When a Client-Library command executes on a server, it generates various types of results, which are returned to the application that sent the command. The result types are as follows:
Regular row results
Cursor row results
Parameter results
Stored procedure return status results
Compute row results
Message results
Describe results
Format results
Results are returned to an application in the form of result sets. A result set contains only a single type of result data. Regular row and cursor row result sets contain multiple rows of data, but other types of result sets contain at most a single row of data.
An application processes results by calling ct_results, which indicates the type of result available by setting *result_type.
ct_results sets *result_type to CS_CMD_DONE to indicate that the results of a “logical command” have been completely processed. A logical command is generally considered to be any Client-Library command defined through ct_command, ct_dynamic, or ct_cursor. Exceptions to this rule are documented in “ct_results and logical commands” on page 567.
Some commands, for example a language command containing a Transact-SQL update statement, do not generate results. ct_results sets *result_type to CS_CMD_SUCCEED or CS_CMD_FAIL to indicate the status of a command that does not return results.
