Resource Types
There are three resource types used in CUBRID. The first one is the link identifier for a database connection, the second is the a resource which holds the result of a query, and the third a resource which holds the query results of BLOB/CLOB data types.
connection identifier
A connection identifier returned by cubrid_connect() and cubrid_connect_with_url().
request identifier
A request identifier returned by cubrid_prepare() and cubrid_execute().
LOB identifier
A LOB identifier returned by cubrid_lob_get().