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Code Inspection: Null comparison

Reports comparisons with NULL that can be replaced with IS NULL or IS NOT NULL operators.

Example (Microsoft SQL Server):

CREATE TABLE foo ( id int ); SELECT * FROM foo WHERE NULL = NULL; SELECT * FROM foo WHERE NULL != NULL;

The NULL = NULL can be replaced with IS NULL, the NULL != NULL comparison with IS NOT NULL. To do this replacement, you can use Use IS NULL operator or Use IS NOT NULL operator quick-fixes.

SELECT * FROM foo WHERE NULL IS NULL; SELECT * FROM foo WHERE NULL IS NOT NULL;

Suppress an inspection in the editor

  1. Place the caret at the highlighted line and press Alt+Enter or click the Intention action icon.

  2. Click the arrow next to the inspection you want to suppress and select the necessary suppress action.

Last modified: 13 May 2022