Name
DB.DBA.BAG_OF_NONNULLS_OR_NULL_AGG — Returns a vector of passed values ignoring NULL arguments.
Synopsis
vector
DB.DBA.BAG_OF_NONNULLS_OR_NULL_AGG
(
|
value_expression
any
); |
Description
DB.DBA.BAG_OF_NONNULLS_OR_NULL_AGG returns a vector
of passed values. Similar to
DB.DBA.BAG_OF_NONNULLS_AGG()
but returns NULL instead of an empty vector if no arguments were passed or
only NULLs were passed.
The order of items in the vector is not predefined and may vary from run to run.
Parameters
value_expression
Value of item for aggregation.
Return Types
Any. If no arguments were passed teturns NULL instead of an empty vector or only NULLs were passed.
Examples
Example 24.9. Simple Use
SELECT DB.DBA.BAG_OF_NONNULLS_OR_NULL_AGG (subquery.X)
FROM (SELECT X FROM ... ORDER BY X) as subquery