public class EPTypeNull extends Object implements EPType
EPTypeNull
represents a null-type.
EPL allows null-typed columns, such as in create schema MyEvent(emptyColumn null)
.
EPL allows null to occur in the select-clause, as exemplified in select null as item from OrderEvent
.
Your application may obtain the property type using EventType.getPropertyEPType(String)
which returns INSTANCE
when the property is of type null.
EPTypeNull
is a singleton.
Modifier and Type | Field and Description |
---|---|
static EPTypeNull |
INSTANCE
Instance.
|
public static final EPTypeNull INSTANCE
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