在 EntityDataSource CommandText 中使用 ISNULL 函数

Question

I wrote below query in EntityDataSource CommandText .

SELECT FIRST_NAME + ' ' + ISNULL(LAST_NAME, '') AS Customer
FROM CUSTOMER

but there is an error as isnull cannot be resolved into valid type or function .

how cold i solve this ? what should i use instead of ISNULL ?

Answer 1

There is no support for ISNULL in entity sql. You'll have to resort to CASE WHEN :

CASE
    WHEN LAST_NAME IS NULL THEN '' 
    ELSE LAST_NAME 
END

Can't help it.