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How to write an HQL query like this SQL Query?
SELECT IsNull(name, '') FROM users
When I search for HQL IsNull, All results are for IS NULL or IS NOT NULL
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Definition and Usage. The ISNULL() function returns a specified value if the expression is NULL. If the expression is NOT NULL, this function returns the expression.
IFNULL is equivalent to ISNULL. IFNULL is equivalent to COALESCE except that IFNULL is called with only two arguments. ISNULL(a,b) is different from x IS NULL . The arguments can have any data type supported by Vertica.
No. You have to use is null and is not null in HQL. Save this answer.
We use IS NULL to identify NULL values in a table. For example, if we want to identify records in the employee table with NULL values in the Salary column, we can use IS NULL in where clause.
If you check the Hibernate documentation you can see that they provide many useful expressions for such statements, you can check the CASE expressions section where it says that you can use coalesce() expression instead of ISNull().
So your query will be:
SELECT coalesce(name, '') FROM users
You can check their Simple case expression example for further details.
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