SQLGetPoolID is used to obtain the pool ID given a set of connection information (from SQLSetConnectAttrForDbcInfo, SQLSetDriverConnectInfo, and SQLSetConnectInfo). This pool ID is used to identify a set of connections that can be used interchangeably (possibly requiring an additional reset). The pool ID will be used to identify the connection pool for that group of connections.
Whenever a driver returns SQL_ERROR or SQL_INVALID_HANDLE, the Driver Manager returns the error to the application (in SQLConnect or SQLDriverConnect).
Whenever a driver returns SQL_SUCCESS_WITH_INFO, the Driver Manager will obtain the diagnostic information from hDbcInfoToken, and return SQL_SUCCESS_WITH_INFO to the application in SQLConnect and SQLDriverConnect.
Applications should not call this function directly. An ODBC driver that supports driver-aware connection pooling must implement this function.