COALESCE
expression returns null
if all its arguments evaluate to null
, and the value of the first non-null
argument otherwise. The return type is the type returned by the arguments if they are all of the same type, otherwise it is undetermined.
coalesce_expression::= COALESCE(scalar_expression {, scalar_expression}+)
@see CoalesceExpression
@version 2.4
@since 2.4
@author Pascal Filion
COALESCE
expression returns null
if all its arguments evaluate to null
, and the value of the first non-null
argument otherwise. The return type is the type returned by the arguments if they are all of the same type, otherwise it is undetermined.
coalesce_expression::= COALESCE(scalar_expression {, scalar_expression}+)
@see CoalesceExpression
@version 2.4
@since 2.4
@author Pascal Filion
|
|
|
|
|
|
|
|
|
|
|
|
|
|