我正在创建一个包含delete语句和游标用法的存储过程。问题是我不能同时使用这两者。

这是一个独立的MWE。

drop table if exists T1;
create table T1(f1 int, f2 int);
insert into T1 values(1, 1);
insert into T1 values(2, 2);
insert into T1 values(3, 3);

drop table if exists T2;
create table T2(f3 int, f4 int);
insert into T2 values(1, 11);
insert into T2 values(2, 22);
insert into T2 values(3, 33);


drop procedure if exists proc1;
DELIMITER //
CREATE PROCEDURE proc1(inputValue int)
    BEGIN
    declare i int;
    declare cursorSize int;
    declare anF1 int;
    declare anF2 int;

    -- Block 1 - Begin:    
    delete from T2 where f3 = inputValue;
    -- Block 1 - End.    
    
    -- Block 2 - Begin:    
    declare cur1 cursor for 
        select f1, f2  
            from T1
            where f1 <= inputValue;
    open cur1;

    select FOUND_ROWS() into cursorSize;
    if (cursorSize > 0) then
        set i = 0;
        while i < cursorSize DO
            fetch cur1 into anF1, anF2;
                insert into T2 values(anF1, anF2);
            set i = i + 1;
            end while;
        end if;

    close cur1;
    -- Block 2 - End.    
    
    END //
DELIMITER ;

call proc1(3);

如果取消对块1中的delete语句的注释,则会收到此错误:

1064-您的SQL语法有错误;请查看与MySQL服务器版本对应的手册,以获得正确的语法

    'declare cur1 cursor for 
    select f1, f2  
        from T1
        where f1 <=' at line 10

请帮我解决这个问题。