ODBC request flow When using ODBC, which component translates ODBC calls into DBMS-specific operations and submits SQL to the target data source?
Correct Answer: Driver.
Introduction / Context:The ODBC architecture is layered for portability. Applications call a standard API, the Driver Manager routes calls to the correct Driver, and the driver converts those calls into the native protocol and SQL dialect of the DBMS behind a particular data source.
Given Data / Assumptions:
- We are distinguishing the roles of Driver Manager vs Driver.
- The data source identifies the target database plus connection details.
- The DBMS ultimately executes SQL after translation.
Concept / Approach:
The Driver implements the ODBC specification for a specific DBMS. It receives ODBC API requests (via the Driver Manager), translates them to DBMS-native calls and SQL, handles protocol nuances, submits statements, and marshals results back to ODBC structures. The Driver Manager merely dispatches and coordinates; it does not translate SQL.
Step-by-Step Solution:
Application → ODBC API → Driver Manager → specific Driver.Driver translates and submits SQL/protocol calls to the DBMS.DBMS runs the queries and returns results through the Driver back to the app.Therefore, the translating/submitting component is the Driver.Verification / Alternative check:
ODBC reference diagrams consistently place translation duties in the Driver layer; the Driver Manager focuses on routing and configuration.
Why Other Options Are Wrong:
- A: A data source is configuration, not an active component.
- C: The Driver Manager dispatches, not translates.
- D: The DBMS executes but does not implement the ODBC API.
- E: Network hardware is outside the ODBC logical model.
Common Pitfalls:
- Mistaking the Driver Manager for the component that rewrites SQL.
- Assuming the driver hides all dialect differences; some SQL still needs adjustments.
Final Answer:
Driver.