リソース型
There are four 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 last two a resource which holds the query results of BLOB/CLOB data types.
connection identifier
A connection identifier returned by cubrid_connect(), cubrid_connect_with_url(), cubrid_pconnect() and cubrid_pconnect_with_url().
request identifier
A request identifier returned by cubrid_prepare() and cubrid_execute().
LOB identifier
A LOB identifier returned by cubrid_lob_get().
LOB2 identifier
A LOB identifier returned by cubrid_lob2_new() or get from the result set.
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