Using CASE instead of conditional function and vice versa

Reports situations when CASE and IF are interchangeable.

Example (MySQL):

SELECT CASE
WHEN C1 IS NULL THEN 1
ELSE 0
END
FROM dual;

To keep your code short, you can replace the CASE structure with IF. You can do that by applying the Replace with 'IF' call intention action. The example code will look as follows:

SELECT IF(C1 IS NULL, 1, 0)
FROM dual;

To revert IF to CASE, click IF and apply the Replace with CASE expression intention action.

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

SqlCaseVsIfInspection

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | SQL

Inspection options

Here you can find the description of settings available for the Using CASE instead of conditional function and vice versa inspection, and the reference of their default values.

Prefer CASE expressions over IF functions: Not selected

Availability

By default bundled with: CLion 2024.1, DataGrip 2024.1, DataSpell 2024.1, GoLand 2024.1, IntelliJ IDEA 2024.1, JetBrains Rider 2023.3, PhpStorm 2024.1, PyCharm 2024.1, Qodana for .NET 2023.3, Qodana for Go 2024.1, Qodana for JVM 2024.1, Qodana for PHP 2024.1, Qodana for Ruby 2024.1, RubyMine 2024.1,
Can be installed with plugin: Database Tools and SQL, 241.SNAPSHOT

Last modified: 18 June 2024