An application specifies the beginning of a new transaction by calling IIapi_query() with a input parameter qy_tranHandle. If the parameter is a NULL pointer or is a transaction ID handle created by IIapi_registerXID(), a new transaction is begun and a transaction handle is allocated and returned in qy_tranHandle. If the qy_tranHandle input value is a transaction handle returned by a previous call to IIapi_query() or IIapi_xaStart(), the query is performed as part of the already-opened transaction. If the qy_tranHandle input value is an autocommit transaction handle returned by IIapi_autoCommit(), the query is executed and the results are immediately committed by the server.