NAME

odbx_capabilities - Query implemented capabilities

SYNOPSIS

#include <opendbx/api.h>

int odbx_capabilities
(odbx_t* handle, unsigned int cap);

DESCRIPTION

odbx_capabilities() ask the backend associated to the connection object returned by odbx_init() if a certain capability set is implemented by this backend. All backends have to implement the basic capability set and may implement further predefined functional sets if they are supported by the native database client library. This function can be called at any stage after odbx_init() returned successfully.

The first parameter handle has to be the connection object created and returned by odbx_init(). It becomes invalid as soon as it was supplied to odbx_finish() and odbx_capabilities() will return an error in this case.

cap is the number of the capability set as defined by macro constants in odbx.h. Valid constant names which can be supplied as second parameter to odbx_capabilities() are listed below:

-ODBX_CAP_BASIC

The core function set which have to be implemented by all backends. It consists of all functions necessary to connect to, send textual queries to and process simple results returned from the database server as well as error handling functions.

RETURN VALUE

odbx_capabilities() returns ODBX_ENABLE if the requested capability is supported, ODBX_DISABLE if the capability is not supported or an error code whose value is less than zero if one of the supplied parameters is invalid. Possible error codes are listed in the error section and they can be feed to odbx_error() and odbx_error_type() to get further details.

ERRORS

-ODBX_ERR_PARAM

handle is NULL or the supplied connection object is invalid

SEE ALSO

odbx_error(), odbx_error_type(), odbx_init()