Hi,
I saw one mapping implemented by my seniors . In Expression
transformation they implemented following logic. That is
iif(is_date(in_UC_DATINV,'YYYYMMDD'),to_date(in_UC_DATINV,'Y
YYYMMDD'),'Inventory Date is either invalid or null')
Inventory_Date is validated only for is_date()
But not validated for notisnull() .
But error says “ either invalid or null “ why?
Whether is_date() also check for not isnull() ? or in this
logic something is different ?
Please answer me .
Advance thanks
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Answer Posted / Prem Datt
The 'is_date()' function checks if the input value can be converted into a date format, but it does not check if the input value is null. If the input value is null, 'is_date()' will return false. However, in your expression, you are using the 'iif()' function which first evaluates the condition (in this case, 'is_date()'). Since the condition returned false for a null value, the second part of the 'iif()' function is executed, which returns 'Inventory Date is either invalid or null'. If you want to check if the input value is not null before checking if it is a valid date, you can use the 'not isnull()' function first and then apply 'is_date()'.
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