141 lines
2.7 KiB
PHP
141 lines
2.7 KiB
PHP
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<?php defined('SYSPATH') OR die('No direct script access.');
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/**
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* Database query builder for UPDATE statements. See [Query Builder](/database/query/builder) for usage and examples.
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*
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* @package Kohana/Database
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* @category Query
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* @author Kohana Team
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* @copyright (c) 2008-2009 Kohana Team
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* @license http://kohanaphp.com/license
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*/
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class Kohana_Database_Query_Builder_Update extends Database_Query_Builder_Where {
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// UPDATE ...
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protected $_table;
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// SET ...
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protected $_set = array();
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/**
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* Set the table for a update.
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*
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* @param mixed $table table name or array($table, $alias) or object
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* @return void
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*/
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public function __construct($table = NULL)
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{
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if ($table)
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{
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// Set the inital table name
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$this->_table = $table;
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}
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// Start the query with no SQL
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return parent::__construct(Database::UPDATE, '');
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}
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/**
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* Sets the table to update.
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*
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* @param mixed $table table name or array($table, $alias) or object
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* @return $this
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*/
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public function table($table)
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{
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$this->_table = $table;
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return $this;
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}
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/**
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* Set the values to update with an associative array.
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*
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* @param array $pairs associative (column => value) list
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* @return $this
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*/
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public function set(array $pairs)
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{
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foreach ($pairs as $column => $value)
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{
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$this->_set[] = array($column, $value);
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}
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return $this;
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}
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/**
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* Set the value of a single column.
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*
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* @param mixed $column table name or array($table, $alias) or object
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* @param mixed $value column value
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* @return $this
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*/
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public function value($column, $value)
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{
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$this->_set[] = array($column, $value);
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return $this;
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}
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/**
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* Compile the SQL query and return it.
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*
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* @param mixed $db Database instance or name of instance
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* @return string
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*/
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public function compile($db = NULL)
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{
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if ( ! is_object($db))
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{
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// Get the database instance
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$db = Database::instance($db);
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}
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// Start an update query
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$query = 'UPDATE '.$db->quote_table($this->_table);
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// Add the columns to update
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$query .= ' SET '.$this->_compile_set($db, $this->_set);
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if ( ! empty($this->_where))
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{
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// Add selection conditions
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$query .= ' WHERE '.$this->_compile_conditions($db, $this->_where);
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}
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if ( ! empty($this->_order_by))
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{
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// Add sorting
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$query .= ' '.$this->_compile_order_by($db, $this->_order_by);
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}
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if ($this->_limit !== NULL)
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{
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// Add limiting
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$query .= ' LIMIT '.$this->_limit;
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}
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$this->_sql = $query;
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return parent::compile($db);
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}
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public function reset()
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{
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$this->_table = NULL;
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$this->_set =
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$this->_where = array();
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$this->_limit = NULL;
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$this->_parameters = array();
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$this->_sql = NULL;
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return $this;
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}
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} // End Database_Query_Builder_Update
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