Musíte definovat nový BLOK uvnitř vaší první smyčky kurzoru a v tomto bloku použít různé deklarace.
Něco jako:
BLOCK1: begin
declare v_col1 int;
declare no_more_rows boolean1 := FALSE;
declare cursor1 cursor for
select col1
from MyTable;
declare continue handler for not found
set no_more_rows1 := TRUE;
open cursor1;
LOOP1: loop
fetch cursor1
into v_col1;
if no_more_rows1 then
close cursor1;
leave LOOP1;
end if;
BLOCK2: begin
declare v_col2 int;
declare no_more_rows2 boolean := FALSE;
declare cursor2 cursor for
select col2
from MyOtherTable
where ref_id = v_col1;
declare continue handler for not found
set no_more_rows2 := TRUE;
open cursor2;
LOOP2: loop
fetch cursor2
into v_col2;
if no_more_rows then
close cursor2;
leave LOOP2;
end if;
end loop LOOP2;
end BLOCK2;
end loop LOOP1;
end BLOCK1;