+ $prefix = (count($this->qb_having) === 0) ? '' : $type;
+
+ if ($escape === TRUE)
+ {
+ $k = $this->_protect_identifiers($k);
+ }
+
+ if ( ! $this->_has_operator($k))
+ {
+ $k .= ' = ';
+ }
+
+ if ($v != '')
+ {
+ $v = ' '.$this->escape($v);
+ }
+
+ $this->qb_having[] = $prefix.$k.$v;
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_having[] = $prefix.$k.$v;
+ $this->qb_cache_exists[] = 'having';
+ }
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Sets the ORDER BY value
+ *
+ * @param string
+ * @param string direction: asc or desc
+ * @param bool enable field name escaping
+ * @return object
+ */
+ public function order_by($orderby, $direction = '', $escape = TRUE)
+ {
+ if (strtolower($direction) === 'random')
+ {
+ $orderby = ''; // Random results want or don't need a field name
+ $direction = $this->_random_keyword;
+ }
+ elseif (trim($direction) != '')
+ {
+ $direction = (in_array(strtoupper(trim($direction)), array('ASC', 'DESC'), TRUE)) ? ' '.$direction : ' ASC';
+ }
+
+
+ if ((strpos($orderby, ',') !== FALSE) && $escape === TRUE)
+ {
+ $temp = array();
+ foreach (explode(',', $orderby) as $part)
+ {
+ $part = trim($part);
+ if ( ! in_array($part, $this->qb_aliased_tables))
+ {
+ $part = $this->_protect_identifiers(trim($part));
+ }
+
+ $temp[] = $part;
+ }
+
+ $orderby = implode(', ', $temp);
+ }
+ elseif ($direction != $this->_random_keyword)
+ {
+ if ($escape === TRUE)
+ {
+ $orderby = $this->_protect_identifiers($orderby);
+ }
+ }
+
+ $this->qb_orderby[] = $orderby_statement = $orderby.$direction;
+
+ if ($this->qb_caching === TRUE)
+ {
+ $this->qb_cache_orderby[] = $orderby_statement;
+ $this->qb_cache_exists[] = 'orderby';
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Sets the LIMIT value
+ *
+ * @param integer the limit value
+ * @param integer the offset value
+ * @return object
+ */
+ public function limit($value, $offset = NULL)
+ {
+ $this->qb_limit = (int) $value;
+
+ if ( ! is_null($offset))
+ {
+ $this->qb_offset = (int) $offset;
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Sets the OFFSET value
+ *
+ * @param integer the offset value
+ * @return object
+ */
+ public function offset($offset)
+ {
+ $this->qb_offset = (int) $offset;
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * The "set" function. Allows key/value pairs to be set for inserting or updating
+ *
+ * @param mixed
+ * @param string
+ * @param boolean
+ * @return object
+ */
+ public function set($key, $value = '', $escape = TRUE)
+ {
+ $key = $this->_object_to_array($key);
+
+ if ( ! is_array($key))
+ {
+ $key = array($key => $value);
+ }
+
+ foreach ($key as $k => $v)
+ {
+ if ($escape === FALSE)
+ {
+ $this->qb_set[$this->_protect_identifiers($k)] = $v;
+ }
+ else
+ {
+ $this->qb_set[$this->_protect_identifiers($k, FALSE, TRUE)] = $this->escape($v);
+ }
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Get SELECT query string
+ *
+ * Compiles a SELECT query string and returns the sql.
+ *
+ * @access public
+ * @param string the table name to select from (optional)
+ * @param boolean TRUE: resets AR values; FALSE: leave AR vaules alone
+ * @return string
+ */
+ public function get_compiled_select($table = '', $reset = TRUE)
+ {
+ if ($table != '')
+ {
+ $this->_track_aliases($table);
+ $this->from($table);
+ }
+
+ $select = $this->_compile_select();
+
+ if ($reset === TRUE)
+ {
+ $this->_reset_select();
+ }
+
+ return $select;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Get
+ *
+ * Compiles the select statement based on the other functions called
+ * and runs the query
+ *
+ * @param string the table
+ * @param string the limit clause
+ * @param string the offset clause
+ * @return object
+ */
+ public function get($table = '', $limit = null, $offset = null)
+ {
+ if ($table != '')
+ {
+ $this->_track_aliases($table);
+ $this->from($table);
+ }
+
+ if ( ! is_null($limit))
+ {
+ $this->limit($limit, $offset);
+ }
+
+ $result = $this->query($this->_compile_select());
+ $this->_reset_select();
+ return $result;
+ }
+
+ /**
+ * "Count All Results" query
+ *
+ * Generates a platform-specific query string that counts all records
+ * returned by an Query Builder query.
