Modules

Kohana_Database_Query

This class is a transparent base class for Database_Query and should not be accessed directly.

Database query wrapper. See Parameterized Statements for usage and examples.

package
Kohana/Database
category
Query
author
Kohana Team
copyright
© 2008-2009 Kohana Team
license
https://kohana.top/license

Class declared in MODPATH/database/classes/Kohana/Database/Query.php on line 12.

Properties

protected $_as_object

Default value:
bool FALSE

protected $_force_execute

Default value:
bool FALSE

protected $_lifetime

Default value:
NULL

protected $_object_params

Default value:
array(0) 

protected $_parameters

Default value:
array(0) 

protected $_sql

Default value:
NULL

protected $_type

Default value:
NULL

Methods

public __construct( integer $type , string $sql ) (defined in Kohana_Database_Query)

Creates a new SQL query of the specified type.

Parameters

  • integer $type required - Query type: Database::SELECT, Database::INSERT, etc
  • string $sql required - Query string

Return Values

  • void

Source Code

public function __construct($type, $sql)
{
    $this->_type = $type;
    $this->_sql = $sql;
}

public __toString( ) (defined in Kohana_Database_Query)

Return the SQL query string.

Return Values

  • string

Source Code

public function __toString()
{
    try {
        // Return the SQL string
        return $this->compile(Database::instance());
    } catch (Exception $e) {
        return Kohana_Exception::text($e);
    }
}

public as_assoc( ) (defined in Kohana_Database_Query)

Returns results as associative arrays

Return Values

  • $this

Source Code

public function as_assoc()
{
    $this->_as_object = false;

    $this->_object_params = [];

    return $this;
}

public as_object( [ string $class = bool TRUE , array $params = NULL ] ) (defined in Kohana_Database_Query)

Returns results as objects

Parameters

  • string $class = bool TRUE - Classname or true for stdClass
  • array $params = NULL - $params

Return Values

  • $this

Source Code

public function as_object($class = true, array $params = null)
{
    $this->_as_object = $class;

    if ($params) {
        // Add object parameters
        $this->_object_params = $params;
    }

    return $this;
}

public bind( string $param , mixed & $var ) (defined in Kohana_Database_Query)

Bind a variable to a parameter in the query.

Parameters

  • string $param required - Parameter key to replace
  • byref mixed $var required - Variable to use

Return Values

  • $this

Source Code

public function bind($param, & $var)
{
    // Bind a value to a variable
    $this->_parameters[$param] = & $var;

    return $this;
}

public cached( [ integer $lifetime = NULL , boolean $force = bool FALSE ] ) (defined in Kohana_Database_Query)

Enables the query to be cached for a specified amount of time.

Parameters

  • integer $lifetime = NULL - Number of seconds to cache, 0 deletes it from the cache
  • boolean $force = bool FALSE - Whether or not to execute the query during a cache hit

Tags

Return Values

  • $this

Source Code

public function cached($lifetime = null, $force = false)
{
    if ($lifetime === null) {
        // Use the global setting
        $lifetime = Kohana::$cache_life;
    }

    $this->_force_execute = $force;
    $this->_lifetime = $lifetime;

    return $this;
}

public compile( [ mixed $db = NULL ] ) (defined in Kohana_Database_Query)

Compile the SQL query and return it. Replaces any parameters with their given values.

Parameters

  • mixed $db = NULL - Database instance or name of instance

Return Values

  • string

Source Code

public function compile($db = null)
{
    if (!is_object($db)) {
        // Get the database instance
        $db = Database::instance($db);
    }

    // Import the SQL locally
    $sql = $this->_sql;

    if (!empty($this->_parameters)) {
        // Quote all of the values
        $values = array_map([$db, 'quote'], $this->_parameters);

        // Replace the values in the SQL
        $sql = strtr($sql, $values);
    }

    return $sql;
}

public execute( [ mixed $db = NULL , string $as_object = NULL , array $object_params = NULL ] ) (defined in Kohana_Database_Query)

Execute the current query on the given database.

Parameters

  • mixed $db = NULL - Database instance or name of instance
  • string $as_object = NULL - Result object classname, true for stdClass or false for array
  • array $object_params = NULL - Result object constructor arguments

Return Values

  • object - Database_Result for SELECT queries
  • mixed - The insert id for INSERT queries
  • integer - Number of affected rows for all other queries

Source Code

public function execute($db = null, $as_object = null, $object_params = null)
{
    if (!is_object($db)) {
        // Get the database instance
        $db = Database::instance($db);
    }

    if ($as_object === null) {
        $as_object = $this->_as_object;
    }

    if ($object_params === null) {
        $object_params = $this->_object_params;
    }

    // Compile the SQL query
    $sql = $this->compile($db);

    if ($this->_lifetime !== null AND $this->_type === Database::SELECT) {
        // Set the cache key based on the database instance name and SQL
        $cache_key = 'Database::query("' . $db . '", "' . $sql . '")';

        // Read the cache first to delete a possible hit with lifetime <= 0
        if (($result = Kohana::cache($cache_key, null, $this->_lifetime)) !== null
            AND ! $this->_force_execute) {
            // Return a cached result
            return new Database_Result_Cached($result, $sql, $as_object, $object_params);
        }
    }

    // Execute the query
    $result = $db->query($this->_type, $sql, $as_object, $object_params);

    if (isset($cache_key) AND $this->_lifetime > 0) {
        // Cache the result array
        Kohana::cache($cache_key, $result->as_array(), $this->_lifetime);
    }

    return $result;
}

public param( string $param , mixed $value ) (defined in Kohana_Database_Query)

Set the value of a parameter in the query.

Parameters

  • string $param required - Parameter key to replace
  • mixed $value required - Value to use

Return Values

  • $this

Source Code

public function param($param, $value)
{
    // Add or overload a new parameter
    $this->_parameters[$param] = $value;

    return $this;
}

public parameters( array $params ) (defined in Kohana_Database_Query)

Add multiple parameters to the query.

Parameters

  • array $params required - List of parameters

Return Values

  • $this

Source Code

public function parameters(array $params)
{
    // Merge the new parameters in
    $this->_parameters = $params + $this->_parameters;

    return $this;
}

public type( ) (defined in Kohana_Database_Query)

Get the type of the query.

Return Values

  • integer

Source Code

public function type()
{
    return $this->_type;
}