| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | helpviewer_keywords | ||
|---|---|---|---|---|---|---|---|---|---|---|
SQLAllocConnect Mapping |
SQLAllocConnect Mapping |
David-Engel |
davidengel |
01/19/2017 |
sql |
connectivity |
reference |
|
When an application calls SQLAllocConnect through an ODBC 3.x driver, the call to SQLAllocConnect(henv, phdbc) is mapped to SQLAllocHandle as follows:
-
The Driver Manager allocates a connection and returns it to the application.
-
When the application establishes a connection, the Driver Manager calls
SQLAllocHandle(SQL_HANDLE_DBC, InputHandle, OutputHandlePtr)in the driver with InputHandle set to henv, and OutputHandlePtr set to phdbc.