Update library/Zend/Db/Adapter/Driver/Pdo/Statement.php

When you use Oracle, and table with CLOB columns, through CActiveRecord, everything works well till You'll try to save to column string greater than 4000 chars.
When string is 4k+ chars You'll get OCI exception, I've tried forcing the PDO::PARAM_LOB within COciCommandBuilder but with no luck, PARAM_LOB is still not working with oci, but there is a work around.
Researching, I discovered that passing the string size, I save more than 4000 characters in a field clob. 
Tested and worked!