diff options
Diffstat (limited to 'system/database/drivers/mssql/mssql_driver.php')
| -rw-r--r-- | system/database/drivers/mssql/mssql_driver.php | 112 |
1 files changed, 26 insertions, 86 deletions
diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php index 02b975ad2..fbc0701c0 100644 --- a/system/database/drivers/mssql/mssql_driver.php +++ b/system/database/drivers/mssql/mssql_driver.php @@ -30,6 +30,10 @@ */
class CI_DB_mssql_driver extends CI_DB {
+ var $dbdriver = 'mssql';
+
+ // The character used for escaping
+ var $_escape_char = '';
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
@@ -37,7 +41,6 @@ class CI_DB_mssql_driver extends CI_DB { */
var $_count_string = "SELECT COUNT(*) AS ";
var $_random_keyword = ' ASC'; // not currently supported
- var $dbdriver = 'mssql';
/**
* Non-persistent database connection
@@ -301,7 +304,7 @@ class CI_DB_mssql_driver extends CI_DB { if ($table == '')
return '0';
- $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows'). " FROM " . $this->_protect_identifiers($this->dbprefix.$table));
+ $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows'). " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
if ($query->num_rows() == 0)
return '0';
@@ -348,7 +351,7 @@ class CI_DB_mssql_driver extends CI_DB { */
function _list_columns($table = '')
{
- return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$this->_escape_table($table)."'";
+ return "SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = '".$table."'";
}
// --------------------------------------------------------------------
@@ -364,7 +367,7 @@ class CI_DB_mssql_driver extends CI_DB { */
function _field_data($table)
{
- return "SELECT TOP 1 * FROM ".$this->_escape_table($table);
+ return "SELECT TOP 1 * FROM ".$table;
}
// --------------------------------------------------------------------
@@ -398,99 +401,34 @@ class CI_DB_mssql_driver extends CI_DB { // --------------------------------------------------------------------
/**
- * Escape Column Name
- *
- * This function adds backticks around supplied column name
- *
- * @access private
- * @param string the column name
- * @return string
- */
- function _escape_column($column)
- {
- // Not necessary with MS SQL so we simply return the value
- return $column;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Escape Table Name
+ * Escape the SQL Identifiers
*
- * This function adds backticks if the table name has a period
- * in it. Some DBs will get cranky unless periods are escaped
+ * This function escapes column and table names
*
* @access private
- * @param string the table name
+ * @param string
* @return string
*/
- function _escape_table($table)
- {
- // Not necessary with MS SQL so we simply return the value
- return $table;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Protect Identifiers
- *
- * This function adds backticks if appropriate based on db type
- *
- * @access private
- * @param mixed the item(s)
- * @param boolean should spaces be backticked
- * @param boolean only affect the first word
- * @return mixed the item with backticks
- */
- function _protect_identifiers($item, $first_word_only = FALSE)
+ function _escape_identifiers($item)
{
- if (is_array($item))
+ if ($this->_escape_char == '')
{
- $escaped_array = array();
-
- foreach($item as $k=>$v)
- {
- $escaped_array[$this->_protect_identifiers($k)] = $this->_protect_identifiers($v, $first_word_only);
- }
-
- return $escaped_array;
- }
-
- // This function may get "item1 item2" as a string, and so
- // we may need ""item1" "item2"" and not ""item1 item2""
- if (ctype_alnum($item) === FALSE)
+ return $item;
+ }
+
+ if (strpos($item, '.') !== FALSE)
{
- if (strpos($item, '.') !== FALSE)
- {
- $aliased_tables = implode(".",$this->ar_aliased_tables).'.';
- $table_name = substr($item, 0, strpos($item, '.')+1);
- $item = (strpos($aliased_tables, $table_name) !== FALSE) ? $item = $item : $this->dbprefix.$item;
- }
-
- // This function may get "field >= 1", and need it to return ""field" >= 1"
- $lbound = ($first_word_only === TRUE) ? '' : '|\s|\(';
-
- $item = preg_replace('/(^'.$lbound.')([\w\d\-\_]+?)(\s|\)|$)/iS', '$1$2$3', $item);
+ $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
}
else
{
- return $item;
+ $str = $this->_escape_char.$item.$this->_escape_char;
}
-
- $exceptions = array('AS', '/', '-', '%', '+', '*', 'OR', 'IS');
- foreach ($exceptions as $exception)
- {
-
- if (stristr($item, " \"{$exception}\" ") !== FALSE)
- {
- $item = preg_replace('/ "('.preg_quote($exception).')" /i', ' $1 ', $item);
- }
- }
- return $item;
+ // remove duplicates if the user already included the escape
+ return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
}
-
+
// --------------------------------------------------------------------
/**
@@ -528,7 +466,7 @@ class CI_DB_mssql_driver extends CI_DB { */
function _insert($table, $keys, $values)
{
- return "INSERT INTO ".$this->_escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
}
// --------------------------------------------------------------------
@@ -557,8 +495,10 @@ class CI_DB_mssql_driver extends CI_DB { $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
- $sql = "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr);
+ $sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
+
$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
+
$sql .= $orderby.$limit;
return $sql;
@@ -580,7 +520,7 @@ class CI_DB_mssql_driver extends CI_DB { */
function _truncate($table)
{
- return "TRUNCATE ".$this->_escape_table($table);
+ return "TRUNCATE ".$table;
}
// --------------------------------------------------------------------
|