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authorAndrey Andreev <narf@bofh.bg>2012-05-02 12:27:30 +0200
committerAndrey Andreev <narf@bofh.bg>2012-05-02 12:27:30 +0200
commit14aa3178e12f285bed006511902e50aaae69bada (patch)
treea33410e21a5de095070fc5cc6d14b2649954e0a7 /system/database/drivers/mssql/mssql_driver.php
parent3ea6b1fd8fb0492d84c4879e039d11713c9f39a5 (diff)
parent963c96c5507ceb8b5c3de50d0ab959d21dcc8cd1 (diff)
Merge upstream branch
Diffstat (limited to 'system/database/drivers/mssql/mssql_driver.php')
-rw-r--r--system/database/drivers/mssql/mssql_driver.php122
1 files changed, 28 insertions, 94 deletions
diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index 912808631..f60ec8168 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -29,7 +29,7 @@
* MS SQL Database Adapter Class
*
* Note: _DB is an extender class that the app controller
- * creates dynamically based on whether the active record
+ * creates dynamically based on whether the query builder
* class is being used or not.
*
* @package CodeIgniter
@@ -52,10 +52,10 @@ class CI_DB_mssql_driver extends CI_DB {
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
- * used for the count_all() and count_all_results() functions.
+ * used for the count_all() and count_all_results() methods.
*/
protected $_count_string = 'SELECT COUNT(*) AS ';
- protected $_random_keyword = ' ASC'; // not currently supported
+ protected $_random_keyword = ' NEWID()';
/**
* Non-persistent database connection
@@ -404,47 +404,6 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
- *
- * This function escapes column and table names
- *
- * @param string
- * @return string
- */
- public function _escape_identifiers($item)
- {
- if ($this->_escape_char == '')
- {
- return $item;
- }
-
- foreach ($this->_reserved_identifiers as $id)
- {
- if (strpos($item, '.'.$id) !== FALSE)
- {
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
- }
-
- if (strpos($item, '.') !== FALSE)
- {
- $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
- }
- else
- {
- $str = $this->_escape_char.$item.$this->_escape_char;
- }
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
-
- // --------------------------------------------------------------------
-
- /**
* From Tables
*
* This function implicitly groups FROM tables so there is no confusion
@@ -466,23 +425,6 @@ class CI_DB_mssql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Insert statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- protected function _insert($table, $keys, $values)
- {
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
- }
-
- // --------------------------------------------------------------------
-
- /**
* Update statement
*
* Generates a platform-specific update string from the supplied data
@@ -490,46 +432,44 @@ class CI_DB_mssql_driver extends CI_DB {
* @param string the table name
* @param array the update data
* @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
+ * @param array the orderby clause (ignored)
+ * @param array the limit clause (ignored)
+ * @param array the like clause
* @return string
*/
- protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+ protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
{
- foreach ($values as $key => $val)
+ foreach($values as $key => $val)
{
- $valstr[] = $key." = ".$val;
+ $valstr[] = $key.' = '.$val;
}
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
+ $where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
- $sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
- $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
- $sql .= $orderby.$limit;
+ if ( ! empty($like))
+ {
+ $where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+ }
- return $sql;
+ return 'UPDATE '.$table.' SET '.implode(', ', $valstr).' WHERE '.$where;
}
-
// --------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
+ *
+ * If the database does not support the truncate() command,
+ * then this method maps to 'DELETE FROM table'
*
* @param string the table name
* @return string
*/
protected function _truncate($table)
{
- return "TRUNCATE ".$table;
+ return 'TRUNCATE TABLE '.$table;
}
// --------------------------------------------------------------------
@@ -541,28 +481,22 @@ class CI_DB_mssql_driver extends CI_DB {
*
* @param string the table name
* @param array the where clause
+ * @param array the like clause
* @param string the limit clause
* @return string
*/
protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
- $conditions = '';
-
- if (count($where) > 0 OR count($like) > 0)
- {
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->ar_where);
+ $conditions = array();
- if (count($where) > 0 && count($like) > 0)
- {
- $conditions .= " AND ";
- }
- $conditions .= implode("\n", $like);
- }
+ empty($where) OR $conditions[] = implode(' ', $where);
+ empty($like) OR $conditions[] = implode(' ', $like);
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
+ $conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
- return "DELETE FROM ".$table.$conditions.$limit;
+ return ($limit)
+ ? 'WITH ci_delete AS (SELECT TOP '.$limit.' * FROM '.$table.$conditions.') DELETE FROM ci_delete'
+ : 'DELETE FROM '.$table.$conditions;
}
// --------------------------------------------------------------------
@@ -600,4 +534,4 @@ class CI_DB_mssql_driver extends CI_DB {
}
/* End of file mssql_driver.php */
-/* Location: ./system/database/drivers/mssql/mssql_driver.php */ \ No newline at end of file
+/* Location: ./system/database/drivers/mssql/mssql_driver.php */