MySQL Stored Procedures Syntax Fehler

Question

Ich versuche, Code für meine gespeicherte Prozedur unten auszuführen, und es löst Fehler bei Zeile 14. Ich bin nicht in der Lage zu lokalisieren, was Fehler ist, mir helfen, zu lösen.

DELIMITER $$ 
    CREATE PROCEDURE usp_SetGems (
    -- Add the parameters for the stored procedure here 
    p_requestid int/* =null */, 
    p_akcija int/* =null */) 
BEGIN 
    -- SET NOCOUNT ON added to prevent extra result sets from 
    -- interfering with SELECT statements. 

    -- Insert statements for procedure here 
    if p_akcija = 0 then 

    declare @v_userId char(36); 
    declare @v_vingems int; 

    select @v_userId:=r.user_id, @v_vingems := r.value from Requests r 
    where r.Id=p_requestid; 

    update Users 
    set balance=balance+@v_vingems 
    where id=v_userId; 

    else 

    declare @v_userrId longtext; 
    declare @v_vingemss int; 

    select @v_userrId.user_id:=r.user_id, @v_vingemss := r.value from Requests r 
    where r.Id=p_requestid; 

    update Users 
    set balance=balance-@v_vingems 
    where id=v_userrId; 
    end if; 
end; $$  
DELIMITER ; 

Answer 1

Ihre Declare-Anweisung falsch sind (@v_userId char (36) erklären, erklären @v_vingems int; .....). Unten ist der korrekte Code Ihres Verfahrens: -

DELIMITER $$ 
    CREATE PROCEDURE usp_SetGems (
    -- Add the parameters for the stored procedure here 
    p_requestid int/* =null */, 
    p_akcija int/* =null */) 
    BEGIN 
    -- SET NOCOUNT ON added to prevent extra result sets from 
    -- interfering with SELECT statements. 

    -- Insert statements for procedure here 
    if p_akcija = 0 then 
     BEGIN 
      select r.user_id, r.value INTO @v_userId, @v_vingems from Requests r 
      where r.Id=p_requestid; 
      update Users 
      set balance=balance+@v_vingems 
      where id=v_userId; 
     END; 
    else 
     BEGIN 
      select r.user_id, r.value INTO @v_userId, @v_vingems from Requests r 
      where r.Id=p_requestid; 

      update Users 
      set balance=balance-@v_vingems 
      where id=v_userrId; 
     END; 
    end if; 
end $$ 
DELIMITER ; 

Answer 2

Sie haben ein reserviertes Wort in Ihrer Auswahl. "In"

select r.user_id,r.value **into** v_userrId, v_vingems from Requests r 
where r.Id=p_requestid;