SPI_cursor_fetch — fetch some rows from a cursor
void SPI_cursor_fetch(Portalportal
, boolforward
, longcount
)
SPI_cursor_fetch
fetches some rows from a
cursor. This is equivalent to a subset of the SQL command
FETCH
(see SPI_scroll_cursor_fetch
for more functionality).
Portal portal
portal containing the cursor
bool forward
true for fetch forward, false for fetch backward
long count
maximum number of rows to fetch
SPI_processed
and
SPI_tuptable
are set as in
SPI_execute
if successful.
Fetching backward may fail if the cursor's plan was not created
with the CURSOR_OPT_SCROLL
option.