如何在 laravel 5.5 迁移中将 DB::unprepared() 用于 mysql 函数和存储过程

Question

阅读旧问题后，我尝试在迁移文件中使用 DB::unprepared()。但它只给我 "A non-numeric value encountered" 错误并且数据库没有任何变化。但是，当我通过添加定界符将 sql 语句直接输入到 phpmyadmin 中时，它起作用了。请告诉我我缺少什么。

DB::unprepared('
    CREATE FUNCTION getNextCustomSeq
    (
        sSeqName VARCHAR(50),
        sSeqGroup VARCHAR(10)
    ) RETURNS VARCHAR(20)
    BEGIN
        DECLARE nLast_val INT;

        SET nLast_val =  (SELECT seq_val
                              FROM _sequence
                              WHERE seq_name = sSeqName
                                    AND seq_group = sSeqGroup);
        IF nLast_val IS NULL THEN
            SET nLast_val = 1;
            INSERT INTO _sequence (seq_name,seq_group,seq_val)
            VALUES (sSeqName,sSeqGroup,nLast_Val);
        ELSE
            SET nLast_val = nLast_val + 1;
            UPDATE _sequence SET seq_val = nLast_val
            WHERE seq_name = sSeqName AND seq_group = sSeqGroup;
        END IF;

        SET @ret = (SELECT concat(sSeqGroup,'-',lpad(nLast_val,6,0)));
        RETURN @ret;
    END//
    ');

Answer 1

哦，哈哈，打错了。你忘了转义行：

SET @ret = (SELECT concat(sSeqGroup,'-',lpad(nLast_val,6,0)));

应该是：

SET @ret = (SELECT concat(sSeqGroup,\'-\',lpad(nLast_val,6,0)));

已更新：

DB::unprepared('
    CREATE FUNCTION getNextCustomSeq
    (
        sSeqName VARCHAR(50),
        sSeqGroup VARCHAR(10)
    ) RETURNS VARCHAR(20)
    BEGIN
        DECLARE nLast_val INT;

        SET nLast_val =  (SELECT seq_val
                              FROM _sequence
                              WHERE seq_name = sSeqName
                                    AND seq_group = sSeqGroup);
        IF nLast_val IS NULL THEN
            SET nLast_val = 1;
            INSERT INTO _sequence (seq_name,seq_group,seq_val)
            VALUES (sSeqName,sSeqGroup,nLast_Val);
        ELSE
            SET nLast_val = nLast_val + 1;
            UPDATE _sequence SET seq_val = nLast_val
            WHERE seq_name = sSeqName AND seq_group = sSeqGroup;
        END IF;

        SET @ret = (SELECT concat(sSeqGroup,\'-\',lpad(nLast_val,6,0)));
        RETURN @ret;
    END//
');

这里发生的是你没有转义引号，PHP 认为你在做 'long chunk of text' - 'long chunk of text'，这当然会引发错误 A non-numeric value encountered。此警告告诉您您正在尝试对一个或多个非数字字符串进行数学表达式：http://php.net/manual/en/migration71.other-changes.php

如何在 laravel 5.5 迁移中将 DB::unprepared() 用于 mysql 函数和存储过程

how to use DB::unprepared() for mysql function and stored procedure in laravel 5.5 migration

php

mysql

laravel

stored-procedures

stored-functions