tweak the sql_like_expression feature a little bit to allow correct escaping

git-svn-id: file:///svn/phpbb/trunk@7789 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/includes/db/postgres.php

@@ -345,6 +345,15 @@ class dbal_postgres extends dbal
 		return @pg_escape_string($msg);
 	}
 
+	/**
+	* Build LIKE expression
+	* @access private
+	*/
+	function _sql_like_expression($expression)
+	{
+		return $expression;
+	}
+
 	/**
 	* return sql error array
 	* @access private