added Regexp operator compatibility for mysql and pgsql drivers

Doctrine/Connection.php

@@ -126,6 +126,15 @@ abstract class Doctrine_Connection extends Doctrine_Configurable implements Coun
     public function getDBH() {
         return $this->dbh;
     }
+    /**
+     * returns the regular expression operator 
+     * (implemented by the connection drivers)
+     *
+     * @return string
+     */
+    public function getRegexpOperator() {
+        throw new Doctrine_Connection_Exception('Regular expression operator is not supported by this database driver.');                                    	
+    }
     /**
      * query
      * queries the database with Doctrine Query Language

Doctrine/Connection/Mysql.php

@@ -14,10 +14,20 @@ class Doctrine_Connection_Mysql extends Doctrine_Connection_Common {
         $this->setAttribute(Doctrine::ATTR_QUERY_LIMIT, Doctrine::LIMIT_ROWS);
         parent::__construct($manager,$pdo);
     }    
+    /**
+     * returns the regular expression operator 
+     * (implemented by the connection drivers)
+     *
+     * @return string
+     */
+    public function getRegexpOperator() {
+        return 'RLIKE';
+    }
     /**
      * deletes all data access object from the collection
      * @param Doctrine_Collection $coll
      */
+
      /**
     public function deleteCollection(Doctrine_Collection $coll) {
 

Doctrine/Connection/Pgsql.php

@@ -14,5 +14,14 @@ class Doctrine_Connection_Pgsql extends Doctrine_Connection_Common {
         $data = $stmt->fetch(PDO::FETCH_NUM);
         return $data[0];
     }
+    /**
+     * returns the regular expression operator 
+     * (implemented by the connection drivers)
+     *
+     * @return string
+     */
+    public function getRegexpOperator() {
+        return 'SIMILAR TO';
+    }
 }
 

Doctrine/Query/Where.php

@@ -48,10 +48,11 @@ class Doctrine_Query_Where extends Doctrine_Query_Condition {
                 $stack      = $this->query->getTableStack();
 
                 switch($func) {
-                    case 'contains':  
-                    
-                    case 'similarTo': 
-                    case 'isLike':   
+                    case 'contains':
+                        $operator = ' = ';
+                    case 'regexp':
+                        $operator = ' RLIKE ';
+                    case 'like':
                         if(empty($relation))
                             throw new Doctrine_Query_Exception('DQL function contains can only be used for fields of related components');