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Check if the fields identified by the field names both exists according to the schema.

Namespace: net.esper.view
Assembly:   NEsper (in NEsper.dll)

Syntax

Visual Basic (Declaration)
Public Shared Function Exists ( _
	type As EventType, _
	fieldNameOne As String, _
	fieldNameTwo As String _
) As String
C#
public static string Exists (
	EventType type,
	string fieldNameOne,
	string fieldNameTwo
)
Visual C++
public:
static String^ Exists (
	EventType^ type, 
	String^ fieldNameOne, 
	String^ fieldNameTwo
)

Parameters

type
net.esper.events.EventType
contains metadata about fields
fieldNameOne
System.String
is the first field's field name to test
fieldNameTwo
System.String
is the first field's field name to test

Return Value

a String error message if either of the fields doesn't exist, or null to indicate success