Unused common table expression
Reports unused common table expressions (CTE) inside the query.
Example (PostgreSQL):
CREATE TABLE foo(a INT);
WITH a AS (SELECT 1 AS x FROM foo)
SELECT 1 + 2 FROM foo;
By using WITH, we create a temporary named result set with the name a, also known as a common table expression (CTE). But we do not use this CTE later in the code. The unused CTE is greyed out.
Inspection Details | |
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Available in: | AppCode 2023.3, CLion 2023.3, DataGrip 2023.3, DataSpell 2023.3, GoLand 2023.3, IntelliJ IDEA 2023.3, JetBrains Rider 2023.1, PhpStorm 2023.3, PyCharm 2023.3, Qodana for .NET 2023.1, Qodana for JVM 2023.3, Qodana for PHP 2023.3, Qodana for Ruby 2023.3, RubyMine 2023.3 |
Plugin: | Database Tools and SQL, 233.SNAPSHOT |
Last modified: 13 July 2023