1 files changed, 26 insertions, 27 deletions

diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index b7c6b4e8e..10306d721 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -1118,31 +1118,19 @@ abstract class CI_DB_driver {
 	 * Generates a platform-specific update string from the supplied data
 	 *
 	 * @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 like clause
 	 * @return	string
 	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	protected function _update($table, $values)
 	{
 		foreach ($values as $key => $val)
 		{
 			$valstr[] = $key.' = '.$val;
 		}
 
-		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
-
-		if ( ! empty($like))
-		{
-			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
-		}
-
 		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
-			.$where
-			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
-			.($limit ? ' LIMIT '.$limit : '');
+			.$this->_compile_where()
+			.(empty($this->qb_orderby) ? '' : ' ORDER BY '.implode(', ', $this->qb_orderby))
+			.($this->qb_limit ? ' LIMIT '.(int) $this->qb_limit : '');
 	}
 
 	// --------------------------------------------------------------------
@@ -1155,7 +1143,7 @@ abstract class CI_DB_driver {
 	 */
 	protected function _has_operator($str)
 	{
-		return (bool) preg_match('/(\s|<|>|!|=|IS NULL|IS NOT NULL|BETWEEN)/i', trim($str));
+		return (bool) preg_match('/(<|>|!|=|\sIS NULL|\sIS NOT NULL|\sBETWEEN|\sLIKE|\sIN\s*\(|\s)/i', trim($str));
 	}
 
 	// --------------------------------------------------------------------
@@ -1169,18 +1157,29 @@ abstract class CI_DB_driver {
 	protected function _get_operator($str)
 	{
 		static $_operators = array(
-			'\s*(?:<|>|!)?=\s*',		// =, <=, >=, !=
-			'\s*<>?\s*',			// <, <>
-			'\s*>\s*',			// >
-			'\s+IS NULL',			// IS NULL
-			'\s+IS NOT NULL',		// IS NOT NULL
-			'\s+LIKE\s+',			// LIKE
-			'\s+NOT LIKE\s+',		// NOT LIKE
-			'\s+BETWEEN\s+\S+\s+AND\s+\S+',	// BETWEEN value AND value
-			'\s+IN\s*\([^\)]+\)',		// IN(list)
-			'\s+NOT IN\s*\([^\)]+\)'	// NOT IN (list)
+			'\s*(?:<|>|!)?=\s*',				// =, <=, >=, !=
+			'\s*<>?\s*',					// <, <>
+			'\s*>\s*',					// >
+			'\s+IS NULL',					// IS NULL
+			'\s+IS NOT NULL',				// IS NOT NULL
+			'\s+BETWEEN\s+\S+\s+AND\s+\S+',			// BETWEEN value AND value
+			'\s+IN\s*\([^\)]+\)',				// IN(list)
+			'\s+NOT IN\s*\([^\)]+\)'			// NOT IN (list)
+		);
+
+		static $_like = array(
+			'\s+LIKE\s+\S+',	// LIKE 'expr'
+			'\s+NOT LIKE\s+\S+',	// NOT LIKE 'expr'
 		);
 
+		if ($this->_like_escape_str !== '')
+		{
+			$_like[0] .= preg_quote(trim(sprintf($this->_like_escape_str, $this->_like_escape_chr)));
+			$_like[1] .= preg_quote(trim(sprintf($this->_like_escape_str, $this->_like_escape_chr)));
+		}
+
+		$_operators = array_merge($_operators, $_like);
+
 		return preg_match('/'.implode('|', $_operators).'/i', $str, $match)
 			? $match[0] : FALSE;
 	}