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 portalportal containing the cursor
bool forwardtrue for fetch forward, false for fetch backward
long countmaximum 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.
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