Allow raw queries without parameters

This is useful for e.g. MySQL `LOCK TABLE` or SQLite `VACUUM` commands
which usually do not require parameters.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.markdown b/README.markdown
index 2e6e6b5..74ff2f0 100644
--- a/README.markdown
+++ b/README.markdown
@@ -297,7 +297,7 @@ The `join` methods also take an optional third parameter, which is an `alias` fo
 
 #### Raw queries ####
 
-If you need to perform more complex queries, you can completely specify the query to execute by using the `raw_query` method. This method takes a string and an array of parameters. The string should contain placeholders, either in question mark or named placeholder syntax, which will be used to bind the parameters to the query.
+If you need to perform more complex queries, you can completely specify the query to execute by using the `raw_query` method. This method takes a string and optionally an array of parameters. The string can contain placeholders, either in question mark or named placeholder syntax, which will be used to bind the parameters to the query.
 
     $people = ORM::for_table('person')->raw_query('SELECT p.* FROM person p JOIN role r ON p.role_id = r.id WHERE r.name = :role', array('role' => 'janitor')->find_many();