+ *
+ * @param string
+ * @return string
+ */
+ public function count_all_results($table = '')
+ {
+ if ($table != '')
+ {
+ $this->_track_aliases($table);
+ $this->from($table);
+ }
+
+ $result = $this->query($this->_compile_select($this->_count_string.$this->_protect_identifiers('numrows')));
+ $this->_reset_select();
+
+ if ($result->num_rows() === 0)
+ {
+ return 0;
+ }
+
+ $row = $result->row();
+ return (int) $row->numrows;
+ }
+ // --------------------------------------------------------------------
+
+ /**
+ * Get_Where
+ *
+ * Allows the where clause, limit and offset to be added directly
+ *
+ * @param string the where clause
+ * @param string the limit clause
+ * @param string the offset clause
+ * @return object
+ */
+ public function get_where($table = '', $where = null, $limit = null, $offset = null)
+ {
+ if ($table != '')
+ {
+ $this->from($table);
+ }
+
+ if ( ! is_null($where))
+ {
+ $this->where($where);
+ }
+
+ if ( ! is_null($limit))
+ {
+ $this->limit($limit, $offset);
+ }
+
+ $result = $this->query($this->_compile_select());
+ $this->_reset_select();
+ return $result;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert_Batch
+ *
+ * Compiles batch insert strings and runs the queries
+ *
+ * @param string the table to retrieve the results from
+ * @param array an associative array of insert values
+ * @return object
+ */
+ public function insert_batch($table = '', $set = NULL)
+ {
+ if ( ! is_null($set))
+ {
+ $this->set_insert_batch($set);
+ }
+
+ if (count($this->qb_set) === 0)
+ {
+ if ($this->db_debug)
+ {
+ // No valid data array. Folds in cases where keys and values did not match up
+ return $this->display_error('db_must_use_set');
+ }
+ return FALSE;
+ }
+
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+
+ $table = $this->qb_from[0];
+ }
+
+ // Batch this baby
+ for ($i = 0, $total = count($this->qb_set); $i < $total; $i += 100)
+ {
+ $this->query($this->_insert_batch($this->_protect_identifiers($table, TRUE, NULL, FALSE), $this->qb_keys, array_slice($this->qb_set, $i, 100)));
+ }
+
+ $this->_reset_write();
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * The "set_insert_batch" function. Allows key/value pairs to be set for batch inserts
+ *
+ * @param mixed
+ * @param string
+ * @param boolean
+ * @return object
+ */
+ public function set_insert_batch($key, $value = '', $escape = TRUE)
+ {
+ $key = $this->_object_to_array_batch($key);
+
+ if ( ! is_array($key))
+ {
+ $key = array($key => $value);
+ }
+
+ $keys = array_keys(current($key));
+ sort($keys);
+
+ foreach ($key as $row)
+ {
+ if (count(array_diff($keys, array_keys($row))) > 0 OR count(array_diff(array_keys($row), $keys)) > 0)
+ {
+ // batch function above returns an error on an empty array
+ $this->qb_set[] = array();
+ return;
+ }
+
+ ksort($row); // puts $row in the same order as our keys
+
+ if ($escape === FALSE)
+ {
+ $this->qb_set[] = '('.implode(',', $row).')';
+ }
+ else
+ {
+ $clean = array();
+ foreach ($row as $value)
+ {
+ $clean[] = $this->escape($value);
+ }
+
+ $this->qb_set[] = '('.implode(',', $clean).')';
+ }
+ }
+
+ foreach ($keys as $k)
+ {
+ $this->qb_keys[] = $this->_protect_identifiers($k);
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Get INSERT query string
+ *
+ * Compiles an insert query and returns the sql
+ *
+ * @access public
+ * @param string the table to insert into
+ * @param boolean TRUE: reset AR values; FALSE: leave AR values alone
+ * @return string
+ */
+ public function get_compiled_insert($table = '', $reset = TRUE)
+ {
+ if ($this->_validate_insert($table) === FALSE)
+ {
+ return FALSE;
+ }
+
+ $sql = $this->_insert(
+ $this->_protect_identifiers(
+ $this->qb_from[0], TRUE, NULL, FALSE
+ ),
+ array_keys($this->qb_set),
+ array_values($this->qb_set)
+ );
+
+ if ($reset === TRUE)
+ {
+ $this->_reset_write();
