Conditional functions

This section describes the following conditional functions
  • COALESCE: Returns the first input that is not null. If an input is an array, the whole array is returned. Empty arrays are not selected and are considered to be equivalent to a null value.
  • IF_ELSE: If there is a 'true' boolean value in the 'condition' parameter then return the second argument. In all other cases, return the third argument
  • NULL_IF: If there is a 'true' boolean value in the 'condition' parameter, then return null. Otherwise, return the second argument
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