MySQL错误1172-结果包含多个行

在存储过程中运行查询时,我从MySQL收到此错误：

Error Code: 1172
Result consisted of more than one row

我理解错误：我正在执行SELECT(…)INTO(变量列表),因此需要查询才能返回单行.当我使用LIMIT 1或SELECT DISTINCT时,错误消失了.

但是：当我手动运行原始查询(没有LIMIT或DISTINCT)时,它确实返回了一行.因此,我怀疑自己可能遇到了MySQL错误.有人知道会发生什么吗？

编辑

我按要求发布了SQL.以下划线开头的所有内容都是在过程内部早先声明的变量.当我对其进行测试时,我将_cd_pai_vc替换为导致问题的记录的ID.

SELECT  a.valor,    IFNULL(p.valor, 0), fn_cd2alias(ra.cd_registro),    fn_cd2alias(IFNULL(p.valor,0))
INTO    _valor,     _cd_pai_vc,         _alias_verbete,                 _alias_pai
FROM dados_registros ra
    INNER JOIN dados_varchar255 a
    ON a.cd_registro = ra.cd_registro
        AND a.fl_excluido = 0
        AND a.alias = 'vc-verbetes-termo'
    LEFT OUTER JOIN dados_registros rp
        INNER JOIN dados_int p
        ON p.cd_registro = rp.cd_registro
            AND p.fl_excluido = 0
            AND p.alias = 'vc-remissoes-termo referenciado'
        INNER JOIN dados_int pt
        ON pt.cd_registro = rp.cd_registro
            AND pt.fl_excluido = 0
            AND pt.alias = 'vc-remissoes-tipo remissao'
            AND fn_cd2alias(pt.valor) = 'hierarquica'
    ON ra.cd_registro = rp.cd_entidade
        AND rp.fl_excluido = 0
        AND fn_cd2alias(rp.cd_modulo) = 'vc-remissoes'
WHERE ra.cd_registro = _cd_pai_vc 
    AND ra.fl_excluido = 0;

解决方法:

我遇到了这个问题,发现当我在select语句中使用表名和列名时,甚至是简单的表名和列名都消失了.

标签：mysql,stored-procedures
来源： https://codeday.me/bug/20191201/2082493.html