函數在返回bigint時抱怨[不允許從函數返回結果集]

Question

我忘記了放分隔符指令，一些分號並且使用了在mysql中無效的[select variable = field]這樣的tsl語法。
使用tsl語法時發生Mysql錯誤是[不允許從函數返回結果集]並且沒有多大幫助。
@AndreKR把它全部給我，謝謝。
我使用mysqlworkbench 5.2.30 CE。 成爲功函數：

delimiter // 
CREATE FUNCTION nextval (seq_name varchar(100)) 
    RETURNS bigint(20) 
    READS SQL DATA 
    NOT DETERMINISTIC 
    BEGIN 
    DECLARE workval bigint(20); 
    SELECT count(1) into workval 
     FROM tip_sequence 
     WHERE sequencename = seq_name; 
    IF workval <> 1 THEN 
     DELETE 
      FROM tip_sequence 
      WHERE sequencename = seq_name; 
     INSERT 
      INTO tip_sequence (sequencename, sequenceval, sequencestep) 
      VALUES (seq_name, 1, 1); 
    END IF; 
    SELECT sequenceval into workval 
     FROM tip_sequence 
     WHERE sequencename = seq_name; 
    UPDATE tip_sequence 
     SET sequenceval = sequenceval + sequencestep 
     WHERE sequencename = seq_name; 
    RETURN workval; 
    END// 
delimiter ; 

Answer 1

我不認爲SELECT workval = count(1) FROM ...語法是有效的。我認爲你的意思是：SELECT count(1) INTO workval FROM ...。