From 98e46cf96447a2a6448d8dc984948a8694dbf747 Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Tue, 13 Nov 2012 03:01:42 +0200 Subject: Add seed values support for Query Builder order_by (feature request #1987) --- .../drivers/pdo/subdrivers/pdo_cubrid_driver.php | 7 ++++ .../drivers/pdo/subdrivers/pdo_dblib_driver.php | 4 +-- .../drivers/pdo/subdrivers/pdo_firebird_driver.php | 4 +-- .../drivers/pdo/subdrivers/pdo_informix_driver.php | 9 +++++ .../drivers/pdo/subdrivers/pdo_oci_driver.php | 4 +-- .../drivers/pdo/subdrivers/pdo_odbc_driver.php | 7 ++++ .../drivers/pdo/subdrivers/pdo_pgsql_driver.php | 39 ++++++++++++++++++++-- .../drivers/pdo/subdrivers/pdo_sqlite_driver.php | 2 +- .../drivers/pdo/subdrivers/pdo_sqlsrv_driver.php | 4 +-- 9 files changed, 69 insertions(+), 11 deletions(-) (limited to 'system/database/drivers/pdo/subdrivers') diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php index 4f762b91c..5a87cf0c7 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php @@ -55,6 +55,13 @@ class CI_DB_pdo_cubrid_driver extends CI_DB_pdo_driver { */ protected $_escape_char = '`'; + /** + * ORDER BY random keyword + * + * @var array + */ + protected $_random_keyword = array('RANDOM()', 'RANDOM(%d)'); + // -------------------------------------------------------------------- /** diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php index 7121819ec..a44fd3afc 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php @@ -53,9 +53,9 @@ class CI_DB_pdo_dblib_driver extends CI_DB_pdo_driver { /** * ORDER BY random keyword * - * @var string + * @var array */ - protected $_random_keyword = ' NEWID()'; + protected $_random_keyword = array('NEWID()', 'RAND(%d)'); /** * Quoted identifier flag diff --git a/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php index 83b9648c1..7c3836691 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php @@ -53,9 +53,9 @@ class CI_DB_pdo_firebird_driver extends CI_DB_pdo_driver { /** * ORDER BY random keyword * - * @var string + * @var array */ - protected $_random_keyword = ' RANDOM()'; + protected $_random_keyword = array('RAND()', 'RAND()'); // -------------------------------------------------------------------- diff --git a/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php index 8998670e1..03886f442 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php @@ -50,6 +50,15 @@ class CI_DB_pdo_informix_driver extends CI_DB_pdo_driver { // -------------------------------------------------------------------- + /** + * ORDER BY random keyword + * + * @var array + */ + protected $_random_keyword = array('ASC', 'ASC'); // Currently not supported + + // -------------------------------------------------------------------- + /** * Class constructor * diff --git a/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php index e1beb3683..051b7dec8 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php @@ -62,9 +62,9 @@ class CI_DB_pdo_oci_driver extends CI_DB_pdo_driver { /** * ORDER BY random keyword * - * @var string + * @var array */ - protected $_random_keyword = ' ASC'; // Currently not supported + protected $_random_keyword = array('ASC', 'ASC'); // Currently not supported /** * COUNT string diff --git a/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php index f6e0e215a..05b34fa89 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php @@ -73,6 +73,13 @@ class CI_DB_pdo_odbc_driver extends CI_DB_pdo_driver { */ protected $_like_escape_str = " {escape '%s'} "; + /** + * ORDER BY random keyword + * + * @var array + */ + protected $_random_keyword = array('RND()', 'RND(%d)'); + // -------------------------------------------------------------------- /** diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php index c3f5b7603..45165213f 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php @@ -60,9 +60,9 @@ class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver { /** * ORDER BY random keyword * - * @var string + * @var array */ - protected $_random_keyword = ' RANDOM()'; + protected $_random_keyword = array('RANDOM()', 'RANDOM()'); // -------------------------------------------------------------------- @@ -109,6 +109,41 @@ class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver { // -------------------------------------------------------------------- + /** + * ORDER BY + * + * @param string $orderby + * @param string $direction ASC or DESC + * @param bool $escape + * @return object + */ + public function order_by($orderby, $direction = '', $escape = NULL) + { + $direction = strtoupper(trim($direction)); + if ($direction === 'RANDOM') + { + if ( ! is_float($orderby) && ctype_digit((string) $orderby)) + { + $orderby = ($orderby > 1) + ? (float) '0.'.$orderby + : (float) $orderby; + } + + if (is_float($orderby)) + { + $this->simple_query('SET SEED '.$orderby); + } + + $orderby = $this->_random_keyword[0]; + $direction = ''; + $escape = FALSE; + } + + return parent::order_by($orderby, $direction, $escape); + } + + // -------------------------------------------------------------------- + /** * Show table query * diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php index b24b13e76..f9d186f6c 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php @@ -53,7 +53,7 @@ class CI_DB_pdo_sqlite_driver extends CI_DB_pdo_driver { /** * ORDER BY random keyword * - * @var string + * @var array */ protected $_random_keyword = ' RANDOM()'; diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php index 7bb7f8806..1a630729d 100644 --- a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php +++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php @@ -53,9 +53,9 @@ class CI_DB_pdo_sqlsrv_driver extends CI_DB_pdo_driver { /** * ORDER BY random keyword * - * @var string + * @var array */ - protected $_random_keyword = ' NEWID()'; + protected $_random_keyword = array('NEWID()', 'RAND(%d)'); /** * Quoted identifier flag -- cgit v1.2.3-24-g4f1b