Portal SPI_cursor_open_with_args(const char *name,
const char *command,
int nargs, Oid *argtypes,
Datum *values, const char *nulls,
bool read_only, int cursorOptions)SPI_cursor_open_with_args sets up
a cursor (internally, a portal) that will execute the specified
query. Most of the parameters have the same meanings as the
corresponding parameters to SPI_prepare_cursor and SPI_cursor_open.
For one-time query execution, this function should be preferred
over SPI_prepare_cursor followed by
SPI_cursor_open. If the same command
is to be executed with many different parameters, either method
might be faster, depending on the cost of re-planning versus the
benefit of custom plans.
The passed-in parameter data will be copied into the cursor's portal, so it can be freed while the cursor still exists.
name for portal, or NULL to let the system select a name
command string
number of input parameters ($1, $2, etc.)
an array of length nargs, containing the OIDs of the data types of the parameters
an array of length nargs, containing the actual parameter values
an array of length nargs, describing which parameters are null
If nulls is NULL then SPI_cursor_open_with_args assumes that no
parameters are null. Otherwise, each entry of the nulls array should be ' ' if the corresponding parameter value is
non-null, or 'n' if the corresponding
parameter value is null. (In the latter case, the actual value in
the corresponding values entry doesn't
matter.) Note that nulls is not a text
string, just an array: it does not need a '\0' terminator.
true for read-only execution
integer bit mask of cursor options; zero produces default behavior