Error "Each GROUP BY expression must contain at least one column that is not an outer reference" for valid SQL (4307754)

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Titre

Error "Each GROUP BY expression must contain at least one column that is not an outer reference" for valid SQL
Description

When optimizing, the following valid query prompts for bind variables when it shouldn't.
select Test_Bench.BenchName,
Test_Attributes.Name
FROM Test_Bench LEFT
JOIN Test_Session
ON PK_Test_Bench = FK_Test_Bench
LEFT JOIN Test_Suite
...
where Test_Bench.PK_Test_Bench = '10'
group by Test_Bench.BenchName, Test_Attributes.Name
ORDER BY Test_Attributes.Name
After clicking OK, the following error occurs:
"Each GROUP BY expression must contain at least one column that is not an outer reference"
Cause

Optimizer formats the query so that the LEFT is placed on line above i.e. FROM Test_Bench LEFT
so that the LEFT is now being interpreted as a table alias, hence the prompt for variables. The two columns now being interpreted as bind variables cause the GROUP BY to fail.
Résolution

WORKAROUND
Change the statement to include LEFT OUTER instead of LEFT i.e.
SELECT Test_Bench.BenchName,
Test_Attributes.Name
FROM Test_Bench
LEFT OUTER JOIN Test_Session
.
.
.
STATUS
Waiting for fix in a future release of release of SQL Optimizer for SQL Server.
Identifiant du défaut

QSOSS-568

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Contenu recommandé

Produit(s) :: SQL Optimizer for SQL Server
10.1.2, 10.1.1, 10.1, 10.0.3, 10.0.1

Historique de l’article :: Créé le : 8/12/2016
Dernière mise à jour le : 5/7/2023

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