/usr/share/php/kohana3.1/modules/database/classes/kohana/database/query/builder/select.php is in libkohana3.1-mod-database-php 3.1.5-1.1.
This file is owned by root:root, with mode 0o644.
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/**
* Database query builder for SELECT statements. See [Query Builder](/database/query/builder) for usage and examples.
*
* @package Kohana/Database
* @category Query
* @author Kohana Team
* @copyright (c) 2008-2009 Kohana Team
* @license http://kohanaphp.com/license
*/
class Kohana_Database_Query_Builder_Select extends Database_Query_Builder_Where {
// SELECT ...
protected $_select = array();
// DISTINCT
protected $_distinct = FALSE;
// FROM ...
protected $_from = array();
// JOIN ...
protected $_join = array();
// GROUP BY ...
protected $_group_by = array();
// HAVING ...
protected $_having = array();
// OFFSET ...
protected $_offset = NULL;
// UNION ...
protected $_union = array();
// The last JOIN statement created
protected $_last_join;
/**
* Sets the initial columns to select from.
*
* @param array $columns column list
* @return void
*/
public function __construct(array $columns = NULL)
{
if ( ! empty($columns))
{
// Set the initial columns
$this->_select = $columns;
}
// Start the query with no actual SQL statement
parent::__construct(Database::SELECT, '');
}
/**
* Enables or disables selecting only unique columns using "SELECT DISTINCT"
*
* @param boolean $value enable or disable distinct columns
* @return $this
*/
public function distinct($value)
{
$this->_distinct = (bool) $value;
return $this;
}
/**
* Choose the columns to select from.
*
* @param mixed $columns column name or array($column, $alias) or object
* @return $this
*/
public function select($columns = NULL)
{
$columns = func_get_args();
$this->_select = array_merge($this->_select, $columns);
return $this;
}
/**
* Choose the columns to select from, using an array.
*
* @param array $columns list of column names or aliases
* @return $this
*/
public function select_array(array $columns)
{
$this->_select = array_merge($this->_select, $columns);
return $this;
}
/**
* Choose the tables to select "FROM ..."
*
* @param mixed $table table name or array($table, $alias) or object
* @return $this
*/
public function from($tables)
{
$tables = func_get_args();
$this->_from = array_merge($this->_from, $tables);
return $this;
}
/**
* Adds addition tables to "JOIN ...".
*
* @param mixed $table column name or array($column, $alias) or object
* @param string $type join type (LEFT, RIGHT, INNER, etc)
* @return $this
*/
public function join($table, $type = NULL)
{
$this->_join[] = $this->_last_join = new Database_Query_Builder_Join($table, $type);
return $this;
}
/**
* Adds "ON ..." conditions for the last created JOIN statement.
*
* @param mixed $c1 column name or array($column, $alias) or object
* @param string $op logic operator
* @param mixed $c2 column name or array($column, $alias) or object
* @return $this
*/
public function on($c1, $op, $c2)
{
$this->_last_join->on($c1, $op, $c2);
return $this;
}
/**
* Adds "USING ..." conditions for the last created JOIN statement.
*
* @param string $columns column name
* @return $this
*/
public function using($columns)
{
$columns = func_get_args();
call_user_func_array(array($this->_last_join, 'using'), $columns);
return $this;
}
/**
* Creates a "GROUP BY ..." filter.
*
* @param mixed $columns column name or array($column, $alias) or object
* @return $this
*/
public function group_by($columns)
{
$columns = func_get_args();
$this->_group_by = array_merge($this->_group_by, $columns);
return $this;
}
/**
* Alias of and_having()
*
* @param mixed $column column name or array($column, $alias) or object
* @param string $op logic operator
* @param mixed $value column value
* @return $this
*/
public function having($column, $op, $value = NULL)
{
return $this->and_having($column, $op, $value);
}
/**
* Creates a new "AND HAVING" condition for the query.
*
* @param mixed $column column name or array($column, $alias) or object
* @param string $op logic operator
* @param mixed $value column value
* @return $this
*/
public function and_having($column, $op, $value = NULL)
{
$this->_having[] = array('AND' => array($column, $op, $value));
return $this;
}
/**
* Creates a new "OR HAVING" condition for the query.
