FETCH with a Scroll Cursor

These ESQL/C examples illustrate the FETCH statement with a scroll cursor:

EXEC SQL fetch previous q_curs into :orders;
EXEC SQL fetch last q_curs into :orders;
EXEC SQL fetch relative -10 q_curs into :orders;
printf("Which row? ");
scanf("%d",row_num); 
EXEC SQL fetch absolute :row_num q_curs into :orders;

A scroll cursor can fetch any row in the active set, either by specifying an absolute row position or a relative offset. Use the following cursor-position options to specify a particular row that you want to retrieve.

Keyword

Effect

NEXT

Retrieves next row in active set

PREVIOUS

Retrieves previous row in active set

PRIOR

Retrieves previous row in active set (Synonymous with PREVIOUS.)

FIRST

Retrieves the first row in active set

LAST

Retrieves the last row in active set

CURRENT

Retrieves the current row in active set (the same row as returned by the previous FETCH statement from the scroll cursor)

RELATIVE

Retrieves nth row, relative to the current cursor position in the active set, where position_num (or position_num_var) supplies n. A negative value indicates the nth row prior to the current cursor position. If position_num = 0, the current row is fetched.

ABSOLUTE

Retrieves nth row in active set, where row_position_var (or row_position) = n . Absolute row positions are numbered from 1.