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert
+ *
+ * Compiles an insert string and runs the query
+ *
+ * @access public
+ * @param string the table to insert data into
+ * @param array an associative array of insert values
+ * @return object
+ */
+ public function insert($table = '', $set = NULL)
+ {
+ if ( ! is_null($set))
+ {
+ $this->set($set);
+ }
+
+ if ($this->_validate_insert($table) === FALSE)
+ {
+ return FALSE;
+ }
+
+ $sql = $this->_insert(
+ $this->_protect_identifiers(
+ $this->qb_from[0], TRUE, NULL, FALSE
+ ),
+ array_keys($this->qb_set),
+ array_values($this->qb_set)
+ );
+
+ $this->_reset_write();
+ return $this->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Validate Insert
+ *
+ * This method is used by both insert() and get_compiled_insert() to
+ * validate that the there data is actually being set and that table
+ * has been chosen to be inserted into.
+ *
+ * @access public
+ * @param string the table to insert data into
+ * @return string
+ */
+ protected function _validate_insert($table = '')
+ {
+ if (count($this->qb_set) === 0)
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
+ }
+
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+ }
+ else
+ {
+ $this->qb_from[0] = $table;
+ }
+
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Replace
+ *
+ * Compiles an replace into string and runs the query
+ *
+ * @param string the table to replace data into
+ * @param array an associative array of insert values
+ * @return object
+ */
+ public function replace($table = '', $set = NULL)
+ {
+ if ( ! is_null($set))
+ {
+ $this->set($set);
+ }
+
+ if (count($this->qb_set) === 0)
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
+ }
+
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+
+ $table = $this->qb_from[0];
+ }
+
+ $sql = $this->_replace($this->_protect_identifiers($table, TRUE, NULL, FALSE), array_keys($this->qb_set), array_values($this->qb_set));
+ $this->_reset_write();
+ return $this->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Get UPDATE query string
+ *
+ * Compiles an update query and returns the sql
+ *
+ * @access public
+ * @param string the table to update
+ * @param boolean TRUE: reset AR values; FALSE: leave AR values alone
+ * @return string
+ */
+ public function get_compiled_update($table = '', $reset = TRUE)
+ {
+ // Combine any cached components with the current statements
+ $this->_merge_cache();
+
+ if ($this->_validate_update($table) === FALSE)
+ {
+ return FALSE;
+ }
+
+ $sql = $this->_update($this->_protect_identifiers($this->qb_from[0], TRUE, NULL, FALSE), $this->qb_set, $this->qb_where, $this->qb_orderby, $this->qb_limit);
+
+ if ($reset === TRUE)
+ {
+ $this->_reset_write();
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update
+ *
+ * Compiles an update string and runs the query
+ *
+ * @param string the table to retrieve the results from
+ * @param array an associative array of update values
+ * @param mixed the where clause
+ * @return object
+ */
+ public function update($table = '', $set = NULL, $where = NULL, $limit = NULL)
+ {
+ // Combine any cached components with the current statements
+ $this->_merge_cache();
+
+ if ( ! is_null($set))
+ {
+ $this->set($set);
+ }
+
+ if ($this->_validate_update($table) === FALSE)
+ {
+ return FALSE;
+ }
+
+ if ($where != NULL)
+ {
+ $this->where($where);
+ }
+
+ if ($limit != NULL)
+ {
+ $this->limit($limit);
+ }
+
+ $sql = $this->_update($this->_protect_identifiers($this->qb_from[0], TRUE, NULL, FALSE), $this->qb_set, $this->qb_where, $this->qb_orderby, $this->qb_limit, $this->qb_like);
+ $this->_reset_write();
+ return $this->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Validate Update
+ *
+ * This method is used by both update() and get_compiled_update() to
+ * validate that data is actually being set and that a table has been
+ * chosen to be update.
