MySQL 分隔符不工作

Question

我试过来自 this site 的教程，在存储过程中插入示例表和一些测试数据。但不幸的是，出现了一条错误消息，说 DELIMITER 有问题。整个脚本是:

CREATE TABLE filler (
    id INT NOT NULL PRIMARY KEY AUTO_INCREMENT
) ENGINE=Memory;

CREATE TABLE t_hierarchy (
    id INT NOT NULL PRIMARY KEY,
    parent INT NOT NULL,
    lft INT NOT NULL,
    rgt INT NOT NULL,
    sets LineString NOT NULL,
    data VARCHAR(100) NOT NULL,
    stuffing VARCHAR(100) NOT NULL
) ENGINE=MyISAM;

DELIMITER $$

CREATE PROCEDURE prc_filler(cnt INT)
BEGIN
    DECLARE _cnt INT;
    SET _cnt = 1;
    WHILE _cnt <= cnt DO
            INSERT
            INTO    filler
            SELECT  _cnt;
            SET _cnt = _cnt + 1;
    END WHILE;
END;

CREATE PROCEDURE prc_hierarchy(width INT)
main:BEGIN
    DECLARE last INT;
    DECLARE level INT;
    SET last = 0;
    SET level = 0;
    WHILE width >= 1 DO
            INSERT
            INTO    t_hierarchy
            SELECT  COALESCE(h.id, 0) * 5 + f.id,
                    COALESCE(h.id, 0),
                    COALESCE(h.lft, 0) + 1 + (f.id - 1) * width,
                    COALESCE(h.lft, 0) + f.id * width,
                    LineString(
                    Point(-1, COALESCE(h.lft, 0) + 1 + (f.id - 1) * width),
                    Point(1, COALESCE(h.lft, 0) + f.id * width)
                    ),
                    CONCAT('Value ', COALESCE(h.id, 0) * 5 + f.id),
                    RPAD('', 100, '*')
            FROM    filler f
            LEFT JOIN
                    t_hierarchy h
            ON      h.id >= last;
            SET width = width / 5;
            SET last = last + POWER(5, level);
            SET level = level + 1;
    END WHILE;
END
$$

DELIMITER ;

START TRANSACTION;
CALL prc_filler(5);
CALL prc_hierarchy(585937);
COMMIT;

CREATE INDEX ix_hierarchy_parent ON t_hierarchy (parent);
CREATE INDEX ix_hierarchy_lft ON t_hierarchy (lft);
CREATE INDEX ix_hierarchy_rgt ON t_hierarchy (rgt);
CREATE SPATIAL INDEX sx_hierarchy_sets ON t_hierarchy (sets);

在 MySQL 5.0.51a-24+lenny2 服务器上执行此操作会出现以下错误消息:

[Err] 1310 - End-label $$ without match

有谁知道为什么会发生这种情况以及如何解决它？

Answer 1

$$ 应该在每个创建的过程之后。

CREATE PROCEDURE prc_filler(cnt INT)
BEGIN
    DECLARE _cnt INT;
    SET _cnt = 1;
    WHILE _cnt <= cnt DO
            INSERT
            INTO    filler
            SELECT  _cnt;
            SET _cnt = _cnt + 1;
    END WHILE;
END$$ -- here's your problem

这就是它被称为定界符的原因 - 它分隔 SQL 命令。你有 ';'程序内部和程序外部的“$$”。