MySQL Error 1172 - Result consisted of more than one row - mysql

Question

I'm getting this error from MySQL when running a query inside a stored procedure:
Error Code: 1172
Result consisted of more than one row
I understand the error: I'm doing a SELECT (...) INTO (var list), and thus the query is required to return a single row. When I use LIMIT 1 or SELECT DISTINCT, the error goes away.
However: when I run the original query manually (without LIMIT or DISTINCT), it does return a single row. So I'm suspecting I may have bumped into a MySQL bug. Does anyone know what could be happening?
EDIT
I'm posting the SQL as requested. Everything that starts with an underscore is a variable declared earlier inside the procedure. When I test it, I'm replacing _cd_pai_vc with the ID for the record that is causing the problem.
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;

Answer 1

I had the similiar issue and when I put table alias it worked like a charm.
SELECT t.tax_amount,t.tax_percentage FROM nepse_tax t

Answer 2

I had this problem and found it went away when I used both table name and column name in select statements, even simple ones.

Answer 3

The issue i had was IN parameter and the column name both were same so altered IN parameter name and it worked

Answer 4

I have experienced the same error in mysql.
MySQL Error 1172 - Result consisted of more than one row
Then I saw the question:
mysql stored procedure error (1172, 'Result consisted of more than one row')
But it was not I meant to ask. LIMIT 1;-wasn't up to my expectation. It will just return the first row for all the case.
Then I started looking at this one deeply and now I got the solution.
This case happend because the code for stored procedure returns multiple rows and that was because I had many extra spaces and tab characters in my code[the code I wrote for stored procedure] and when I removed them with just one/two appropriate tab chars- it was just like a flying machine.
I don't know if it is the same case that you are experienced with. Anyway give a try.
Thank you.

Answer 5

I had the same problem, the solution by Nava Bogatee worked like a charm,
below is a part of the procedure
select attendance
into brb
from Stud
where Rno like rno;
This didn't work I have no idea why.
Then I changed this to
select t.attendance
into brb
from Stud t
where t.Rno like rno;
and it worked.
I guess due to some reason the Rno column is returning all the values in the table, that is why the multiple row error.