SPI_scroll_cursor_fetch — fetch some rows from a cursor
void SPI_scroll_cursor_fetch(Portalportal
, FetchDirectiondirection
, longcount
)
SPI_scroll_cursor_fetch
fetches some rows from a
cursor. This is equivalent to the SQL command FETCH.
Portal portal
portal containing the cursor
FetchDirection direction
one of FETCH_FORWARD, FETCH_BACKWARD, FETCH_ABSOLUTE or FETCH_RELATIVE
long count
number of rows to fetch for FETCH_FORWARD or FETCH_BACKWARD; absolute row number to fetch for FETCH_ABSOLUTE; or relative row number to fetch for FETCH_RELATIVE
SPI_processed
and
SPI_tuptable
are set as in
SPI_execute
if successful.
See the SQL FETCH command
for details of the interpretation of the
direction
and
count
parameters.
Direction values other than FETCH_FORWARD may fail if the cursor's plan was not created with the CURSOR_OPT_SCROLL option.