Problem description
An error occurred while processing a SelectObject request.
Causes
SelectObject returns errors through two channels depending on when the failure is detected:
HTTP response header and body: OSS returns an HTTP status code in the response header and an error message in the response body, consistent with other OSS operations. Errors returned this way indicate input errors such as an invalid SQL statement or data errors.
End Frame in the response body: OSS returns error codes in the End Frame of the response body. This occurs when the data is incorrect or does not match the data type specified in the SQL statement — for example, when a column contains a string value but the SQL statement declares it as integer. In these cases, part of the data is processed and sent to the client, and HTTP status code 206 is still returned.
Examples
None
Solutions
Use the error code and error message to troubleshoot the issue:
For errors returned in the HTTP response header and body: read the error message in the response body.
For errors returned in the End Frame: parse the End Frame in the response body to extract the error code and message.