+ *
+ * @access public
+ * @param string the table to update data on
+ * @return bool
+ */
+ protected function _validate_update($table = '')
+ {
+ if (count($this->qb_set) == 0)
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
+ }
+
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+ }
+ else
+ {
+ $this->qb_from[0] = $table;
+ }
+
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update_Batch
+ *
+ * Compiles an update string and runs the query
+ *
+ * @param string the table to retrieve the results from
+ * @param array an associative array of update values
+ * @param string the where key
+ * @return bool
+ */
+ public function update_batch($table = '', $set = NULL, $index = NULL)
+ {
+ // Combine any cached components with the current statements
+ $this->_merge_cache();
+
+ if (is_null($index))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_use_index') : FALSE;
+ }
+
+ if ( ! is_null($set))
+ {
+ $this->set_update_batch($set, $index);
+ }
+
+ if (count($this->qb_set) === 0)
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
+ }
+
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+
+ $table = $this->qb_from[0];
+ }
+
+ // Batch this baby
+ for ($i = 0, $total = count($this->qb_set); $i < $total; $i += 100)
+ {
+ $this->query($this->_update_batch($this->_protect_identifiers($table, TRUE, NULL, FALSE), array_slice($this->qb_set, $i, 100), $this->_protect_identifiers($index), $this->qb_where));
+ }
+
+ $this->_reset_write();
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * The "set_update_batch" function. Allows key/value pairs to be set for batch updating
+ *
+ * @param array
+ * @param string
+ * @param boolean
+ * @return object
+ */
+ public function set_update_batch($key, $index = '', $escape = TRUE)
+ {
+ $key = $this->_object_to_array_batch($key);
+
+ if ( ! is_array($key))
+ {
+ // @todo error
+ }
+
+ foreach ($key as $k => $v)
+ {
+ $index_set = FALSE;
+ $clean = array();
+ foreach ($v as $k2 => $v2)
+ {
+ if ($k2 == $index)
+ {
+ $index_set = TRUE;
+ }
+ else
+ {
+ $not[] = $k.'-'.$v;
+ }
+
+ $clean[$this->_protect_identifiers($k2)] = ($escape === FALSE) ? $v2 : $this->escape($v2);
+ }
+
+ if ($index_set == FALSE)
+ {
+ return $this->display_error('db_batch_missing_index');
+ }
+
+ $this->qb_set[] = $clean;
+ }
+
+ return $this;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Empty Table
+ *
+ * Compiles a delete string and runs "DELETE FROM table"
+ *
+ * @param string the table to empty
+ * @return object
+ */
+ public function empty_table($table = '')
+ {
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+
+ $table = $this->qb_from[0];
+ }
+ else
+ {
+ $table = $this->_protect_identifiers($table, TRUE, NULL, FALSE);
+ }
+
+ $sql = $this->_delete($table);
+ $this->_reset_write();
+ return $this->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate
+ *
+ * Compiles a truncate string and runs the query
+ * If the database does not support the truncate() command
+ * This function maps to "DELETE FROM table"
+ *
+ * @param string the table to truncate
+ * @return object
+ */
+ public function truncate($table = '')
+ {
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+
+ $table = $this->qb_from[0];
+ }
+ else
+ {
+ $table = $this->_protect_identifiers($table, TRUE, NULL, FALSE);
+ }
+
+ $sql = $this->_truncate($table);
+ $this->_reset_write();
+ return $this->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Get DELETE query string
+ *
+ * Compiles a delete query string and returns the sql
+ *
+ * @access public
