SPI_cursor_move
SPI_cursor_move — move a cursor
Synopsis
void SPI_cursor_move(Portalportal, boolforward, longcount)
Description
SPI_cursor_move skips over some number of rows in a cursor. This is equivalent to a subset of the SQL command MOVE (see SPI_scroll_cursor_move for more functionality). 
Arguments
- Portal- portal
- portal containing the cursor 
- bool- forward
- true for move forward, false for move backward 
- long- count
- maximum number of rows to move 
Notes
 Moving backward may fail if the cursor's plan was not created with the CURSOR_OPT_SCROLL option.