Best way to check if SYS_REFCURSOR is empty Best way to check if SYS_REFCURSOR is empty oracle oracle

Best way to check if SYS_REFCURSOR is empty


You need to execute a FETCH against the cursor prior to using the %FOUND attribute. Change your code to something like

DECLARE  recs_Table SYS_REFCURSOR;  nTable_1_value  NUMBER;  nTable_2_value  NUMBER;begin    open recs_Table for       select * from table1, table2;    FETCH recs_Table INTO nTable_1_value, nTable_2_value;    if recs_Table%found then        --do this    else        --do that    end if;end;

Note that the way you'll probably need to add variables to the INTO clause of the FETCH statement, one for each column in TABLE1 and TABLE2. Note also that the way this cursor is written you'll probably get more rows returned than you might expect; because there is no join criteria specified you'll get what's called a Cartesian join, where each row in TABLE1 is joined to each row in TABLE2 - thus, the number of rows you'll get back is (# of rows in TABLE1) * (# of rows in TABLE2).

A potentially simpler way to do this would be to use a cursor FOR loop, as follows:

DECLARE  bData_found  BOOLEAN := FALSE;begin  FOR aRow IN (select * from table1, table2)  LOOP    -- If the program gets here, it means a row was fetched    -- do this    bData_found := TRUE;    EXIT;  -- if you only care if data was found and don't want to            -- process all the rows  END LOOP;  IF NOT bData_found THEN    -- do that  END IF;end;

Share and enjoy.


we use two procedures to execute the result

create or replace procedure pro_sample(recs_Table out SYS_REFCURSOR) is    begin       open recs_Table for           select * from table1, table2;    end;

this above procedure will be used to open a cursor

create or replace procedure pro_sample(recs_Table out SYS_REFCURSOR) is   sam sys_refcursor;   var number;              -- if you have any variables then declare them  begin    pro_sample(sam);    fetch sam into var;    if sam%found then       --do this        else       --do that    end if;    close sam; end;

the above procedure will help you to know whether the cursor contains rows or not


create or replace procedure pro_sample(recs_Table out SYS_REFCURSOR) is    begin       open recs_Table for           select a,b,c,d from table1, table2;    end;create or replace function haveRows_pro_sample issam sys_refcursor;var varchar(200);varOut number:=0;    begin        pro_sample(sam);        fetch sam into var,var,var,var;           if sam%found then          varOut :=1;        end if;        return varOut;    end;