+ * @param string the table to delete from
+ * @param boolean TRUE: reset AR values; FALSE: leave AR values alone
+ * @return string
+ */
+ public function get_compiled_delete($table = '', $reset = TRUE)
+ {
+ $this->return_delete_sql = TRUE;
+ $sql = $this->delete($table, '', NULL, $reset);
+ $this->return_delete_sql = FALSE;
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete
+ *
+ * Compiles a delete string and runs the query
+ *
+ * @param mixed the table(s) to delete from. String or array
+ * @param mixed the where clause
+ * @param mixed the limit clause
+ * @param boolean
+ * @return object
+ */
+ public function delete($table = '', $where = '', $limit = NULL, $reset_data = TRUE)
+ {
+ // Combine any cached components with the current statements
+ $this->_merge_cache();
+
+ if ($table == '')
+ {
+ if ( ! isset($this->qb_from[0]))
+ {
+ return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
+ }
+
+ $table = $this->qb_from[0];
+ }
+ elseif (is_array($table))
+ {
+ foreach ($table as $single_table)
+ {
+ $this->delete($single_table, $where, $limit, FALSE);
+ }
+
+ $this->_reset_write();
+ return;
+ }
+ else
+ {
+ $table = $this->_protect_identifiers($table, TRUE, NULL, FALSE);
+ }
+
+ if ($where != '')
+ {
+ $this->where($where);
+ }
+
+ if ($limit != NULL)
+ {
+ $this->limit($limit);
+ }
+
+ if (count($this->qb_where) === 0 && count($this->qb_wherein) === 0 && count($this->qb_like) === 0)
+ {
+ return ($this->db_debug) ? $this->display_error('db_del_must_use_where') : FALSE;
+ }
+
+ $sql = $this->_delete($table, $this->qb_where, $this->qb_like, $this->qb_limit);
+ if ($reset_data)
+ {
+ $this->_reset_write();
+ }
+
+ return ($this->return_delete_sql === TRUE) ? $sql : $this->query($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * DB Prefix
+ *
+ * Prepends a database prefix if one exists in configuration
+ *
+ * @param string the table
+ * @return string
+ */
+ public function dbprefix($table = '')
+ {
+ if ($table == '')
+ {
+ $this->display_error('db_table_name_required');
+ }
+
+ return $this->dbprefix.$table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set DB Prefix
+ *
+ * Set's the DB Prefix to something new without needing to reconnect
+ *
+ * @param string the prefix
+ * @return string
+ */
+ public function set_dbprefix($prefix = '')
+ {
+ return $this->dbprefix = $prefix;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Track Aliases
+ *
+ * Used to track SQL statements written with aliased tables.
+ *
+ * @param string The table to inspect
+ * @return string
+ */
+ protected function _track_aliases($table)
+ {
+ if (is_array($table))
+ {
+ foreach ($table as $t)
+ {
+ $this->_track_aliases($t);
+ }
+ return;
+ }
+
+ // Does the string contain a comma? If so, we need to separate
+ // the string into discreet statements
+ if (strpos($table, ',') !== FALSE)
+ {
+ return $this->_track_aliases(explode(',', $table));
+ }
+
+ // if a table alias is used we can recognize it by a space
+ if (strpos($table, ' ') !== FALSE)
+ {
+ // if the alias is written with the AS keyword, remove it
+ $table = preg_replace('/ AS /i', ' ', $table);
+
+ // Grab the alias
+ $table = trim(strrchr($table, ' '));
+
+ // Store the alias, if it doesn't already exist
+ if ( ! in_array($table, $this->qb_aliased_tables))
+ {
+ $this->qb_aliased_tables[] = $table;
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Compile the SELECT statement
+ *
+ * Generates a query string based on which functions were used.
+ * Should not be called directly. The get() function calls it.
