SQL 缺少存储过程语法错误 'end'

Question

我一直在研究 SQL 存储过程，对这个过程还很陌生。我正在尝试编写一个从一个 table 中检索值并将其作为新行的一部分插入到另一个中的过程。

我正在使用 MySQL Workbench，它在第

行给我一个错误

WHERE blockId = blk;

作为以下代码的一部分：

CREATE DEFINER=`root`@`localhost` PROCEDURE `add_userblock`(IN user INT(11), IN blk INT(11))
BEGIN
    -- Determine how many blocks you can add
    DECLARE blockNum INT DEFAULT -1;
    SELECT addCount INTO blockNum
        FROM block
        WHERE blockId = blk;

    -- Determine if the block already exists for the user
    DECLARE entryExists INT DEFAULT 0;
    SELECT COUNT(*) INTO entryExists
        FROM userblock
        WHERE blockId = blk AND userId = user;

    IF (entryExists = 0)
        -- This is a new entry
        BEGIN
        INSERT INTO userblock (userId, blockId, num) VALUES (user, blk, blockNum);
        SELECT LAST_INSERT_ID() as 'id';
        END
    ELSE
        -- This is an existing entry
        BEGIN
        UPDATE userblock
            SET num = (num + blockNum)
            WHERE userId = user AND blockId = blk;
        END
END

错误是"Syntax error: missing 'end'"。我不完全确定这是什么意思，我在解决问题时遇到了问题。

谢谢，感谢您的宝贵时间！

Answer 1

在ELSE块

之后添加END IF

CREATE 
DEFINER=`root`@`localhost` 
PROCEDURE `add_userblock`(
  IN user INT(11), 
  IN blk INT(11)
)
BEGIN
-- Determine how many blocks you can add
DECLARE blockNum INT DEFAULT -1;
SELECT addCount INTO blockNum
  FROM block
 WHERE blockId = blk;

-- Determine if the block already exists for the user
DECLARE entryExists INT DEFAULT 0;
SELECT COUNT(*) INTO entryExists
  FROM userblock
 WHERE blockId = blk
   AND userId = user;

IF (entryExists = 0)
    -- This is a new entry
    BEGIN
    INSERT INTO userblock (userId, blockId, num) VALUES (user, blk, blockNum);
    SELECT LAST_INSERT_ID() as 'id';
    END
ELSE
    -- This is an existing entry
    UPDATE userblock
       SET num = (num + blockNum)
     WHERE userId = user AND blockId = blk;
END IF
END

Answer 2

在帮助下，我能够使用以下代码解决问题（至少就编译而言）：

CREATE DEFINER=`root`@`localhost` PROCEDURE `add_userblock`(IN user INT(11), IN blk INT(11))
BEGIN
    DECLARE blockNum INT DEFAULT -1;
    DECLARE entryExists INT DEFAULT 0;

    -- Determine how many blocks you can add
    SELECT addCount INTO blockNum
        FROM block
        WHERE blockId = blk;

    -- Determine if the block already exists for the user
    SELECT COUNT(*) INTO entryExists
        FROM userblock
        WHERE blockId = blk AND userId = user;

    IF entryExists = 0
    THEN
        -- This is a new entry
        INSERT INTO userblock (userId, blockId, num) VALUES (user, blk, blockNum);
        SELECT LAST_INSERT_ID() as 'id';
    ELSE
        -- This is an existing entry
        UPDATE userblock
            SET num = (num + blockNum)
            WHERE userId = user AND blockId = blk;
        SELECT LAST_INSERT_ID() as 'id';
    END IF;
END

这个问题似乎是两件事的结合：

我对 MySQL workbench 的存储过程使用了错误的 IF ELSE 语法
我需要在过程的顶部声明我的变量

感谢支持！

SQL 缺少存储过程语法错误 'end'

SQL Stored Procedure Syntax error missing 'end'

mysql

sql

stored-procedures