*
* @param mixed $column column name or array($column, $alias) or object
* @param string $op logic operator
* @param mixed $value column value
* @return $this
*/
public function or_having($column, $op, $value = NULL)
{
$this->_having[] = array('OR' => array($column, $op, $value));
return $this;
}
/**
* Alias of and_having_open()
*
* @return $this
*/
public function having_open()
{
return $this->and_having_open();
}
/**
* Opens a new "AND HAVING (...)" grouping.
*
* @return $this
*/
public function and_having_open()
{
$this->_having[] = array('AND' => '(');
return $this;
}
/**
* Opens a new "OR HAVING (...)" grouping.
*
* @return $this
*/
public function or_having_open()
{
$this->_having[] = array('OR' => '(');
return $this;
}
/**
* Closes an open "AND HAVING (...)" grouping.
*
* @return $this
*/
public function having_close()
{
return $this->and_having_close();
}
/**
* Closes an open "AND HAVING (...)" grouping.
*
* @return $this
*/
public function and_having_close()
{
$this->_having[] = array('AND' => ')');
return $this;
}
/**
* Closes an open "OR HAVING (...)" grouping.
*
* @return $this
*/
public function or_having_close()
{
$this->_having[] = array('OR' => ')');
return $this;
}
/**
* Adds an other UNION clause.
*
* @param mixed $select if string, it must be the name of a table. Else
* must be an instance of Database_Query_Builder_Select
* @param boolean $all decides if it's an UNION or UNION ALL clause
* @return $this
*/
public function union($select, $all = TRUE)
{
if (is_string($select))
{
$select = DB::select()->from($select);
}
if ( ! $select instanceof Database_Query_Builder_Select)
throw new Kohana_Exception('first parameter must be a string or an instance of Database_Query_Builder_Select');
$this->_union []= array('select' => $select, 'all' => $all);
return $this;
}
/**
* Start returning results after "OFFSET ..."
*
* @param integer $number starting result number
* @return $this
*/
public function offset($number)
{
$this->_offset = (int) $number;
return $this;
}
/**
* Compile the SQL query and return it.
*
* @param object $db Database instance
* @return string
*/
public function compile(Database $db)
{
// Callback to quote columns
$quote_column = array($db, 'quote_column');
// Callback to quote tables
$quote_table = array($db, 'quote_table');
// Start a selection query
$query = 'SELECT ';
if ($this->_distinct === TRUE)
{
// Select only unique results
$query .= 'DISTINCT ';
}
if (empty($this->_select))
{
// Select all columns
$query .= '*';
}
else
{
// Select all columns
$query .= implode(', ', array_unique(array_map($quote_column, $this->_select)));
}
if ( ! empty($this->_from))
{
// Set tables to select from
$query .= ' FROM '.implode(', ', array_unique(array_map($quote_table, $this->_from)));
}
if ( ! empty($this->_join))
{
// Add tables to join
$query .= ' '.$this->_compile_join($db, $this->_join);
}
if ( ! empty($this->_where))
{
// Add selection conditions
$query .= ' WHERE '.$this->_compile_conditions($db, $this->_where);
}
if ( ! empty($this->_group_by))
{
// Add grouping
$query .= ' '.$this->_compile_group_by($db, $this->_group_by);
}
if ( ! empty($this->_having))
{
// Add filtering conditions
$query .= ' HAVING '.$this->_compile_conditions($db, $this->_having);
}
if ( ! empty($this->_order_by))
{
// Add sorting
$query .= ' '.$this->_compile_order_by($db, $this->_order_by);
}
if ($this->_limit !== NULL)
{
// Add limiting
$query .= ' LIMIT '.$this->_limit;
}
if ($this->_offset !== NULL)
{
// Add offsets
$query .= ' OFFSET '.$this->_offset;
}
if ( ! empty($this->_union))
{
foreach ($this->_union as $u) {
$query .= ' UNION ';
if ($u['all'] === TRUE)
{
$query .= 'ALL ';
}
$query .= $u['select']->compile($db);
}
}
$this->_sql = $query;
return parent::compile($db);
}
public function reset()
{
$this->_select =
$this->_from =
$this->_join =
$this->_where =
$this->_group_by =
$this->_having =
$this->_order_by =
$this->_union = array();
$this->_distinct = FALSE;
$this->_limit =
$this->_offset =
$this->_last_join = NULL;
$this->_parameters = array();
$this->_sql = NULL;
return $this;
}
} // End Database_Query_Select
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