+ *
+ * @return string
+ */
+ protected function _compile_select($select_override = FALSE)
+ {
+ // Combine any cached components with the current statements
+ $this->_merge_cache();
+
+ // Write the "select" portion of the query
+ if ($select_override !== FALSE)
+ {
+ $sql = $select_override;
+ }
+ else
+ {
+ $sql = ( ! $this->qb_distinct) ? 'SELECT ' : 'SELECT DISTINCT ';
+
+ if (count($this->qb_select) === 0)
+ {
+ $sql .= '*';
+ }
+ else
+ {
+ // Cycle through the "select" portion of the query and prep each column name.
+ // The reason we protect identifiers here rather then in the select() function
+ // is because until the user calls the from() function we don't know if there are aliases
+ foreach ($this->qb_select as $key => $val)
+ {
+ $no_escape = isset($this->qb_no_escape[$key]) ? $this->qb_no_escape[$key] : NULL;
+ $this->qb_select[$key] = $this->_protect_identifiers($val, FALSE, $no_escape);
+ }
+
+ $sql .= implode(', ', $this->qb_select);
+ }
+ }
+
+ // Write the "FROM" portion of the query
+ if (count($this->qb_from) > 0)
+ {
+ $sql .= "\nFROM ".$this->_from_tables($this->qb_from);
+ }
+
+ // Write the "JOIN" portion of the query
+ if (count($this->qb_join) > 0)
+ {
+ $sql .= "\n".implode("\n", $this->qb_join);
+ }
+
+ // Write the "WHERE" portion of the query
+ if (count($this->qb_where) > 0 OR count($this->qb_like) > 0)
+ {
+ $sql .= "\nWHERE ";
+ }
+
+ $sql .= implode("\n", $this->qb_where);
+
+ // Write the "LIKE" portion of the query
+ if (count($this->qb_like) > 0)
+ {
+ if (count($this->qb_where) > 0)
+ {
+ $sql .= "\nAND ";
+ }
+
+ $sql .= implode("\n", $this->qb_like);
+ }
+
+ // Write the "GROUP BY" portion of the query
+ if (count($this->qb_groupby) > 0)
+ {
+ $sql .= "\nGROUP BY ".implode(', ', $this->qb_groupby);
+ }
+
+ // Write the "HAVING" portion of the query
+ if (count($this->qb_having) > 0)
+ {
+ $sql .= "\nHAVING ".implode("\n", $this->qb_having);
+ }
+
+ // Write the "ORDER BY" portion of the query
+ if (count($this->qb_orderby) > 0)
+ {
+ $sql .= "\nORDER BY ".implode(', ', $this->qb_orderby);
+ if ($this->qb_order !== FALSE)
+ {
+ $sql .= ($this->qb_order == 'desc') ? ' DESC' : ' ASC';
+ }
+ }
+
+ // Write the "LIMIT" portion of the query
+ if (is_numeric($this->qb_limit))
+ {
+ return $this->_limit($sql."\n", $this->qb_limit, $this->qb_offset);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Object to Array
+ *
+ * Takes an object as input and converts the class variables to array key/vals
+ *
+ * @param object
+ * @return array
+ */
+ public function _object_to_array($object)
+ {
+ if ( ! is_object($object))
+ {
+ return $object;
+ }
+
+ $array = array();
+ foreach (get_object_vars($object) as $key => $val)
+ {
+ // There are some built in keys we need to ignore for this conversion
+ if ( ! is_object($val) && ! is_array($val) && $key != '_parent_name')
+ {
+ $array[$key] = $val;
+ }
+ }
+
+ return $array;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Object to Array
+ *
+ * Takes an object as input and converts the class variables to array key/vals
+ *
+ * @param object
+ * @return array
+ */
+ public function _object_to_array_batch($object)
+ {
+ if ( ! is_object($object))
+ {
+ return $object;
+ }
+
+ $array = array();
+ $out = get_object_vars($object);
+ $fields = array_keys($out);
+
+ foreach ($fields as $val)
+ {
+ // There are some built in keys we need to ignore for this conversion
+ if ($val !== '_parent_name')
+ {
+ $i = 0;
+ foreach ($out[$val] as $data)
+ {
+ $array[$i++][$val] = $data;
+ }
+ }
+ }
+
+ return $array;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Start Cache
+ *
+ * Starts AR caching
+ *
+ * @return void
+ */
+ public function start_cache()
+ {
+ $this->qb_caching = TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Stop Cache
+ *
+ * Stops AR caching
+ *
+ * @return void
+ */
+ public function stop_cache()
+ {
+ $this->qb_caching = FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Flush Cache
+ *
+ * Empties the AR cache
+ *
+ * @access public
+ * @return void
+ */
+ public function flush_cache()
+ {
+ $this->_reset_run(array(
+ 'ar_cache_select' => array(),
+ 'ar_cache_from' => array(),
+ 'ar_cache_join' => array(),
+ 'ar_cache_where' => array(),
+ 'ar_cache_like' => array(),
+ 'ar_cache_groupby' => array(),
+ 'ar_cache_having' => array(),
+ 'ar_cache_orderby' => array(),
+ 'ar_cache_set' => array(),
+ 'ar_cache_exists' => array(),
+ 'ar_cache_no_escape' => array()
+ ));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Merge Cache
+ *
+ * When called, this function merges any cached AR arrays with
+ * locally called ones.
+ *
+ * @return void
+ */
+ protected function _merge_cache()
+ {
+ if (count($this->qb_cache_exists) === 0)
+ {
+ return;
+ }
+
+ foreach ($this->qb_cache_exists as $val)
+ {
+ $qb_variable = 'ar_'.$val;
+ $qb_cache_var = 'ar_cache_'.$val;
+
+ if (count($this->$qb_cache_var) === 0)
+ {
+ continue;
+ }
+
+ $this->$qb_variable = array_unique(array_merge($this->$qb_cache_var, $this->$qb_variable));
+ }
+
+ // If we are "protecting identifiers" we need to examine the "from"
+ // portion of the query to determine if there are any aliases
+ if ($this->_protect_identifiers === TRUE AND count($this->qb_cache_from) > 0)
+ {
+ $this->_track_aliases($this->qb_from);
+ }
+
+ $this->qb_no_escape = $this->qb_cache_no_escape;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Reset Query Builder values.
+ *
+ * Publicly-visible method to reset the AR values.
+ *
+ * @return void
+ */
+ public function reset_query()
+ {
+ $this->_reset_select();
+ $this->_reset_write();
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Resets the query builder values. Called by the get() function
+ *
+ * @param array An array of fields to reset
+ * @return void
+ */
+ protected function _reset_run($qb_reset_items)
+ {
+ foreach ($qb_reset_items as $item => $default_value)
+ {
+ if ( ! in_array($item, $this->qb_store_array))
+ {
+ $this->$item = $default_value;
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Resets the query builder values. Called by the get() function
+ *
+ * @return void
+ */
+ protected function _reset_select()
+ {
+ $this->_reset_run(array(
+ 'ar_select' => array(),
+ 'ar_from' => array(),
+ 'ar_join' => array(),
+ 'ar_where' => array(),
+ 'ar_like' => array(),
+ 'ar_groupby' => array(),
+ 'ar_having' => array(),
+ 'ar_orderby' => array(),
+ 'ar_wherein' => array(),
+ 'ar_aliased_tables' => array(),
+ 'ar_no_escape' => array(),
+ 'ar_distinct' => FALSE,
+ 'ar_limit' => FALSE,
+ 'ar_offset' => FALSE,
+ 'ar_order' => FALSE
+ )
+ );
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Resets the query builder "write" values.
+ *
+ * Called by the insert() update() insert_batch() update_batch() and delete() functions
+ *
+ * @return void
+ */
+ protected function _reset_write()
+ {
+ $this->_reset_run(array(
+ 'ar_set' => array(),
+ 'ar_from' => array(),
+ 'ar_where' => array(),
+ 'ar_like' => array(),
+ 'ar_orderby' => array(),
+ 'ar_keys' => array(),
+ 'ar_limit' => FALSE,
+ 'ar_order' => FALSE
+ )
+ );
+ }
+
+}
+
+/* End of file DB_query_builder.php */
+/* Location: ./system/database/DB_query_builder.php */